De Havilland DHC-4 CARIBOU User manual

~
!ft.
.. ,
PSM 1-4-2
DHC-4
CARIBOU
MODEL DHC-4A
MAINTENANCE MANUAL
THE DE HAVILLAND AIRCRAFT OF CANADA LIMITED
Downsview Ontario
1 JULY 1963
Revised 1st February 1972
":'
/
~
!ft.
.. ,
PSM 1-4-2
DHC-4
CARIBOU
MODEL DHC-4A
MAINTENANCE MANUAL
THE DE HAVILLAND AIRCRAFT OF CANADA LIMITED
Downsview Ontario
1 JULY 1963
Revised 1st February 1972
":'
/

DHC 4 CARIBOU MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
Insert this page and latest revised pages. Destroy superseded pages.
Page No.
Issue
Page No. Issue
*Title
I February 1972
*2-33 thru 2-34A
I February 1972
':'A I
February 1972
*2-34B Blank
I February 1972
*B 1
February 1972
2-35 thru 2-36A
I June 1970
~'C
I February 1972 2-37
Original
'~D
1
February 1972
2-38
1 February 1969
*E
1
February 1972
2-38A and 2-38B
15 July 1969
i
Original
*2-39 thru 2-40A
1 February 1972
ii Blank
Original 2-40B Blank
1 June 1970
iii
Original 2-41
15 July 1969
iv Blank
Original 2-42 thru 2-52
Original
1 -1
1 Decerrlber
1965 *2-53
1 February 1972
1 -2
Original
2-54 thru 2-74
Original
1-3 and 1-4
1 December 1965 *2-75
1 February 1972
1 -5
Original 2 - 76 thru 2 -79
Original
1-6
1 December 1965 *2-80 and 2-81
1 February 1972
1 -7 thru 1 -11
Original 2-82 and 2-83
Original
1-12
I June 1970
*2-84
I February 1972
1-12A
1 February 1969 2-85
Original
1-12B Blank
1
February 1969 2-86
1 February 1969
1-13 thru 1 -14A
1
February 1969
2 -87 thru 2 -89
Original
1-14B Blank
I
February 1969
*2-90 and 2-91
I February 1972
1-15
Original 2-92 thru 2-101
Original
'~1 -16
1 February 1972
*2-102
I February 1972
1 -17 and 1 -18
Original 2-103 and 2-104
Original
'1:r>.-'
1-19
1 February 1969 *2-105
I February 1972
1-20
1 August 1963 2-106 thru 2-108
Original
1-21 and 1-22
Original *2-109 and 2-110
I February 1972
1 -23 thru 1 -24A
1 February 1969
2 -Ill thru 2 -113
Original
1-24B Blank 1
February 1969
*2-114
1 February 1972
1-25
1 February 1969
2-115 thru 2-119
Original
*1-26
I February 1972
*2-120 and 2-121
I February 1972
1 -27
I August 1963
2-122 thru 2-130
Original
I -28 and 1 -29
1 June 1970
*2-131
1 February 1972
1-30 thru 1 -32
1 February 1969
2-132 thru 2-159
Original
'~1 -33 and 1 -34
1 February 1972 2-160
1 February 1969
*2-1
1 February 1972 2-161
1 December 1965
2-2
Original
2-162
1 June 1970
*2-3
1 Fe bruary 1972 2-163 and 2-164
1 February 1970
2-4 Blank
Original
2-164A thru 2-164C
1 June 1970
2-5
15 July 1969
2-164D Blank
1 June 1970
2-6
Original
*2-165
1 February 1972
2-6A
I June 1970
2-166 thru 2-166B
1 June 1970
2-6B Blank 15 July 1969
*2-167
1 February 1972
2-7 and 2-8
1 June 1970
2-168 thru 2-170
1 February 1969
':'2-9
1 February 1972
2-171
Original
2-10 thru 2-23
Original
2-172
1 Decerrlber 1965
2-24 thru 2-26
1 Decerrlber 1965
2-173
Original
2-27 thru 2-30A
I August 1963
2-174
15 July 1969
2-30B Blank 1 August 1963
2-175
Original
*2-31
1 February 1972
2-176 thru 2-176B
I June 1970
2-32
Original
2-177
1 February 1969
.,}
,
•
*The asterisk indicates pages revised.
added or deleted by current revision.
.~
THE DE HAVILLAND AmCRAFT OF CANADA LIMITED
DOWNSVIEW ONTARIO
A
Revised 1 February 1972
DHC 4 CARIBOU MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
Insert this page and latest revised pages. Destroy superseded pages.
Page No.
Issue
Page No. Issue
*Title
I February 1972
*2-33 thru 2-34A
I February 1972
':'A I
February 1972
*2-34B Blank
I February 1972
*B 1
February 1972
2-35 thru 2-36A
I June 1970
~'C
I February 1972 2-37
Original
'~D
1
February 1972
2-38
1 February 1969
*E
1
February 1972
2-38A and 2-38B
15 July 1969
i
Original
*2-39 thru 2-40A
1 February 1972
ii Blank
Original 2-40B Blank
1 June 1970
iii
Original 2-41
15 July 1969
iv Blank
Original 2-42 thru 2-52
Original
1 -1
1 Decerrlber
1965 *2-53
1 February 1972
1 -2
Original
2-54 thru 2-74
Original
1-3 and 1-4
1 December 1965 *2-75
1 February 1972
1 -5
Original 2 - 76 thru 2 -79
Original
1-6
1 December 1965 *2-80 and 2-81
1 February 1972
1 -7 thru 1 -11
Original 2-82 and 2-83
Original
1-12
I June 1970
*2-84
I February 1972
1-12A
1 February 1969 2-85
Original
1-12B Blank
1
February 1969 2-86
1 February 1969
1-13 thru 1 -14A
1
February 1969
2 -87 thru 2 -89
Original
1-14B Blank
I
February 1969
*2-90 and 2-91
I February 1972
1-15
Original 2-92 thru 2-101
Original
'~1 -16
1 February 1972
*2-102
I February 1972
1 -17 and 1 -18
Original 2-103 and 2-104
Original
'1:r>.-'
1-19
1 February 1969 *2-105
I February 1972
1-20
1 August 1963 2-106 thru 2-108
Original
1-21 and 1-22
Original *2-109 and 2-110
I February 1972
1 -23 thru 1 -24A
1 February 1969
2 -Ill thru 2 -113
Original
1-24B Blank 1
February 1969
*2-114
1 February 1972
1-25
1 February 1969
2-115 thru 2-119
Original
*1-26
I February 1972
*2-120 and 2-121
I February 1972
1 -27
I August 1963
2-122 thru 2-130
Original
I -28 and 1 -29
1 June 1970
*2-131
1 February 1972
1-30 thru 1 -32
1 February 1969
2-132 thru 2-159
Original
'~1 -33 and 1 -34
1 February 1972 2-160
1 February 1969
*2-1
1 February 1972 2-161
1 December 1965
2-2
Original
2-162
1 June 1970
*2-3
1 Fe bruary 1972 2-163 and 2-164
1 February 1970
2-4 Blank
Original
2-164A thru 2-164C
1 June 1970
2-5
15 July 1969
2-164D Blank
1 June 1970
2-6
Original
*2-165
1 February 1972
2-6A
I June 1970
2-166 thru 2-166B
1 June 1970
2-6B Blank 15 July 1969
*2-167
1 February 1972
2-7 and 2-8
1 June 1970
2-168 thru 2-170
1 February 1969
':'2-9
1 February 1972
2-171
Original
2-10 thru 2-23
Original
2-172
1 Decerrlber 1965
2-24 thru 2-26
1 Decerrlber 1965
2-173
Original
2-27 thru 2-30A
I August 1963
2-174
15 July 1969
2-30B Blank 1 August 1963
2-175
Original
*2-31
1 February 1972
2-176 thru 2-176B
I June 1970
2-32
Original
2-177
1 February 1969
.,}
,
•
*The asterisk indicates pages revised.
added or deleted by current revision.
.~
THE DE HAVILLAND AmCRAFT OF CANADA LIMITED
DOWNSVIEW ONTARIO
A
Revised 1 February 1972

