SIRS Navigation KCA0101C Setup guide
SIRS NAVIGATION LTD
U8429
STANDBY COMPASS
Type
KCA0101C* KCA0104FY KCA0112W
KCA0101W KCA0105W KCA0113W
KCA0102C* KCA0106W KCA0113FY
KCA0102W* KCA0107W* KCA0114W
KCA0104W KCA0109W* WL1001KCA1
KCA0110W*
Codes indicated *are obsolete
COMPONENT MAINTENANCE MANUAL
WITH ILLUSTRATED PARTS LIST
ISSUE 11: April 2003 TP1
APR 10/03
Compass House, Bowes Estate, Wrotham Road, Meopham, Kent DA13 0QB England
34-25-21
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COMPONENT MAINTENANCE MANUAL
RECORD OF REVISIONS
INSERTED INSERTEDREV.
No. ISSUE
DATE DATE BY
REV.
No. ISSUE
DATE DATE BY
1 JANUARY
1976 S.I.
2 APRIL
1979 S.I.
3 AUGUST
1984 SEPTEMBER
1984 S.I.
4 FEBRUARY
1985 APRIL 1985 S.I.
5 APRIL
1985 JUNE 1985 S.I.
6 OCT
1987 NOVEMBER
1987 S.I.
7 MARCH
1989 MAY 1989 S.I.
8 JUNE
1992 JANUARY
1993 S.I.
9 JUNE
2000 SEPTEMBER
2000 S.I.
10 JANUARY
2001 JANUARY
2001 SIRS
11 APRIL
2003 APRIL
2003 SIRS
ROR 1
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COMPONENT MAINTENANCE MANUAL
RECORD OF TEMPORARY REVISIONS
INSERTED REMOVED PAGE No.TEMP
REV.
No.
ISSUE
DATE DATE BY DATE BY
RTR 1
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COMPONENT MAINTENANCE MANUAL
SERVICE BULLETIN LIST
SB NUMBER DATE TITLE REVISION SB
INCORPORATED DATE
34-180 NO EFFECT EMBODIMENT OF MOD.01 FOR
ALL MODELS EXCEPT
KCA0109W 2
34-730 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0101W 7
34-731 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0104W 7
34-731 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0104FY 7
34-732 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0105W 7
34-733 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0106W 7
34-734 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0112W 7
34-735 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0113W 7
34-735 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0113FY 7
34-736 MAY 1988 EMBODIMENT OF MOD.02 FOR
KCA0114W 7
34-737 MAY 1988 EMBODIMENT OF MOD.02 FOR
WL1001KCA1 7
SBL 1
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COMPONENT MAINTENANCE MANUAL
LIST OF EFFECTIVE PAGES
SUBJECT PAGE DESIGNATION DATE
TITLE PAGE TP 1 R Apr 10/03
RECORD OF REVISIONS ROR 1 R Apr 10/03
RECORD OF TEMPORARY
REVISIONS RTR 1 R Apr 10/03
SERVICE BULLETIN LIST SBL 1 R Apr 10/03
LIST OF EFFECTIVE PAGES LEP 1 R Apr 10/03
LEP 2 R Apr 10/03
TABLE OF CONTENTS TOC 1 R Apr 10/03
TOC 2 N Apr 10/03
TOC 3 N Apr 10/03
INTRODUCTION INTRO 1 R Apr 10/03
INTRO 2 N Apr 10/03
DESCRIPTION AND OPERATION 1 R Apr 10/03
2 R Apr 10/03
3 R Apr 10/03
TESTING AND FAULT ISOLATION 1001 R Apr 10/03
1002 R Apr 10/03
1003 R Apr 10/03
1004 R Apr 10/03
1005 R Apr 10/03
1006 R Apr 10/03
1007 R Apr 10/03
1008 R Apr 10/03
1009 R Apr 10/03
1010 R Apr 10/03
DISSASEMBLY 3001 R Apr 10/03
3002 R Apr 10/03
CLEANING 4001 R Apr 10/03
4002 R Apr 10/03
INSPECTION/CHECK 5001 R Apr 10/03
5002 R Apr 10/03
5003 R Apr 10/03
5004 R Apr 10/03
REPAIR 6001 R Apr 10/03
6002 R Apr 10/03
ASSEMBLY7001 R Apr 10/03
7002 R Apr 10/03
7003 R Apr 10/03
7004 R Apr 10/03
7005 R Apr 10/03
7006 R Apr 10/03
7007 R Apr 10/03
LEP 1
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LIST OF EFFECTIVE PAGES (CONTINUED)
SUBJECT PAGE DESIGNATION DATE
SPECIAL TOOLS FIXTURES
EQUIPMENT AND MATERIALS 9001 R Apr 10/03
9002 R Apr 10/03
9003 R Apr 10/03
ILLUSTRATED PARTS LIST 10001 R Apr 10/03
10002 R Apr 10/03
10003 R Apr 10/03
10004 R Apr 10/03
10005 R Apr 10/03
SPECIAL PROCEDURES 11001 R Apr 10/03
11002 R Apr 10/03
11003 R Apr 10/03
STORAGE 15001 R Apr 10/03
15002 R Apr 10/03
LEP 2
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TABLE OF CONTENTS
SUBJECT PAGE
INTRODUCTION
General INTRO 1
How to use this manual INTRO 2
Warnings, Cautions and Notes INTRO 2
DESCRIPTION AND OPERATION
General 1
Description 1
Operation 2
Leading Particulars 3
TESTING AND FAULT ISOLATION
General 1001
Directional Error 1001
Defective Lighting 1001
Slow Movement of Card 1003
Fluid Loss/Air Bubble 1003
Magnetic Correction Problems 1003
Performance Testing 1005
DISSASEMBLY
General 3001
Tools and Equipment 3001
Corrector Assembly 3001
Bellows 3001
Stem Assembly and Compass Card 3002
Lamp Housing Assembly 3002
Lead and Socket Assembly 3002
CLEANING
General 4001
Stem Assembly 4001
Corrector Assembly 4001
Lamp Housing Assembly 4002
Compass Bowl 4002
Compass Card Assembly 4002
Components 4002
INSPECTION/CHECKS
General 5001
Tools and Equipment 5001
Compass Bowl 5001
Stem Assembly 5002
Compass Card Assembly 5002
Lamp Housing Assembly 5002
Corrector Assembly 5003
Bellows Assembly 5003
Surface Finish 5004
Silicone Fluid 5004
TOC 1
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TABLE OF CONTENTS (CONTINUED)
SUBJECT PAGE
REPAIR
General 6001
Card Assembly 6001
Lamp Housing Assembly 6001
Bellows 6002
Surface Finish 6002
Compass Bowl 6002
ASSEMBLY
General 7001
Tools and Equipment 7001
Magnetising the Compass Card 7001
Balancing the Compass Card 7002
Check Heading Errors 7002
Stem Assembly and Compass Card Assembly 7004
Bellows 7004
Filling 7005
Corrector Assembly 7006
Lamp Housing Assembly 7006
Lead and Socket Assembly 7006
Testing 7007
SPECIAL TOOLS, EQUIPMENT, FIXTURES AND MATERIALS
General 9001
Electrical Supplies 9001
Tools, Fixtures and Equipment 9001
Special Tools Necessary for Compass Adjustment 9002
ILLUSTRATED PARTS LIST
Ordering 10001
General 10001
Compass Illustration 10002
Detailed Parts List 10003 - 10005
SPECIAL PROCEDURES
General 11001
Adjusting the Compass - General 11001
Removal of Mechanical Alignment Error (index error) 11002
Removal of ‘East-West’ and ‘North-South’ Errors 11003
STORAGE
General 15001
Packing Procedure 15001
Storage Conditions and Storage Life tests 15002
TOC 2
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LIST OF ILLUSTRATIONS
FIGURE ILLUSTRATION PAGE
1 STANDBY COMPASS – GENERAL VIEW 1
1001 TROUBLESHOOTING – DEFECTIVE LIGHTING 1002
1002 CORRECTOR LOCATION 1004
1003 DIRECTIONAL ERROR TEST JIG 1007
5001 BELLOWS TO COMPASS ASSEMBLY 5003
7001 HEADING ERRORS - CHECK 7003
7002 SILICONE FLUID - FILLING RIG 7007
9001 LANDING COMPASS 9003
10001 COMPASS ILLUSTRATION 10002
11001 COMPASS CORRECTION ADJUSTMENT 11001
ABBREVIATIONS IN THIS GUIDE
ABBREVIATION FULL DESCRIPTION
AECMA ASSOCIATION OF EUROPEAN CONSTRUCTORS OF AIRCRAFT
MATERIAL
ATA AIR TRANSPORT ASSOCIATION OF AMERICA
CMM COMPONENT MAINTENANCE MANUAL
INTRO INTRODUCTION