---~~-----
DHC
4
CARIBOU
MAINTENANCE
MANUAL
LIST
OF
EFFECTIVE
PAGES
Insert
this
page
and
latest
revised
pages.
Destroy
superseded
pages.
Page
No.
Issue
Page
No.
Issue
2-178
Original
4-7
thru
4-28
Original
2-179
1
June
1970
*4-29
1
February
1972
2-180
Original
4-
30
thru
4-
32
Original
2-180A
and
2-180B
1
June
1970
4-33
25
July
1968
2-181
1
February
1969
4-34
1
June
1970
*2-182
thru
2-184A
1
February
1972
4-34A
1
February
1969
2-185
thru
2-189
Original
4-34B
Blank
1
February
1969
*2-190
thru
2-192
1
February
1972
4-35
1
February
1969
2-192A
1
June
1970
4-36
thru
4-38
Original
2-192B
Blank
1
February
1969
4-39
1
February
1969
2-193
and
2-194
Original
4
-40
and
4-41
Original
2-195
1
February
1969
4-42
and
4-42A
25
July
1968
*2-196
and
2-196A
1
February
1972
4-42B
Blank
25
July
1968
2-196B
Blank
15
July
1969
4-43
1
December
1965
*2-197
thru
2-199
1
February
1972
4
-44
and
4-45
Original
2-200
Original
4-46
25
July
1968
*2-201
1
February
1972
4-47
thru
4-49
Original
2-202
and
2-203
Original
4.,50
and
4-50A
25
July
1968
*2-204
1
February
1972
4-50B
Blank
25
July
1968
2-205
Original
4-51
thru
4-53
Or
iginal
*2-206
1
February
1972
4-54
1
February
1969
2-206A
thru
2-206C
1
June
1970
4-55
1
June
1970
2-206D
Blank
1
June
1970
4-56
and
4-56A
1
February
1969
2-207
thru
2-209
Original
4-S6B
Blank
1
February
1969
2-210
and
2-210A
1
June
1970
4-57
and
4-58
Original
2-210B
Blank
1
June
1970
4-59
1
February
1969
2-211
1
February
1969
4.60
Original
2-212
Original
4-61
1
February
1969
2-213
1
December
1965
4-62
Original
2-214
1
February
1969
4-63
thru
4-64A
I
February
1969
2-214A
1
December
1965
4-64B
Blank
1
February
1969
2-214B
Blank
1
December
1965
4-65
1
December
1965
2-215
and
2-216
1
February
1969
4-66
Original
2-217
and
2-218
15
July
1969
4-67
1
December
1965
*3-1
1
February
1972
*4-68
1
February
1972
3-2
Blank
Original
4-69
Original
3.3
1
February
1969
*4.70
1
February
1972
*3-4
and
3-5
1
February
1972
4-71
Original
3-6
thru
3-10
Original
4-72
25
July
1968
3-11
thru
3-13
1
February
1969
4-73
1
August
1963
3-14
Original
4-74
1
February
1969
3-14A
1
February
1969
4.75
thru
4.78D
1
August
1963
3-14B
Blank
1
February
1969
4-78E
thru
4-78G
1
February
1969
*3.15
thru
3-16A
1
February
1972
4 -7
8H
thru
4.7
8J
25
July
1968
*3.16B
Blank
1
February
1972
4-79
1
December
1965
3-17
thru
3-23
Original
4-80
1
August
1963
3
-24
Blank
Original
4-81
Original
*4-1
and
4.2
1
February
1972
4-82
thru
4-82B
1
January
1965
4-3
Original
4.83
1
August
1963
4.4
and
4.5
1
February
1969
4.84
Or
iginal
*4-6
1
February
1972
4-85
thru
4-90A
1
December
1965
*The
asterisk
indicates
pages
revis
ed.
added
or
deleted
by
curr
ent
revis
ion.
THE
DE
HAVILLAND
AIRCRAFT
OF
CANADA
LIMITED
DOWNSVIEW
ONTARIO
B
Revised
1
February
1972
I
---~~-----
DHC
4
CARIBOU
MAINTENANCE
MANUAL
LIST
OF
EFFECTIVE
PAGES
Insert
this
page
and
latest
revised
pages.
Destroy
superseded
pages.
Page
No.
Issue
Page
No.
Issue
2-178
Original
4-7
thru
4-28
Original
2-179
1
June
1970
*4-29
1
February
1972
2-180
Original
4-
30
thru
4-
32
Original
2-180A
and
2-180B
1
June
1970
4-33
25
July
1968
2-181
1
February
1969
4-34
1
June
1970
*2-182
thru
2-184A
1
February
1972
4-34A
1
February
1969
2-185
thru
2-189
Original
4-34B
Blank
1
February
1969
*2-190
thru
2-192
1
February
1972
4-35
1
February
1969
2-192A
1
June
1970
4-36
thru
4-38
Original
2-192B
Blank
1
February
1969
4-39
1
February
1969
2-193
and
2-194
Original
4
-40
and
4-41
Original
2-195
1
February
1969
4-42
and
4-42A
25
July
1968
*2-196
and
2-196A
1
February
1972
4-42B
Blank
25
July
1968
2-196B
Blank
15
July
1969
4-43
1
December
1965
*2-197
thru
2-199
1
February
1972
4
-44
and
4-45
Original
2-200
Original
4-46
25
July
1968
*2-201
1
February
1972
4-47
thru
4-49
Original
2-202
and
2-203
Original
4.,50
and
4-50A
25
July
1968
*2-204
1
February
1972
4-50B
Blank
25
July
1968
2-205
Original
4-51
thru
4-53
Or
iginal
*2-206
1
February
1972
4-54
1
February
1969
2-206A
thru
2-206C
1
June
1970
4-55
1
June
1970
2-206D
Blank
1
June
1970
4-56
and
4-56A
1
February
1969
2-207
thru
2-209
Original
4-S6B
Blank
1
February
1969
2-210
and
2-210A
1
June
1970
4-57
and
4-58
Original
2-210B
Blank
1
June
1970
4-59
1
February
1969
2-211
1
February
1969
4.60
Original
2-212
Original
4-61
1
February
1969
2-213
1
December
1965
4-62
Original
2-214
1
February
1969
4-63
thru
4-64A
I
February
1969
2-214A
1
December
1965
4-64B
Blank
1
February
1969
2-214B
Blank
1
December
1965
4-65
1
December
1965
2-215
and
2-216
1
February
1969
4-66
Original
2-217
and
2-218
15
July
1969
4-67
1
December
1965
*3-1
1
February
1972
*4-68
1
February
1972
3-2
Blank
Original
4-69
Original
3.3
1
February
1969
*4.70
1
February
1972
*3-4
and
3-5
1
February
1972
4-71
Original
3-6
thru
3-10
Original
4-72
25
July
1968
3-11
thru
3-13
1
February
1969
4-73
1
August
1963
3-14
Original
4-74
1
February
1969
3-14A
1
February
1969
4.75
thru
4.78D
1
August
1963
3-14B
Blank
1
February
1969
4-78E
thru
4-78G
1
February
1969
*3.15
thru
3-16A
1
February
1972
4 -7
8H
thru
4.7
8J
25
July
1968
*3.16B
Blank
1
February
1972
4-79
1
December
1965
3-17
thru
3-23
Original
4-80
1
August
1963
3
-24
Blank
Original
4-81
Original
*4-1
and
4.2
1
February
1972
4-82
thru
4-82B
1
January
1965
4-3
Original
4.83
1
August
1963
4.4
and
4.5
1
February
1969
4.84
Or
iginal
*4-6
1
February
1972
4-85
thru
4-90A
1
December
1965
*The
asterisk
indicates
pages
revis
ed.
added
or
deleted
by
curr
ent
revis
ion.
THE
DE
HAVILLAND
AIRCRAFT
OF
CANADA
LIMITED
DOWNSVIEW
ONTARIO
B
Revised
1
February
1972
I

DHC 4 CARIBOU MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
Insert this page and latest revised pages. Destroy superseded pages.
Page No.
Issue Page No. Issue
4-90B Blank
I December 1965
5-62B Blank
1 February 1969
4-91
Original
5 -63 thru 5 -64B
1 December 1965
*4-92
1 February 1972 5 -65 thru 5 -68B
1 December 1965
4-93 and 4-94
Original 5 -69 thru 5-72
1 December 1965
4-94A
1 December 1965 5 -73 thru 5 -76
Original
4-94B Blank
1 December 1965
5 -77 and 5 -7 8 1
December 1965
4-95 and 4-96
1 December 1965
5-79 and 5-80
Original
4-97 thru 4-104
Original
5 -81 and 5 -82
1 February 1969
5 -1 thru 5 -2A
1 December 1965
5-83 and 5-84
Original
5-2B Blank
1 December
1965
5 -85 thru 5 -87
1 February 1969
5 -3
Original
5 -88 thru 5 -91
Original
5 -4
I June 1970
5 -92 and 5 -9 3 1
December 1965
5-5
1 December 1965
5-94 thru 5-102
Original
5-6
Original
5 -1 03 and 5 -1 04
1 December 1965
5 -7
15 July 1969
5 -105
Original
5 -8
Original
5-106 and 5-106A
1 December 1965
*5-9
1 February 1972
5-106B Blank
1 December
1965
5-10 and 5-11
Original
5 -107
1 December 1965
5-12 thru 5-14A
1 February 1969
5 -108
Original
5-14B Blank
1
February 1969
5-109 thru 5-110A
1 December 1965
5 -15
1
December 1965
5-110B Blank
1 December 1965
5 -1 6 and 5 -16A 1
February 1969
5 -Ill
1 December 1965
5-16B Blank
February 1969
5-112 and 5-113
Original
5-17 and 5-18
1
February 1969
5-114
1 December 1965
5 -19
December 1965
5-115
Original
5 -20 and 5 -20A
June 1970
5 -116
1 December 1965
5-20B Blank
December 1965
5 -11 7 thru 5 -121
Original
5-21
February 1969
5-122 and 5-122A
1 December 1965
5-22
Original
5 -122B Blank
1 December 1965
5 -23 and 5 -24
1 February 1969
5 -123
I December 1965
5 -25 thru 5 -31
Original
5 -124 thru 5 -1 26
Original
5 -32 and 5 -33
1 February 1969
5-127
1 February 1969
5-34
Original
5-128
Original
5 -35
1 February 1969
5 -129
1 June 1970
5 -36 and 5 -37
Original
5 -130 and 5 -130A
1 February 1969
5-38
1 December 1965
5 -130B Blank
1 February 1969
5,-39
Original
5 -131
Original
5-40
1 December 1965
5 -132
1 June 1970
5 -41 thru 5 -44
Original
5 -133 thru 5 -137
Original
*5-45
1 February 1972
5 -138 thru 5 -140A
1 February 1969
5-46
Original
5 -140B Blank
1 February 1969
5 -47 thru 5 -48B
1 December 1965
5-141 and 5-142
Original
5 -49 thru 5 -5 2A
1 December 1965
5-143
1 December 1965
5-52B Blank
1 December 1965
5-144 thru 5-153
Original
5 -53
Original
5 -154
1 December 1965
5-54
1 February 1969
5-155 thru 5-159
Original
5-54A
1 December 1965
5-160 thru 5-163
1 December 1965
5-54B Blank
1 December 1965
5-164 and 5-165
1 June 1970
5 -55 and 5 -56
1 December 1965
5-166 and 5-167
1
December 1965
5 -57 thru 5 -60
Original
5 -168 and 5 -168A
February 1969
5 -61
thru 5-62A 1 February 1969
5 -168B Blank
February 1969
*The asterisk indicates pages revised.
added or deleted by current revision.
THE DE HAVILLAND AIRCRAFT OF CANADA LIMITED
C
DOWNSVIEW ONTARIO
Revised 1 February 1972
,
",
,
"-
DHC 4 CARIBOU MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
Insert this page and latest revised pages. Destroy superseded pages.
Page No.
Issue Page No. Issue
4-90B Blank
I December 1965
5-62B Blank
1 February 1969
4-91
Original
5 -63 thru 5 -64B
1 December 1965
*4-92
1 February 1972 5 -65 thru 5 -68B
1 December 1965
4-93 and 4-94
Original 5 -69 thru 5-72
1 December 1965
4-94A
1 December 1965 5 -73 thru 5 -76
Original
4-94B Blank
1 December 1965
5 -77 and 5 -7 8 1
December 1965
4-95 and 4-96
1 December 1965
5-79 and 5-80
Original
4-97 thru 4-104
Original
5 -81 and 5 -82
1 February 1969
5 -1 thru 5 -2A
1 December 1965
5-83 and 5-84
Original
5-2B Blank
1 December
1965
5 -85 thru 5 -87
1 February 1969
5 -3
Original
5 -88 thru 5 -91
Original
5 -4
I June 1970
5 -92 and 5 -9 3 1
December 1965
5-5
1 December 1965
5-94 thru 5-102
Original
5-6
Original
5 -1 03 and 5 -1 04
1 December 1965
5 -7
15 July 1969
5 -105
Original
5 -8
Original
5-106 and 5-106A
1 December 1965
*5-9
1 February 1972
5-106B Blank
1 December
1965
5-10 and 5-11
Original
5 -107
1 December 1965
5-12 thru 5-14A
1 February 1969
5 -108
Original
5-14B Blank
1
February 1969
5-109 thru 5-110A
1 December 1965
5 -15
1
December 1965
5-110B Blank
1 December 1965
5 -1 6 and 5 -16A 1
February 1969
5 -Ill
1 December 1965
5-16B Blank
February 1969
5-112 and 5-113
Original
5-17 and 5-18
1
February 1969
5-114
1 December 1965
5 -19
December 1965
5-115
Original
5 -20 and 5 -20A
June 1970
5 -116
1 December 1965
5-20B Blank
December 1965
5 -11 7 thru 5 -121
Original
5-21
February 1969
5-122 and 5-122A
1 December 1965
5-22
Original
5 -122B Blank
1 December 1965
5 -23 and 5 -24
1 February 1969
5 -123
I December 1965
5 -25 thru 5 -31
Original
5 -124 thru 5 -1 26
Original
5 -32 and 5 -33
1 February 1969
5-127
1 February 1969
5-34
Original
5-128
Original
5 -35
1 February 1969
5 -129
1 June 1970
5 -36 and 5 -37
Original
5 -130 and 5 -130A
1 February 1969
5-38
1 December 1965
5 -130B Blank
1 February 1969
5,-39
Original
5 -131
Original
5-40
1 December 1965
5 -132
1 June 1970
5 -41 thru 5 -44
Original
5 -133 thru 5 -137
Original
*5-45
1 February 1972
5 -138 thru 5 -140A
1 February 1969
5-46
Original
5 -140B Blank
1 February 1969
5 -47 thru 5 -48B
1 December 1965
5-141 and 5-142
Original
5 -49 thru 5 -5 2A
1 December 1965
5-143
1 December 1965
5-52B Blank
1 December 1965
5-144 thru 5-153
Original
5 -53
Original
5 -154
1 December 1965
5-54
1 February 1969
5-155 thru 5-159
Original
5-54A
1 December 1965
5-160 thru 5-163
1 December 1965
5-54B Blank
1 December 1965
5-164 and 5-165
1 June 1970
5 -55 and 5 -56
1 December 1965
5-166 and 5-167
1
December 1965
5 -57 thru 5 -60
Original
5 -168 and 5 -168A
February 1969
5 -61
thru 5-62A 1 February 1969
5 -168B Blank
February 1969
*The asterisk indicates pages revised.
added or deleted by current revision.
THE DE HAVILLAND AIRCRAFT OF CANADA LIMITED
C
DOWNSVIEW ONTARIO
Revised 1 February 1972
,
",
,
"-