IPL ILLUSTRATED PARTS LIST
LEP LIST OF EFFECTIVE PAGES
MOD.02 MODIFICATION LEVEL 02 (BUILD LEVEL)
ROR RECORD OF REVISIONS
RTR RECORD OF TEMPORARY REVISIONS
SBL SERVICE BULLETIN LIST
SI SYSTEM INTERNATIONAL
TOC TABLE OF CONTENTS
TP TITLE PAGE
TOC 3
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COMPONENT MAINTENANCE MANUAL
INTRODUCTION
1. General
A. This manual is written to ATA iSpec 2000 and in AECMA Simplified English.
SI units of measurement are used with imperial units in parentheses.
B. The manual refers to physical and technical details of the compass and gives
necessary information to overhaul the compass units shown on the title page.
C. This manual refers to compasses manufactured to a ‘MOD.02’ specification.
‘MOD.02’ compasses were introduced in 1988 and no ‘MOD.01’ compasses have
been built since that date. All compasses overhauled by SIRS Navigation Ltd., are
modified to ‘MOD.02’.
D. Changes have been made to each page of the CMM and revision markers have
been excluded.
E. The manual does not refer to maintenance on the component when it is installed on
the aircraft. The compass is a sealed unit and must be repaired by the manufacturer
or an approved repair agent.
F. Only use trained employees for repair or maintenance of the compass.
G. This manual contains:
- Technical data for the component.
- Maintenance and repair procedures for the component.
- An Illustrated Parts List (IPL) . Parts are identified in all sections of the manual by
an IPL Figure and an item number.
H. The ‘Disassembly’, ‘Testing’, ‘Fault Isolation’ and ‘Assembly Procedures’ contained
in this manual have been written with reference to accepted working procedures.
I. SIRS Navigation Ltd. Purchased all rights to the compass products from ‘Smiths
Industries’ in 1994. Questions must be refered to SIRS Navigation Ltd.
INTRO 1
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2. How to use this manual
A. Make sure the manual contains the information applicable to your component. Look
on the title page for the part number.
B. If you need to identify a part or find a part number refer to the IPL.
C. Warnings, Cautions and Notes
The instructions in this manual must be used for all component
maintenance. Read all applicable WARNINGS, CAUTIONS and NOTES
before you work on the component.
These adjuncts to the text are used to highlight or emphasize important
points when necessary.
WARNINGS call attention to use materials, processes, methods,
procedures or limits, which must be followed precisely to prevent injury
to persons
CAUTIONS call attention to methods and procedures which must be
followed to prevent damage to equipment.
NOTES call attention to methods which make the job easier.
INTRO 2
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COMPONENT MAINTENANCE MANUAL
DESCRIPTION AND OPERATION
A. General
The compasses (Fig.1) are self-contained magnetic units, installed at eye level or
above, and give a constant indication of aircraft direction.
Aircraft direction is read from the compass card against a vertical lubber line marked
on the inside of the compass bowl. A ‘non-magnetic’ lamp is used to light up the
compass card.