DHC 4 CARIBOU MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
Insert this page and latest revised pages. Destroy superseded pages.
Page No.
Issue
Page No.
Issue
5-169 and 5-170
1 December
1965
*7 -20
1 February 1972
5-171 thru 5-173
1 June 1970
7 -21
June 1970
5-174 Blank 1 June 1970
7 -22
February 1969
6-1
15 July 1969
7 -22A
1 June 1970
6-2 Blank Original
7-22B Blank
1 February 1969
6-3 15 July 1969
7 -23
1 June 1970
6 -4 thru 6 -6B 1 December
1965
*7 -24 and 7 -24A
February 1972
6-7 1 December 1965
7-24B Blank
1 February 1969
6-8 thru 6-13 Original
7 -25
February 1969
6-14 1 December 1965
*7 -26 and 7 -26A
February 1972
6-15 thru 6-18 Original
*7 -26B Blank
February 1972
6-18A 15 July 1969
7 -27
1 June 1970
6-18B Blank 15 July 1969
*7 -28 and 7 -28A
1
February 1972
6-19
1 December 1965
7-28B Blank
1
February 1969
6-20
Original
7 -29 thru 7 -31
Original
6-21 and 6-22
1 December 1965 7 -32 and 7 -32A
1 February 1969
6-23 and 6-24
Original
7 -32B Blank
1 February 1969
6-25
15 July 1969
7 -33 thru 7 -34B
1 December 1965
6-26 thru 6-26B
1 December 1965
7 -35
Original
6-27 and 6-28
1 December 1965
*7 -36
1 February 1972
6-29
15 July 1969
7 -37
1
December 1965
6-30 and 6-30A
1 December 1965
7 -38
1
June 1970
6-30B
15 July 1969
'n -38A
1
February 1972
6-31 thru 6-32A
15 July 1969
7 -38B Blank
1 June 1970
6-32B Blank
15 July 1969
*7 -39
February 1972
6-33 and 6-34
1 December 1965
7 -40 and 7 -41
1 June 1970
6-34A
1 February 1969
7 -42
1 December 1965
6-34B Blank
1 December 1965
7 -43
1 February 1969
*6-35 and 6-36
1 February 1972
7 -44 thru 7 -47
Original
6-37
15 July 1969
*7 -48
1 February 1972
6-38 and 6-39
Original
7 -49 and 7 -50
Original
6-40 Blank
Original
7 -51
1 December 1965
*7 -1
1 February 1972
7 -52
Original
7 -2 and 7-3
1 June 1970
7 -53 thru 7 -57
1 December 1965
*7-4
1 February 1972
7 -58
Original
7 -5 thru 7-7
Original
*7 -59 thru 7 -60A
1 February 1972
7 -8 and 7-9
1 December 1965
*7 -60B Blank
February 1972
*7-10 and 7-10A
1 February 1972
7 -61
December 1965
*7 -lOB Blank
February 1972
7-62
February 1969
7 -11
February 1969
7 -63
Original
*7 -12
1 February 1972
7 -64 thru 7 -66
1 June 1970
7-12A
1 February 1969
7 -67 and 7 -68
Original
7 -12B Blank
1 February 1969
*7 -69
1 February 1972
7 -13 and 7 -14
Original
7 -70 and 7 -7 OA
February 1969
7 -15
1 June 1970
7 -70B Blank
1
February 1969
7-16 and 7-16A
1 February 1969
7 -71
February 1969
7-16B Blank
1 February 1969
7 -72 thru 7 - 75
Original
7 -17
Original
7 -76
1 February 1969
7 -1 8 and 7 -1 8A
1 December 1965
7 -77 and 7 -78
1 December 1965
7-18B Blank
1 December 1965
*7 -79 thru 7 -80A
February 1972
7 -19
Original
7-80B Blank
1 June 1970
*The asterisk indicates pages revised, added or deleted by current revision.
THE DE HAVILLAND AIRCRAFT OF CANADA LIMITED
Revised 1 February 1972
DOWNSVIEW ONTARIO
D
DHC 4 CARIBOU MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
Insert this page and latest revised pages. Destroy superseded pages.
Page No.
Issue
Page No.
Issue
5-169 and 5-170
1 December
1965
*7 -20
1 February 1972
5-171 thru 5-173
1 June 1970
7 -21
June 1970
5-174 Blank 1 June 1970
7 -22
February 1969
6-1
15 July 1969
7 -22A
1 June 1970
6-2 Blank Original
7-22B Blank
1 February 1969
6-3 15 July 1969
7 -23
1 June 1970
6 -4 thru 6 -6B 1 December
1965
*7 -24 and 7 -24A
February 1972
6-7 1 December 1965
7-24B Blank
1 February 1969
6-8 thru 6-13 Original
7 -25
February 1969
6-14 1 December 1965
*7 -26 and 7 -26A
February 1972
6-15 thru 6-18 Original
*7 -26B Blank
February 1972
6-18A 15 July 1969
7 -27
1 June 1970
6-18B Blank 15 July 1969
*7 -28 and 7 -28A
1
February 1972
6-19
1 December 1965
7-28B Blank
1
February 1969
6-20
Original
7 -29 thru 7 -31
Original
6-21 and 6-22
1 December 1965 7 -32 and 7 -32A
1 February 1969
6-23 and 6-24
Original
7 -32B Blank
1 February 1969
6-25
15 July 1969
7 -33 thru 7 -34B
1 December 1965
6-26 thru 6-26B
1 December 1965
7 -35
Original
6-27 and 6-28
1 December 1965
*7 -36
1 February 1972
6-29
15 July 1969
7 -37
1
December 1965
6-30 and 6-30A
1 December 1965
7 -38
1
June 1970
6-30B
15 July 1969
'n -38A
1
February 1972
6-31 thru 6-32A
15 July 1969
7 -38B Blank
1 June 1970
6-32B Blank
15 July 1969
*7 -39
February 1972
6-33 and 6-34
1 December 1965
7 -40 and 7 -41
1 June 1970
6-34A
1 February 1969
7 -42
1 December 1965
6-34B Blank
1 December 1965
7 -43
1 February 1969
*6-35 and 6-36
1 February 1972
7 -44 thru 7 -47
Original
6-37
15 July 1969
*7 -48
1 February 1972
6-38 and 6-39
Original
7 -49 and 7 -50
Original
6-40 Blank
Original
7 -51
1 December 1965
*7 -1
1 February 1972
7 -52
Original
7 -2 and 7-3
1 June 1970
7 -53 thru 7 -57
1 December 1965
*7-4
1 February 1972
7 -58
Original
7 -5 thru 7-7
Original
*7 -59 thru 7 -60A
1 February 1972
7 -8 and 7-9
1 December 1965
*7 -60B Blank
February 1972
*7-10 and 7-10A
1 February 1972
7 -61
December 1965
*7 -lOB Blank
February 1972
7-62
February 1969
7 -11
February 1969
7 -63
Original
*7 -12
1 February 1972
7 -64 thru 7 -66
1 June 1970
7-12A
1 February 1969
7 -67 and 7 -68
Original
7 -12B Blank
1 February 1969
*7 -69
1 February 1972
7 -13 and 7 -14
Original
7 -70 and 7 -7 OA
February 1969
7 -15
1 June 1970
7 -70B Blank
1
February 1969
7-16 and 7-16A
1 February 1969
7 -71
February 1969
7-16B Blank
1 February 1969
7 -72 thru 7 - 75
Original
7 -17
Original
7 -76
1 February 1969
7 -1 8 and 7 -1 8A
1 December 1965
7 -77 and 7 -78
1 December 1965
7-18B Blank
1 December 1965
*7 -79 thru 7 -80A
February 1972
7 -19
Original
7-80B Blank
1 June 1970
*The asterisk indicates pages revised, added or deleted by current revision.
THE DE HAVILLAND AIRCRAFT OF CANADA LIMITED
Revised 1 February 1972
DOWNSVIEW ONTARIO
D

DHC 4 CARIBOU MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
Insert this page and latest revised pages. Destroy superseded pages.
Page No. Issue Page No. Issue
7-81 thru 7-89
Original
9-54 and 9-55
Original
7-90
1 December 1965
9-56 and 9-57
1 June 1970
*7-91 thru 7-97
1 February 197Z
9-58
Original
7-98 Blank 1 December 1965
9-59
1 December 1965
*8-1
1 February 197Z
9-60
1 August 1963
8-Z Blank
Original
9-60A and 9-60B
1 February 1969
8-3 thru 8-5
Original
9-61 thru 9-68
1 December 1965
8-6 thru 8-8
1 December
1965
*A 1-1 thru AI-lOA
1 February 1972
8-9 thru 8-Z0
Original
*A1-10B Blank
1 February 197Z
8-Z1
Z5 July 1968
*A1-11 thru Al-16
1 February 1972
8-ZZ 1 June 1970
*AZ-1 thru AZ-4 1 February 1972
8-Z3
Original
A3-1 and A3-Z Z5 April 1967
8-Z4
1 December 1965
A3-3
1 March 1968
8-Z4A and 8-Z4B
1 June 1970
A3-4 Blank
Z5 April 1967
8-Z5 thru 8-z6C
Z5 JUly 1968
A3-5 thru A3-7
Z5 April 1967
8-Z6D Blank
Z5 July 1968
A3-8 Blank Z5 April 1967
9-1
Original
A3-9 thru A3-lZ Z5 April 1967
9-Z Blank
Original
*A3-13
1 February 1972
9-3
1 June 1970
A3-14 Z5 April 1967
9-4
15 July 1969
A3-15 1 February 1969
*9-5 thru 9-8
1 February 197Z
*A3-l6
1 February 1972
9-9
1 February 1969
A3-l7 and A3-18 1 February 1969
*9-10 thru 9-10B
1 February 197Z
A3-19 thru A3-Z1 Z5 April 1967
*9-11
1 February 1972
A3-ZZ
1 March 1968
9-1Z
1 August 1963
A3-23
25 April 1967
9-1ZA
1 February 1969
A3-24
1 February 1969
9-12B Blank
1 February 1969
A3-Z5 1 March 1968
9-13
1 June 1970
A3-26 and A3-27
1 February 1969
9-14 Blank
Original
A 3-28 and A 3-29 25 April 1967
9-15
Original
A3-30
1 February 1969
9-16 and 9-17
1 February 1969
A3-3l 1 March 1968
9-18
Original
A3-3Z thru A3-35
25 April 1967
9-19
15 July 1969
A3-36
1 February 1969
9-Z0 thru 9-22
1 December 1965
*A3-36A 1 February 1972
*9-ZZA
1 February 1972
A3-36BBlank
1 June 1970
9-2ZB Blank
1 February 1969
A3-37 and A3-38
25 April 1967
9-23 thru 9-29
1 December 1965
A3-39
1 February 1969
9-30 and 9-30A
1 February 1969
A3-40 Blank
25 April 1967
9-30B
1 December 1965
A3-41 Z5 April 1967
9-31 thru 9-34
1 December 1965
*A3-42 1 February 1972
9-34A
1 June 1970
A3-43 thru A3-45
25 April 1967
9-34B Blank
1 June 1970
*A3-46
1 February 1972
9-35
1 December
1965
A3-47 1 February 1969
9-36
1 June 1970
A3-48 Blank
25 April 1967
*9-37 thru 9-41
1 February 1972
A 3-49 thru A 3- 52 25 July 1968
9-42 and 9-43
1 June 1970
*A3-53 1 February 197Z
*9-44 thru 9-47
1 February 1972
A3-54 thru A3-72 25 July 1968
9-48
1 December 1965
A3-73 1 February 1969
*9-49
1 Feb.ruary 1972
*A3-74
1 February 1972
9-50
1 June 1970
9-51 and 9-52
1 December 1965
9-53
1 February 1969
*The asterisk indicates pages revised,
added or deleted by current revision.
THE DE HAVILLAND AIRCRAFT OF CANADA LIMITED
E
- - -- -- -- ---------~---
OOWNSVIEW ONTARIO
Revised 1 February 1972
'-.
DHC 4 CARIBOU MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
Insert this page and latest revised pages. Destroy superseded pages.
Page No. Issue Page No. Issue
7-81 thru 7-89
Original
9-54 and 9-55
Original
7-90
1 December 1965
9-56 and 9-57
1 June 1970
*7-91 thru 7-97
1 February 197Z
9-58
Original
7-98 Blank 1 December 1965
9-59
1 December 1965
*8-1
1 February 197Z
9-60
1 August 1963
8-Z Blank
Original
9-60A and 9-60B
1 February 1969
8-3 thru 8-5
Original
9-61 thru 9-68
1 December 1965
8-6 thru 8-8
1 December
1965
*A 1-1 thru AI-lOA
1 February 1972
8-9 thru 8-Z0
Original
*A1-10B Blank
1 February 197Z
8-Z1
Z5 July 1968
*A1-11 thru Al-16
1 February 1972
8-ZZ 1 June 1970
*AZ-1 thru AZ-4 1 February 1972
8-Z3
Original
A3-1 and A3-Z Z5 April 1967
8-Z4
1 December 1965
A3-3
1 March 1968
8-Z4A and 8-Z4B
1 June 1970
A3-4 Blank
Z5 April 1967
8-Z5 thru 8-z6C
Z5 JUly 1968
A3-5 thru A3-7
Z5 April 1967
8-Z6D Blank
Z5 July 1968
A3-8 Blank Z5 April 1967
9-1
Original
A3-9 thru A3-lZ Z5 April 1967
9-Z Blank
Original
*A3-13
1 February 1972
9-3
1 June 1970
A3-14 Z5 April 1967
9-4
15 July 1969
A3-15 1 February 1969
*9-5 thru 9-8
1 February 197Z
*A3-l6
1 February 1972
9-9
1 February 1969
A3-l7 and A3-18 1 February 1969
*9-10 thru 9-10B
1 February 197Z
A3-19 thru A3-Z1 Z5 April 1967
*9-11
1 February 1972
A3-ZZ
1 March 1968
9-1Z
1 August 1963
A3-23
25 April 1967
9-1ZA
1 February 1969
A3-24
1 February 1969
9-12B Blank
1 February 1969
A3-Z5 1 March 1968
9-13
1 June 1970
A3-26 and A3-27
1 February 1969
9-14 Blank
Original
A 3-28 and A 3-29 25 April 1967
9-15
Original
A3-30
1 February 1969
9-16 and 9-17
1 February 1969
A3-3l 1 March 1968
9-18
Original
A3-3Z thru A3-35
25 April 1967
9-19
15 July 1969
A3-36
1 February 1969
9-Z0 thru 9-22
1 December 1965
*A3-36A 1 February 1972
*9-ZZA
1 February 1972
A3-36BBlank
1 June 1970
9-2ZB Blank
1 February 1969
A3-37 and A3-38
25 April 1967
9-23 thru 9-29
1 December 1965
A3-39
1 February 1969
9-30 and 9-30A
1 February 1969
A3-40 Blank
25 April 1967
9-30B
1 December 1965
A3-41 Z5 April 1967
9-31 thru 9-34
1 December 1965
*A3-42 1 February 1972
9-34A
1 June 1970
A3-43 thru A3-45
25 April 1967
9-34B Blank
1 June 1970
*A3-46
1 February 1972
9-35
1 December
1965
A3-47 1 February 1969
9-36
1 June 1970
A3-48 Blank
25 April 1967
*9-37 thru 9-41
1 February 1972
A 3-49 thru A 3- 52 25 July 1968
9-42 and 9-43
1 June 1970
*A3-53 1 February 197Z
*9-44 thru 9-47
1 February 1972
A3-54 thru A3-72 25 July 1968
9-48
1 December 1965
A3-73 1 February 1969
*9-49
1 Feb.ruary 1972
*A3-74
1 February 1972
9-50
1 June 1970
9-51 and 9-52
1 December 1965
9-53
1 February 1969
*The asterisk indicates pages revised,
added or deleted by current revision.
THE DE HAVILLAND AIRCRAFT OF CANADA LIMITED
E
- - -- -- -- ---------~---
OOWNSVIEW ONTARIO
Revised 1 February 1972
'-.