CORRECTOR KEY APERTURES
Standby Compass - General View
Figure 1
COMPASS CARD
LAMP HOUSING
LUBBER LINE
MOUNTING PLATE
SOCKET AND LEAD ASSEMBLY
Correctors are installed above the compass bowl to reduce magnetic errors. The
complete compass can be turned to correct magnetic ‘coefficient A’ errors.
B. Description
The compass card is of conic section with graduation-lines marked on its outer face.
The card is attached to an assembly that includes a cobalt ring magnet and pivot.
The pivot turns in a sapphire cup that is installed in a stem assembly, which is
attached to the compass bowl by a bracket.
The compass bowl is a transparent polycarbonate moulding, painted black or grey.
The compass card is seen through a transparent window at the front of the bowl.
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The compass bowl is filled with silicone fluid to control movement of the compass
card. Bellows (10) at the rear of the compass bowl, allow fluid volume changes.
A filling plug (190), disc (210) and washer (200) are assembled to the compass bowl
below the corrector assembly (160). A marked scale, on the front edge of the
corrector assembly gives a guide for coefficient 'A' correction.
The magnetic correctors, for coefficients 'B' and 'C', are small bar magnets installed
in the gear shafts of the corrector assembly. ‘Indicator lines’ on the end of the gear
shafts identify the direction of the magnets. Gear shaft movement can be seen on
top of the corrector assembly as an angular difference between the indicator lines
and the marked index lines. The magnetic correctors are adjusted with a corrector
key (220) that is turned inside the corrector adjustment holes, at the front of the
compass bowl.
The lamp housing assembly (230) is a plastic moulding that is assembled to the
base of the bowl and secured with a clip-fit procedure.
A lead and socket assembly (260) is assembled to the underneath of the lamp
housing assembly.and gives electrical connection.
A ‘non-magnetic’ lamp (240) is installed into a spring inside the lamp housing
assembly and is retained by the lamp cap (250).
D. Operation
The compass operates without an electrical power supply. The magnet of the
compass card is aligned with the earths magnetic field. The direction of the aircraft
is determined with reference to a vertical lubber line positioned close to the compass
card.
Magnetic corrector magnets, at the top of the compass, can be adjusted to cancel
magnetic forces induced by the aircraft.
A light fitted at the bottom of the compass is used to light up the compass card.
PAGE 2
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The compass must be installed with two ‘non-magnetic’ screws, with a head
diameter of dimension 6.5mm to 6.9mm.
CAUTION:THE SCREWS THAT ATTACH THE COMPASS MUST NOT
BE OVER-TIGHTENED.
NOTE: Refer to the installation drawing for detailed information.The compass
does not need electrical power to operate, other than for illumination. The
compass will operate after installation and ‘magnetic correction’.
Magnetic correction is required to correct for magnetic errors caused by
the aircraft, local components or instruments. A correction procedure for
the compass is specified in page Block 11001 Special Procedures.
E. Leading Particulars
The leading particulars for each compass are shown in table 1 below
Code
Size
Weight
Voltage (dc)
Ambient
Operating
Temperture.
Lamp
Resistor
Body Colour
Card Legend
Colour
KCA0101W
Height: 51.0mm (2.00in)
Width: 57.5mm (2.26in)
Depth: 49.0mm (1.93in)
0.09KG
(3.5 oz)
None None White
KCA0104W 330ΩWhite
KCA0104FY 330ΩFluorescent Yellow
KCA0105W 330Ω
Black
White
KCA0106W 330ΩGrey White
KCA0112W 820ΩWhite
KCA0113W 390ΩWhite
KCA0113FY 390ΩFluorescent Yellow
KCA0114W
28v
47ΩWhite
WL1001KCA1
Height: 57.5mm (2.26in)
Width: 57.5mm (2.26in)
Depth: 51.5mm (2.03in)
0.113KG
(4 oz)
5v
-40°C to +80°C
None
Black
White
Standby Compass - Leading Particulars
Table 1
PAGE 3
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