T.R.
Ser. No.
1"" 15
"
'7
18
-
DHC-4 CARIBOU MAINTENANCE MANUAL
I TEMPORARY REVisION INDEX-l I
Insert following RECORD OF REVISIONS
Retain this index in the front of the manual. When Tem-
porary Revisions are issued or cancelled. enter the
relevant information in the columns below.
Date Date
Page
T.R. Date
Date
Inserted
Removed No.
Ser. No. Inserted
Removed
9 'JULY 11
J Frs. 71
VAl' OilS
',.S£P.73
2-209
14 SEP 73
2, - 2.10
Z fE.7+ 8 - 24
1 September 1970
Page
No.
T. R. Index
Page 1
T.R.
Ser. No.
1"" 15
"
'7
18
-
DHC-4 CARIBOU MAINTENANCE MANUAL
I TEMPORARY REVisION INDEX-l I
Insert following RECORD OF REVISIONS
Retain this index in the front of the manual. When Tem-
porary Revisions are issued or cancelled. enter the
relevant information in the columns below.
Date Date
Page
T.R. Date
Date
Inserted
Removed No.
Ser. No. Inserted
Removed
9 'JULY 11
J Frs. 71
VAl' OilS
',.S£P.73
2-209
14 SEP 73
2, - 2.10
Z fE.7+ 8 - 24
1 September 1970
Page
No.
T. R. Index
Page 1

--------- ------ ------- ----------------- ----- --------------- --- - --------- ------ ------- ----------------- ----- --------------- --- -

INTRODUCTION
This manual has been prepared by the De Havilland Aircraft of Canada Ltd. to assist
civil operators of the DHC-4A Caribou in the servicing and maintenance of the air-
craft and its equipment. Coverage is given to both the standard version of the aircraft
and available special order equipment. Alist covering the specialorder equipment is
included as Appendix II.
The main portion of the manual is divided into nine parts, each of which provides
comprehensive coverage of the systems and components contained within the part.
Each part is provided with a table of contents to locate the various systems and com-
ponents contained therein. A further breakdown of the text gives trouble shooting,
removal, installation, testing, etc., as applicable to the systems and components.
The need to use more than one part forrrl.aintenance of a particular system has been
kept to a minimum, but, where necessary, appropriate cross-references are made.
It will be noted that this manual does not deal fully with items of proprietary equip-
ment. It is suggested, therefore, that every use be made of the (wide range of)
literature available from the individual manufacturers; (to this end) a list of refer-
ence publications is included in Appendix I.
An inspection schedule is included in Appendix III.
The following manuals are considered essential to operations and should be carried
aboard the aircraft at all times:
DHC-4A Caribou Flight Manual
DHC-4A Caribou Maintenance Manual
Pratt and Whitney Engine Handbook
Hamilton Standard Propeller Manual
Aircraft Registration .._ ........•................................
Manufacturer's Serial No •••••••••••••••••••••••••••••••••••••••
Manual No ............................................•........
---~-.- ------ ------------.-!.---- -.---~------ ----------------'-----------~~,~-- ---------------
i
INTRODUCTION
This manual has been prepared by the De Havilland Aircraft of Canada Ltd. to assist
civil operators of the DHC-4A Caribou in the servicing and maintenance of the air-
craft and its equipment. Coverage is given to both the standard version of the aircraft
and available special order equipment. Alist covering the specialorder equipment is
included as Appendix II.
The main portion of the manual is divided into nine parts, each of which provides
comprehensive coverage of the systems and components contained within the part.
Each part is provided with a table of contents to locate the various systems and com-
ponents contained therein. A further breakdown of the text gives trouble shooting,
removal, installation, testing, etc., as applicable to the systems and components.
The need to use more than one part forrrl.aintenance of a particular system has been
kept to a minimum, but, where necessary, appropriate cross-references are made.
It will be noted that this manual does not deal fully with items of proprietary equip-
ment. It is suggested, therefore, that every use be made of the (wide range of)
literature available from the individual manufacturers; (to this end) a list of refer-
ence publications is included in Appendix I.
An inspection schedule is included in Appendix III.
The following manuals are considered essential to operations and should be carried
aboard the aircraft at all times:
DHC-4A Caribou Flight Manual
DHC-4A Caribou Maintenance Manual
Pratt and Whitney Engine Handbook
Hamilton Standard Propeller Manual
Aircraft Registration .._ ........•................................
Manufacturer's Serial No •••••••••••••••••••••••••••••••••••••••
Manual No ............................................•........
---~-.- ------ ------------.-!.---- -.---~------ ----------------'-----------~~,~-- ---------------
i

--------------------------------------

· ~"-
PART
PART
1
PART 2
PART 3
PART 4
PART 5
PART 6
PART 7
PART 8
PART 9
Table of Contents
T ABLE OF CONTENTS
TITLE PAGE
GENERAL INFORMATION. . • • . • • • • • . • • . . • • • • . • • • • . • . • 1-1
AIRFRAME . • • • • • . • • • . . . . . . . . . . . . . . . . . . . . • • • . . • . • • . . 2- 1
HYDRAULIC SYSTEM •..••••••.•.•.••••••••••••..•.• 3-1
UTILITY SYSTEMS. • • • • • • • • . • • • • • • • • • • • • • • • • . • • • . • . • 4-1
POWER PLANT AND RELATED SySTEMS............. 5-1
INSTRUMENTS. •• ••• •• • •• •• • •• • • • • • • •• • • . ••• • • • • • • • • 6-1
ELECTRICAL SySTEM.............................. 7-1
RADIO ....•..............•.•....... :............... 8-1
WIRING DATA...................................... 9-1
Appendix I Reference Publications
Appendix II Special Order Equipment
Appendix III Inspection Schedule
iii
· ~"-
PART
PART
1
PART 2
PART 3
PART 4
PART 5
PART 6
PART 7
PART 8
PART 9
Table of Contents
T ABLE OF CONTENTS
TITLE PAGE
GENERAL INFORMATION. . • • . • • • • • . • • . . • • • • . • • • • . • . • 1-1
AIRFRAME . • • • • • . • • • . . . . . . . . . . . . . . . . . . . . • • • . . • . • • . . 2- 1
HYDRAULIC SYSTEM •..••••••.•.•.••••••••••••..•.• 3-1
UTILITY SYSTEMS. • • • • • • • • . • • • • • • • • • • • • • • • • . • • • . • . • 4-1
POWER PLANT AND RELATED SySTEMS............. 5-1
INSTRUMENTS. •• ••• •• • •• •• • •• • • • • • • •• • • . ••• • • • • • • • • 6-1
ELECTRICAL SySTEM.............................. 7-1
RADIO ....•..............•.•....... :............... 8-1
WIRING DATA...................................... 9-1
Appendix I Reference Publications
Appendix II Special Order Equipment
Appendix III Inspection Schedule
iii

PART I
Part 1
Table of Contents
GENERAL INFORMATION
Paragraph
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1. 10
1.11
1. 12
1. 13
1. 14
1. 15
GENERAL
General Description ..••.•••......
Airframe Station Location ...•...•.
Access and Inspection
Provisions .•........•.....•....••
Winterization Kit ......•..........
GROUND HANDLING
Hoisting .....••..•.....•........
Jacking .•.•.....................
Leveling ....•....................
Parking •............••...•......
Landing Gear Ground Locks ...... .
Mooring •...........•...........•
Covers •....•.......... , ....•...•
Towing .....••............•....••
External Power Receptacle ....... .
Hydraulic Ground Test
Connections •............•.......
Winter Operation Ground
Handling .....................•..
Revised 1 December 1965
--- -------------_._-_._-
Page
1-3
1-3
1-3
1-3
1-7
1-12
1-12
1-12
1-14
1-14
1-16
1-16
1-19
1-19
1-19
Paragraph ............................ Page
1. 16
1. 17
1. 18
l. 19
1. 20
1. 21
1. 22
1. 23
1. 24
1. 25
1. 26
1. 27
SERVICING
Fuel System ..............•...... 1-19
Oil System ...................... 1-23
Hydraulic System ................ 1-23
Emergency Air Bottles ........... 1-24
Landing Gear Shock Struts ......... 1-24
Tires ........................... 1-25
Changing Main Wheels ............ 1-26
Changing a Nosewheel ............ 1-26
De-icing System .................. 1-27
Oxygen System .... . . . . . . . . . . . . . .. 1- 27
Aircraft Battery. . . . . . . . . . . . . . . . .. 1-27
Pitot-Static and Thrust
Indicating Systems ................ 1-28
1. 27A Reversible Propeller I
.. Hydraulic System ................ 1-28
1. 28 Lubrication ...................... 1-28
1.29 Cleaning ........................ 1-28
SPECIAL TOOLS AND EQUIPMENT
1.30 General ......................... 1-33
1-1
---- .-- _._-----_._-------------_._._-----
PART I
Part 1
Table of Contents
GENERAL INFORMATION
Paragraph
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1. 10
1.11
1. 12
1. 13
1. 14
1. 15
GENERAL
General Description ..••.•••......
Airframe Station Location ...•...•.
Access and Inspection
Provisions .•........•.....•....••
Winterization Kit ......•..........
GROUND HANDLING
Hoisting .....••..•.....•........
Jacking .•.•.....................
Leveling ....•....................
Parking •............••...•......
Landing Gear Ground Locks ...... .
Mooring •...........•...........•
Covers •....•.......... , ....•...•
Towing .....••............•....••
External Power Receptacle ....... .
Hydraulic Ground Test
Connections •............•.......
Winter Operation Ground
Handling .....................•..
Revised 1 December 1965
--- -------------_._-_._-
Page
1-3
1-3
1-3
1-3
1-7
1-12
1-12
1-12
1-14
1-14
1-16
1-16
1-19
1-19
1-19
Paragraph ............................ Page
1. 16
1. 17
1. 18
l. 19
1. 20
1. 21
1. 22
1. 23
1. 24
1. 25
1. 26
1. 27
SERVICING
Fuel System ..............•...... 1-19
Oil System ...................... 1-23
Hydraulic System ................ 1-23
Emergency Air Bottles ........... 1-24
Landing Gear Shock Struts ......... 1-24
Tires ........................... 1-25
Changing Main Wheels ............ 1-26
Changing a Nosewheel ............ 1-26
De-icing System .................. 1-27
Oxygen System .... . . . . . . . . . . . . . .. 1- 27
Aircraft Battery. . . . . . . . . . . . . . . . .. 1-27
Pitot-Static and Thrust
Indicating Systems ................ 1-28
1. 27A Reversible Propeller I
.. Hydraulic System ................ 1-28
1. 28 Lubrication ...................... 1-28
1.29 Cleaning ........................ 1-28
SPECIAL TOOLS AND EQUIPMENT
1.30 General ......................... 1-33
1-1
---- .-- _._-----_._-------------_._._-----

....
I
N
I'%j
....
(JQ
C
'1
(1)
....
I
tJ)
...
III
...
....
0
::1 Ul
t::l
....
III
(JQ
'1
III
S
I
•
~
n
t>07
K"'"'~~~~~'l
'I\~~y\
\
j/\
/J;;ii'--'
93.00
I
___
...
a_
._A_
f"
\
~
1
l~
4~.OO
'"d
III
'1
...
....
I
N
I'%j
....
(JQ
C
'1
(1)
....
I
tJ)
...
III
...
....
0
::1 Ul
t::l
....
III
(JQ
'1
III
S
I
•
~
n
t>07
K"'"'~~~~~'l
'I\~~y\
\
j/\
/J;;ii'--'
93.00
I
___
...
a_
._A_
f"
\
~
1
l~
4~.OO
'"d
III
'1
...

GENERAL
1. 1 GENERAL DESCRIPTION
T.he DHC -4 Caribou, manufactured by
The de Havilland Aircraft of Canada Limited,
is an all metal, high wing monoplane, powered
by two Pratt and Whitney Twin Wasp engines
.driving either nonreversible or reversible pitch,
Hamilton Standard, fully feathering, constant-
speed propellers. It is designed for passenger
or general cargo carrying, for ambulance and
rescue work, and for aerial supply dropping.
Wide, power-operated cargo and ramp doors and
an upswept rear fuselage permit direct cargo
loading either up the ramp or at truck-bed level.
The retractable tricycle landing gear has a steer-
able nosewheel.
1.2 :AIRFRAME STATION LOCATION
The station~ diagram, figure I-I, shows
the location of structural members of the aircraft.
Station zero of the fuselage is 93.0 inches forward
of the jig point, marked by a plate attached to the
underside of the fuselage at the centerline. Station
zero of the wings, stabilizer, and elevators is the
centerline of the aircraft.
1. 3 ACCESS AND INSPECTION PROVISIONS
Removable panels and doors necessary
for access to equipment for inspection and main-
tenance purposes are indicated in figure 1-2. Up-
holstery is removable in all places where access
isnecessaryfor maintenance. Note the following:
a. Access items 21, figure 1-2, are notremov-
able panels, being attached by screws at their
lower edges only. To gain access to equipment be-
hind each of these panels, remove screws, and
pry and wedge open lower edge of panel.
b. Access items 82, figure 1-2, are secured by
Cherry blind rivets which must be drilled out
using a No. 30 (0.128-inch) drill.
c. When Mod 4/1174 is incorporated, a fire
access to each accessories compartment is pro-
vided which also serves as a preheat attachment
for a special order winterization kit engine pre-
heat duct.
d. When Mod 4/1184 is incorporated, additional
wing access openings (27, 28, 31 and 80) are pro-
vided to give improved access to the aileron
cables, pulleys, and fairleads in the outer wing.
Note
The main access panels on the outer wing
lower surfaces are not interchangeable one
with the other, nor are they reversible. The
left wing panels are numbered for identifi-
Revised 1 December 1965
Part 1
Paragraphs 1. 1 to 1. 4
cation on their inside faces Ll through L14
from inboard to outboard, and similarly the
right wing panels from Rl through RH. An
arrow indicates the forward edge of each
panel.
Before refitting access panels, check for in-
ternal cleanliness to insure that no tools,
locking wire, etc., have been left inside the
structure. Also check that fuel drain valves
are wirelocked in the closed position.
e. When Mod 4/1243 is incorporated, a nose gear I
observation window (44A) is provided for inspec-
tion of the nose gear in flight.
1.3.1 Close engine cowlings in the following
sequence:
a. Check that carburetor air intake is clear and
then close top cowling.
b. Close side cowling.
c. Inspect firewall seal and insure that it is
properly seated in channel.
d. Close bottom cowling.
Exercise extreme care when clOSing the
engine cowlings to insure that the firewall
seal is properly seated to preclude abnor-
mal engine cooling and undue stress on the
auxiliary firewall.
1.4 WINTERIZATION KIT
A special order winterization kit is avail-
able for installation and use (if Mod 4/1174 is
embodied) when operating the aircraft at ex-
tremely low temperatures. The winterization kit
comprises two hot fuel priming units (one for each
engine) and associated lines and controls, two
heavy duty fans for the cabin heating system,
ducts for preheating the engines and accessories
compartments from the cabin heating system,
and a number of additional aircraft covers. The
hot fuel priming system, the heavy duty fans, and
three covers for the hot day ventilation outlets in
the cabin roof shall be installed before commenc-
ing operation of the aircraft in extremely cold
temperatures, and shall remain installed for the
duration of such operations. The preheat ducts and
covers shall be retained at the site of operation as
additional items of ground equipment. Refer to
paragraph 1.11 for information on covers, para-
graph 1.15 for winter operation ground handling,
paragraph 5.98 for hot fuel priming system, and
paragraph 4.56 for winterized cabin heating sys-
tem.
1-3
GENERAL
1. 1 GENERAL DESCRIPTION
T.he DHC -4 Caribou, manufactured by
The de Havilland Aircraft of Canada Limited,
is an all metal, high wing monoplane, powered
by two Pratt and Whitney Twin Wasp engines
.driving either nonreversible or reversible pitch,
Hamilton Standard, fully feathering, constant-
speed propellers. It is designed for passenger
or general cargo carrying, for ambulance and
rescue work, and for aerial supply dropping.
Wide, power-operated cargo and ramp doors and
an upswept rear fuselage permit direct cargo
loading either up the ramp or at truck-bed level.
The retractable tricycle landing gear has a steer-
able nosewheel.
1.2 :AIRFRAME STATION LOCATION
The station~ diagram, figure I-I, shows
the location of structural members of the aircraft.
Station zero of the fuselage is 93.0 inches forward
of the jig point, marked by a plate attached to the
underside of the fuselage at the centerline. Station
zero of the wings, stabilizer, and elevators is the
centerline of the aircraft.
1. 3 ACCESS AND INSPECTION PROVISIONS
Removable panels and doors necessary
for access to equipment for inspection and main-
tenance purposes are indicated in figure 1-2. Up-
holstery is removable in all places where access
isnecessaryfor maintenance. Note the following:
a. Access items 21, figure 1-2, are notremov-
able panels, being attached by screws at their
lower edges only. To gain access to equipment be-
hind each of these panels, remove screws, and
pry and wedge open lower edge of panel.
b. Access items 82, figure 1-2, are secured by
Cherry blind rivets which must be drilled out
using a No. 30 (0.128-inch) drill.
c. When Mod 4/1174 is incorporated, a fire
access to each accessories compartment is pro-
vided which also serves as a preheat attachment
for a special order winterization kit engine pre-
heat duct.
d. When Mod 4/1184 is incorporated, additional
wing access openings (27, 28, 31 and 80) are pro-
vided to give improved access to the aileron
cables, pulleys, and fairleads in the outer wing.
Note
The main access panels on the outer wing
lower surfaces are not interchangeable one
with the other, nor are they reversible. The
left wing panels are numbered for identifi-
Revised 1 December 1965
Part 1
Paragraphs 1. 1 to 1. 4
cation on their inside faces Ll through L14
from inboard to outboard, and similarly the
right wing panels from Rl through RH. An
arrow indicates the forward edge of each
panel.
Before refitting access panels, check for in-
ternal cleanliness to insure that no tools,
locking wire, etc., have been left inside the
structure. Also check that fuel drain valves
are wirelocked in the closed position.
e. When Mod 4/1243 is incorporated, a nose gear I
observation window (44A) is provided for inspec-
tion of the nose gear in flight.
1.3.1 Close engine cowlings in the following
sequence:
a. Check that carburetor air intake is clear and
then close top cowling.
b. Close side cowling.
c. Inspect firewall seal and insure that it is
properly seated in channel.
d. Close bottom cowling.
Exercise extreme care when clOSing the
engine cowlings to insure that the firewall
seal is properly seated to preclude abnor-
mal engine cooling and undue stress on the
auxiliary firewall.
1.4 WINTERIZATION KIT
A special order winterization kit is avail-
able for installation and use (if Mod 4/1174 is
embodied) when operating the aircraft at ex-
tremely low temperatures. The winterization kit
comprises two hot fuel priming units (one for each
engine) and associated lines and controls, two
heavy duty fans for the cabin heating system,
ducts for preheating the engines and accessories
compartments from the cabin heating system,
and a number of additional aircraft covers. The
hot fuel priming system, the heavy duty fans, and
three covers for the hot day ventilation outlets in
the cabin roof shall be installed before commenc-
ing operation of the aircraft in extremely cold
temperatures, and shall remain installed for the
duration of such operations. The preheat ducts and
covers shall be retained at the site of operation as
additional items of ground equipment. Refer to
paragraph 1.11 for information on covers, para-
graph 1.15 for winter operation ground handling,
paragraph 5.98 for hot fuel priming system, and
paragraph 4.56 for winterized cabin heating sys-
tem.
1-3

-
I
~
:;0
(1)
<!
.....
til
(1)
p.
t!
(1)
()
(1)
~
(1)
.,
-.0
0'
\}1
:.:.!
(JQ
~ .,
(1)
I
N
»
()
()
(1)
til til
Pl
P P.
......
P
til
"0
(1)
()
.....
.....
0
p
'l:1
.,
0
<!
.....
til
.....
0
P
til
Ui
p-
(1)
(1)
.....
0
....,
N
..
l:
n
N
..
~
..
WALKWAYS
EXTERNAL
ACCESS
OPENINGS
INTERNAL
ACCESS
OPENINGS
AND
OPENINGS
OBSCURED
BY
STRUCTURE
*"
TO
INDICATE THAT
AN
IDENTICAL
ACCESS
IS
LOCATED
IN
SIMILAR
POSITION
ON
OPPOSITE
SIDE
OF
AIRCRAFT
1:)
Pl
.,
.....
-
I
~
:;0
(1)
<!
.....
til
(1)
p.
t!
(1)
()
(1)
~
(1)
.,
-.0
0'
\}1
:.:.!
(JQ
~ .,
(1)
I
N
»
()
()
(1)
til til
Pl
P P.
......
P
til
"0
(1)
()
.....
.....
0
p
'l:1
.,
0
<!
.....
til
.....
0
P
til
Ui
p-
(1)
(1)
.....
0
....,
N
..
l:
n
N
..
~
..
WALKWAYS
EXTERNAL
ACCESS
OPENINGS
INTERNAL
ACCESS
OPENINGS
AND
OPENINGS
OBSCURED
BY
STRUCTURE
*"
TO
INDICATE THAT
AN
IDENTICAL
ACCESS
IS
LOCATED
IN
SIMILAR
POSITION
ON
OPPOSITE
SIDE
OF
AIRCRAFT
1:)
Pl
.,
.....

I
\]1
"'l
.....
OQ
~
'1
CD
.....
I
IV
>
(l (l
CD
Ul Ul
III
;:l
0.
......
;:l
Ul
't:l
CD
(l
...
.....
0
;:l
"0
'1
0
<
.....
Ul
.....
0
;:l
Ul
Ui
::r
CD
CD
...
IV
0
.....
IV
•
3:
n
...
(
,
52*
51
~
EXTERNAL
ACCESS
OPENINGS
_
INTERNAL
ACCESS
OPENINGS
ANP
OPENINGS
OBSCURED
BY
STRUCTURE
*
TO
INDICATE
THAT
AN
IDENTICAL
ACCESS
IS
LOCATED
IN
SIMILAR
POSITION
ON
OPPOSITE
SIDE
OF
AIRCRAFT
82*
)Q
81
"
"0
III
'1
...
I
\]1
"'l
.....
OQ
~
'1
CD
.....
I
IV
>
(l (l
CD
Ul Ul
III
;:l
0.
......
;:l
Ul
't:l
CD
(l
...
.....
0
;:l
"0
'1
0
<
.....
Ul
.....
0
;:l
Ul
Ui
::r
CD
CD
...
IV
0
.....
IV
•
3:
n
...
(
,
52*
51
~
EXTERNAL
ACCESS
OPENINGS
_
INTERNAL
ACCESS
OPENINGS
ANP
OPENINGS
OBSCURED
BY
STRUCTURE
*
TO
INDICATE
THAT
AN
IDENTICAL
ACCESS
IS
LOCATED
IN
SIMILAR
POSITION
ON
OPPOSITE
SIDE
OF
AIRCRAFT
82*
)Q
81
"
"0
III
'1
...

Part 1
1.
2.
3.
4.
5.
6.
7.
B.
9.
10.
11.
12.
13.
14.
15.
16.
17.
lB.
19.
20.
21.
22.
23.
24.
25.
26.
27.
2B.
29.
30.
31.
32.
1-6
Key to Figure 1-2. Access and Inspection Provisions
Navigation Light TerIninals
Fuel Filler Cap
Wing Center Section Internal Structure
(Landing Gear Area)
Wing Flap Push-Pull Rod Draft Excluder
Fire Extinguisher Piping
Heater Fuel Lines and Heater Ducts
Vertical Stabilizer AttachInent Bolts
Rudder TriIn Cables
Rudder TriIn Tab Actuator
OInni Antenna
Rudder Balance We ight
Anti-Collision Light TerIninals
Rudder Top Hinge
Rudder TriIn Tab Bellcrank
Rudder Center Hinge
Elevator TriIn Cables Fairlead
Elevator TriIn Pulley
Elevator TriIn Tab Actuator
Horizontal Stabili ze r De -icing Connections
Rudder BottOIn Hinge and Spring Tab
MechanisIn
Cargo Door Jettison MechanisIn
Ail.eron Quadrant and Gust Lock
Gust Lock Cables
Flap Push-Pull Rods
Fire Extinguisher Piping
Heater Ducts
De -icing Line s
Wing Flap Position Indicator SysteIn Cable
Fuel Tank Crossfeed Valve (Left Side) Fuel
Tank Crossfeed Line (Right Side)
Aileron-Rudder Interconnect Cables
(Right Side)
Oil Cooler Vent Door Actuator Linkage
(If Fitted)
Engine Exhaust AugInentor Tube Attach-
Inents and Engine Sling Rear Pickup
Engine Exhaust AugInentor Tube
AttachInents
Wing Joint Top AttachInent Bolts
De-icing Lines
Electrical Cables
Aileron Cable~
Aileron Cables
Aileron Cables Fairlead
De-icing Lines
Lift Transducer
Electrical Cables
Carburetor Vapor Vent Line
Aileron Cables Fairlead
Aileron Cables
Aileron Cables Fairlead
Propeller De-icing Tank, PUInP and Filter
Leading Edge De-icing Lines
Wing Joint Front Spar AttachInent Bolts
Wing Electrics
Carburetor Vapor Vent Line
33.
34.
35.
36.
37.
3B.
39.
40.
41.
42.
43.
44.
44A.
45.
46.
47.
4B.
49.
50.
51.
52.
53.
54.
55.
56.
57.
5B.
59.
60.
61.
De-icing Tank Filler Cap
Leading Edge - Spar AttachInent Bolts
Oil Tank Filler Cap
Leading Edge - Spar AttachInent Bolts
Oil Tank Dipstick
Leading Edge - Nacelle AttachInent
Bolts
Cowling Hinge
Accessories COInpartInent Fire Access
Engine Preheat Duct AttachInent
Engine and Accessories
Oil Cooler
Fuselage Roof Access Steps
Carburetor Air Mixing Valves
Wing Inspection Light TerIninals (Outboard
Access Only, Inboard Blank)
Carburetor RaIn Air Valve Linkage
Carburetor Air Valves Actuators
Nose Gear Observation Window (Mod 4/ 1243) •
Flight Control COInponents Below Flight
COInpartInent Floor
Electrical Junction Boxes
Hydraulic COInponents
Pitot·Static SysteIn COInponents
Wheel Brake Emergency Air Bottle,
Hydraulic Accumulator, Charging Valves
and Indicators
Hydraulic Ground Test Connections
Components Below Flight Compt Floor
Hydraulic EInergency Selector Panel
Elevator TriIn Tab Handwheel Pedestal
AttachInent Bolts
Hydraulic HandpuInp Handle Socket
Nosewheel Steering Pulleys
Nose Gear Pivot Points
Heater Ducts
Rudder and Wheel Brake Controls
InstruInents Wiring and Hoses
Windshield Wiper SysteIn COInponents
Flight COInpartInent Heater Package and
Ducts
Electrical Junction Box
De-icing Lines
Aileron TriIn Tab Actuator and TransInitter
Wing Tip - Spar AttachInent Screws
Outboard Aileron Bellcrank
Outboard Flap Bellcrank
Aileron Cable Pulley and Fairlead
NUInber 10 Fuel Cell and SUInP Plate
NUInber 9 Fuel Cell, SUInP Plate and Tank
Unit
Wing Flap Push-Pull Rod Idler
Aileron Cables Fairlead
NUInber B Fuel Cell and Sump Plate
NUInber 7 Fuel Cell and Sump Plate
NUInber 6 Fuel Cell, SUInP Plate, and
~ Tank Unit
Mid Flap and Mid Aileron Bellcranks
Revised 1 December 1965
Part 1
1.
2.
3.
4.
5.
6.
7.
B.
9.
10.
11.
12.
13.
14.
15.
16.
17.
lB.
19.
20.
21.
22.
23.
24.
25.
26.
27.
2B.
29.
30.
31.
32.
1-6
Key to Figure 1-2. Access and Inspection Provisions
Navigation Light TerIninals
Fuel Filler Cap
Wing Center Section Internal Structure
(Landing Gear Area)
Wing Flap Push-Pull Rod Draft Excluder
Fire Extinguisher Piping
Heater Fuel Lines and Heater Ducts
Vertical Stabilizer AttachInent Bolts
Rudder TriIn Cables
Rudder TriIn Tab Actuator
OInni Antenna
Rudder Balance We ight
Anti-Collision Light TerIninals
Rudder Top Hinge
Rudder TriIn Tab Bellcrank
Rudder Center Hinge
Elevator TriIn Cables Fairlead
Elevator TriIn Pulley
Elevator TriIn Tab Actuator
Horizontal Stabili ze r De -icing Connections
Rudder BottOIn Hinge and Spring Tab
MechanisIn
Cargo Door Jettison MechanisIn
Ail.eron Quadrant and Gust Lock
Gust Lock Cables
Flap Push-Pull Rods
Fire Extinguisher Piping
Heater Ducts
De -icing Line s
Wing Flap Position Indicator SysteIn Cable
Fuel Tank Crossfeed Valve (Left Side) Fuel
Tank Crossfeed Line (Right Side)
Aileron-Rudder Interconnect Cables
(Right Side)
Oil Cooler Vent Door Actuator Linkage
(If Fitted)
Engine Exhaust AugInentor Tube Attach-
Inents and Engine Sling Rear Pickup
Engine Exhaust AugInentor Tube
AttachInents
Wing Joint Top AttachInent Bolts
De-icing Lines
Electrical Cables
Aileron Cable~
Aileron Cables
Aileron Cables Fairlead
De-icing Lines
Lift Transducer
Electrical Cables
Carburetor Vapor Vent Line
Aileron Cables Fairlead
Aileron Cables
Aileron Cables Fairlead
Propeller De-icing Tank, PUInP and Filter
Leading Edge De-icing Lines
Wing Joint Front Spar AttachInent Bolts
Wing Electrics
Carburetor Vapor Vent Line
33.
34.
35.
36.
37.
3B.
39.
40.
41.
42.
43.
44.
44A.
45.
46.
47.
4B.
49.
50.
51.
52.
53.
54.
55.
56.
57.
5B.
59.
60.
61.
De-icing Tank Filler Cap
Leading Edge - Spar AttachInent Bolts
Oil Tank Filler Cap
Leading Edge - Spar AttachInent Bolts
Oil Tank Dipstick
Leading Edge - Nacelle AttachInent
Bolts
Cowling Hinge
Accessories COInpartInent Fire Access
Engine Preheat Duct AttachInent
Engine and Accessories
Oil Cooler
Fuselage Roof Access Steps
Carburetor Air Mixing Valves
Wing Inspection Light TerIninals (Outboard
Access Only, Inboard Blank)
Carburetor RaIn Air Valve Linkage
Carburetor Air Valves Actuators
Nose Gear Observation Window (Mod 4/ 1243) •
Flight Control COInponents Below Flight
COInpartInent Floor
Electrical Junction Boxes
Hydraulic COInponents
Pitot·Static SysteIn COInponents
Wheel Brake Emergency Air Bottle,
Hydraulic Accumulator, Charging Valves
and Indicators
Hydraulic Ground Test Connections
Components Below Flight Compt Floor
Hydraulic EInergency Selector Panel
Elevator TriIn Tab Handwheel Pedestal
AttachInent Bolts
Hydraulic HandpuInp Handle Socket
Nosewheel Steering Pulleys
Nose Gear Pivot Points
Heater Ducts
Rudder and Wheel Brake Controls
InstruInents Wiring and Hoses
Windshield Wiper SysteIn COInponents
Flight COInpartInent Heater Package and
Ducts
Electrical Junction Box
De-icing Lines
Aileron TriIn Tab Actuator and TransInitter
Wing Tip - Spar AttachInent Screws
Outboard Aileron Bellcrank
Outboard Flap Bellcrank
Aileron Cable Pulley and Fairlead
NUInber 10 Fuel Cell and SUInP Plate
NUInber 9 Fuel Cell, SUInP Plate and Tank
Unit
Wing Flap Push-Pull Rod Idler
Aileron Cables Fairlead
NUInber B Fuel Cell and Sump Plate
NUInber 7 Fuel Cell and Sump Plate
NUInber 6 Fuel Cell, SUInP Plate, and
~ Tank Unit
Mid Flap and Mid Aileron Bellcranks
Revised 1 December 1965

Part 1
Paragraphs 1.4. 1 to 1.5.1
Key to Figure 1-2. Access and Inspection Provisions (Cont)
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
Number 5 Fuel Cell, Sump Plate, and
Tank Unit
Numbe r 4 Fuel Cell and Sump Plate
Number 3 Fuel Cell and Sump Plate
Number 2 Fuel Cell, Sump Plate, and
Tank Unit
Number 1 Fuel Cell and Sump Plate
(Booster Pump, Tank Unit and Drain
Valve)
Inboard Flap Bellcrank
Flap Push-pull Rods
Aileron Pulleys
Fuel Selector Valve and Vent Lines
Heater Fuel Pump and Filter (Right Wing
Only)
Root Flap Bellcrank
Flap Push-Pull Rods
Aileron Cables
Fire Extinguisher Bottle and Piping
De-icing Lines
Heater Duct
Engine Control Cables
Electrical Wiring
Hydraulic and Instrument Air Lines
Hydraulic Emergency Shutoff Valve and
Hydraulic Pressure Switch
Electronic Equipment
Flight Compartment Floor Hatch Micro-
switch, Latch Plate and Light
Nose Gear Down Emergency Air Indica-
tor Inspection Window
Note
Winterization of the cabin heating system is
possible only when the special order cabin
heating ground and flight system is installed.
1.4.1 CONVERSION OF AIRCRAFT TO WINTER-
IZED STATE. Conversion of aircraft to winter-
ized state consists of installing a hot fuel priming
system for each engine, replacing the cabin heater
fans (of the special order cabin heating ground and
flight system) with heavy duty fans, arid installing
covers to the hot day ventilation outlets in the
cabin roof. For these procedures refer to para-
graphs 5. 98.2 and 4.56.2.
1.4.2 CONVERSION OF WINTERIZED AIRCRAFT
TO PREWINTERIZED STATE. To convert a
winterized aircraft back to its prewinterized state,
remove hot fuel priming systems and connect nor-
mal priming systems, replace heavy duty cabin
73.
74.
75.
76.
77.
78.
79.
80.
Sl.
82.
83.
84.
85.
86.
87.
88.
89.
90.
91.
92.
93.
Electrical Junction Box
Components Below Flight Compartment
Floor
Nose Gear Pivot Points
Nose Gear Door Actuating Mechanism
Nose Gear Drag Strut, Hydraulic Line s,
and Emergency Lowering Equipment
Battery and Sump Jar
Engine Drain and Breather Box
Outer Wing Fixed Leading Edge Attachment
Bolts
Aileron Cables Pulley
Radio Compass Transmitter
Fuel Connections to Cell 1
External Power Receptacle (Left Side)
Vertical and Horizontal Stabilizer Attach-
ment Bolts
Elevator Trim Cables
De-icing Lines
Rudder Cable - Operating Lever Attachment
Rudder Trim Control Pulley
Rudder Trim Electrical Cables
Elevator Hinge Bolts
Horizontal Stabilizer Leading Edge Out-
board Attachment Bolts
Wing Joint Bottom Attachment Bolts
Wing Joint Rear Spar Attachment Bolts
Wing Joint Fuel Connections
Aileron - Rudder Interconnect Cable
Aileron - Rudder Interconnect Bellcrank
Aileron - Rudder Interconnect Pulley
heater fans with normal fans, and remove covers
from hot day ventilation outlets in cabin roof. For
these procedures, refer to paragraphs 5.98.3 and
4.56.4.
GROUND HANDLING
1.5 HOISTING
Hoisting is accomplished by attaching
special slings to components and lifting by crane.
Because of the height of the empennage, itmay be
necessary to sling a crane in the hangar roof to
hoist empennage units. Outer wing and elevator
sling attachment holes are sealed by fabric
patches cemented in place with adhesive, Bostik
1142.
1.5.1 APPROXIMATE WEIGHTS OF COMPON-
ENTS. Approximate weights of components that
require hoisting by mechanical means are given
in Table 1-1, as a guide to the nominal capacity
of the crane required.
1-7
Part 1
Paragraphs 1.4. 1 to 1.5.1
Key to Figure 1-2. Access and Inspection Provisions (Cont)
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
Number 5 Fuel Cell, Sump Plate, and
Tank Unit
Numbe r 4 Fuel Cell and Sump Plate
Number 3 Fuel Cell and Sump Plate
Number 2 Fuel Cell, Sump Plate, and
Tank Unit
Number 1 Fuel Cell and Sump Plate
(Booster Pump, Tank Unit and Drain
Valve)
Inboard Flap Bellcrank
Flap Push-pull Rods
Aileron Pulleys
Fuel Selector Valve and Vent Lines
Heater Fuel Pump and Filter (Right Wing
Only)
Root Flap Bellcrank
Flap Push-Pull Rods
Aileron Cables
Fire Extinguisher Bottle and Piping
De-icing Lines
Heater Duct
Engine Control Cables
Electrical Wiring
Hydraulic and Instrument Air Lines
Hydraulic Emergency Shutoff Valve and
Hydraulic Pressure Switch
Electronic Equipment
Flight Compartment Floor Hatch Micro-
switch, Latch Plate and Light
Nose Gear Down Emergency Air Indica-
tor Inspection Window
Note
Winterization of the cabin heating system is
possible only when the special order cabin
heating ground and flight system is installed.
1.4.1 CONVERSION OF AIRCRAFT TO WINTER-
IZED STATE. Conversion of aircraft to winter-
ized state consists of installing a hot fuel priming
system for each engine, replacing the cabin heater
fans (of the special order cabin heating ground and
flight system) with heavy duty fans, arid installing
covers to the hot day ventilation outlets in the
cabin roof. For these procedures refer to para-
graphs 5. 98.2 and 4.56.2.
1.4.2 CONVERSION OF WINTERIZED AIRCRAFT
TO PREWINTERIZED STATE. To convert a
winterized aircraft back to its prewinterized state,
remove hot fuel priming systems and connect nor-
mal priming systems, replace heavy duty cabin
73.
74.
75.
76.
77.
78.
79.
80.
Sl.
82.
83.
84.
85.
86.
87.
88.
89.
90.
91.
92.
93.
Electrical Junction Box
Components Below Flight Compartment
Floor
Nose Gear Pivot Points
Nose Gear Door Actuating Mechanism
Nose Gear Drag Strut, Hydraulic Line s,
and Emergency Lowering Equipment
Battery and Sump Jar
Engine Drain and Breather Box
Outer Wing Fixed Leading Edge Attachment
Bolts
Aileron Cables Pulley
Radio Compass Transmitter
Fuel Connections to Cell 1
External Power Receptacle (Left Side)
Vertical and Horizontal Stabilizer Attach-
ment Bolts
Elevator Trim Cables
De-icing Lines
Rudder Cable - Operating Lever Attachment
Rudder Trim Control Pulley
Rudder Trim Electrical Cables
Elevator Hinge Bolts
Horizontal Stabilizer Leading Edge Out-
board Attachment Bolts
Wing Joint Bottom Attachment Bolts
Wing Joint Rear Spar Attachment Bolts
Wing Joint Fuel Connections
Aileron - Rudder Interconnect Cable
Aileron - Rudder Interconnect Bellcrank
Aileron - Rudder Interconnect Pulley
heater fans with normal fans, and remove covers
from hot day ventilation outlets in cabin roof. For
these procedures, refer to paragraphs 5.98.3 and
4.56.4.
GROUND HANDLING
1.5 HOISTING
Hoisting is accomplished by attaching
special slings to components and lifting by crane.
Because of the height of the empennage, itmay be
necessary to sling a crane in the hangar roof to
hoist empennage units. Outer wing and elevator
sling attachment holes are sealed by fabric
patches cemented in place with adhesive, Bostik
1142.
1.5.1 APPROXIMATE WEIGHTS OF COMPON-
ENTS. Approximate weights of components that
require hoisting by mechanical means are given
in Table 1-1, as a guide to the nominal capacity
of the crane required.
1-7

Part 1
1-8
i,'I,·,"·M
7
/' "'-...
/ ~ 0
"",."_ ' '-
1. PROPELLER SHAFT
2. ENGINE SLING
3. ENGINE HOIST
4. QUICK·RELEASE PIN
5. REAR LINK
6. QUICK.RELEASE PIN
7. ADAPTER
8. PROPELLER SLING
9. ENGINE ATTACHMENTS
Figure 1- 3. Hoisting Engine and Power Plant
..
4MC4
Part 1
1-8
i,'I,·,"·M
7
/' "'-...
/ ~ 0
"",."_ ' '-
1. PROPELLER SHAFT
2. ENGINE SLING
3. ENGINE HOIST
4. QUICK·RELEASE PIN
5. REAR LINK
6. QUICK.RELEASE PIN
7. ADAPTER
8. PROPELLER SLING
9. ENGINE ATTACHMENTS
Figure 1- 3. Hoisting Engine and Power Plant
..
4MC4