Piper TWIN COMANCHE PA-30 User manual

'PIPER
AIRPLANESERVICEMANUAL
CARD1OF4
0TWINCOMANCHE
PA-30
PA-39
PIPER
AIRCRAFT
CORPORATION
PARTNUMBER753645 REVISED:OCT.1,1998
lAl

0
Published by
TechnicalPublications
© The New Piper Aircraft, Inc.
2926PiperDrive
VeroBeach,Florida 32960
U.S.A.
GAMA
Member
GeneralAviation
ManufacturersAssociation
0
1A2

PIPER TWIN COMANCHE SERVICE MANUAL
AEROFICHEREVISIONSTATUS
Revisionsto this servicemanual 753
reissued(onpaperonly)December29,
Revisions
645, originally published
1972are as follows: (on paper only) August 1, 1963 and
Publication Date
ORIGINAL (Paper only)
COMPLETE REISSUE (Paper only)
COMPLETE REISSUE (Paper only)
1st
2nd
3rd
4th
5th
6th
7th
8th*
August 1, 1963
June 25, 1969
December 29, 1972
January 31, 1974
June 28, 1976
October 6, 1977
April 26, 1978
September 10, 1979
April 6, 1981
October 28, 1982
October 1, 1998
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None
1,2 and 3
1 and 2
1,2 and 3
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1,2,3 and 4
1,2,3 and 4
1,2, 3, and 4
* Revisions appear in all four cards. Accordingly,
discard your existing card set and replace it with
these cards dated October 1, 1998.
A. Consult
thelatestPiper
Customer
ServiceInformation
Catalog
No. 1753-755
(Aerofiche)
for
currentrevisiondatesforthismanual.
B. The GeneralAviation ManufacturersAssociation (GAMA) has developed specificationsfor
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Service Manual will be kept currentby revisionsdistributedperiodically.
These revisions will
supersedeall previous revisions and will be complete Aerofichecard replacementsand shall
supersedeAerofiche
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andList ofTables
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Revised: 10/1/98 PREFACE
1A3

PIPER TWIN COMANCHE SERVICE MANUAL
EFFECTIVITY
Thisservice
manualiseffective
forallPA-30andPA-39airplanesasfollows:
ModelName ModelNumber SerialNumbers ModelYears
TwinComanche
TwinComanche B and
TwinComanche Turbo B
Twin ComancheC and
Twin ComancheTurbo C
Twin Comanche C/R and
Twin Comanche Turbo C/R
PA-30
PA-30
PA-30
30-2thru 30-901. less 30-853
30-853and 30-902 thru 30-1744.
less 30-171
30-1717 and 30-1745 thru 30-2000
1963- 1965
1966- 1968
1968- 1970
1970- 1972
PA-39 39-1 thru 39-155
PARTS
This manualgenerallydoesnot containhardwarecalloutsfor installation.Hardwarecalloutsare only
indicatedwherea specialapplicationis required.Toconfirmthe correcthardwareused,referto thePA-
30/39TwinComanchePartsCatalogP/N753646.andFAR43forproperutilization.
WARNINGS,CAUTIONSANDNOTES
Theseare usedto highlightoremphasizeimportantinformation.
- WARNING-
OPERATINGPROCEDURES,
PRACTICES,ETC., WHICH
MAY RESULTIN
PERSONAL INJURY OR LOSS OF LIFE IF NOT CAREFULLY
FOLLOWED.
- CAUTION-
OPERATING PROCEDURES, PRACTICES, ETC., WHICH IF NOT
STRICTLYOBSERVED
MAYRESULTIN DAMAGETO EQUIPMENT.
- Note-
An operatingprocedure,condition,etc.,whichisessentialto emphasize.
0
PREFACE Added:10/1/98
1A4

PIPER TWIN COMANCHE SERVICE MANUAL
SECTION INDEX GUIDE
SECTION SUBJECT GRID
NO.
PARTI - Information Commonto PA-30and PA-39
AEROFICHECARDNO.1
IINTRODUCTION IAI5
II HANDLING AND SERVICING IA19
II INSPECTION ID15
IV STRUCTURES IE5
VSURFACECONTROLS 1G7
VI NOT USED
APPENDIX I CONTROL CABLE INSPECTION PROCEDURE IK1
AEROFICHE CARD NO.2
VII
VII
VIIIA
IX
LANDING GEAR AND BRAKE SYSTEM
POWER PLANT (NORMALLY ASPIRATED)
POWER PLANT (TURBOCHARGED)
FUEL SYSTEM
2A9
2D18
2G1
2121
XINSTRUMENTS 2K14
AEROFICHE CARD NO. 3
XI ELECTRICAL SYSTEM 3A9
XII ELECTRONICS 3G12
AEROFICHECARDNO.4
XIII HEATINGAND VENTILATINGSYSTEM 4A7
XIV ACCESSORIESAND UTILITIES 4E7
PART I -Information Uniqueto PA-39
IINTRODUCTION 4G5
II HANDLINGAND SERVICING 4G9
IV STRUCTURES 4G16
VSURFACECONTROLS 4G19
VIII POWER PLANT (NORMALLYASPIRATED) 4H5
VIIIA POWERPLANT (TURBOCHARGED) 4H11
XINSTRUMENTS 4H17
XI ELECTRICALSYSTEM 4H19
XII
Revised:10/1/98
ELECTRONICS 411
PREFACE
1A5

PIPER TWIN COMANCHE SERVICE MANUAL
LIST OF ILLUSTRATIONS
- PARTI
FigureNo. Subject Grid
No,
2-1. ThreeView
ofTwinComanche,
Serial
Nos.30-1to 30-852
incl.and
30-854to30-901inc ................................................................................................. A23
2-2. ThreeView
ofTwin
Comanche,
Serial
Nos.30-853,
to 30-2000
incl ............................ IA24
2-3. StationReference
Lines,
Fuselage
...................................................................................
B9
2-4. StationReference
Lines,
Wing
andStabilator..................................................................
1B10
2-5. AccessPlatesandPanels,
Fuselage
Interior..................................................................... 11
2-6. AccessPlates
andPanels,Fuselage,
SerialNos.
30-1
to 30-852
incl.,and
30-854
to 30-901
incl................................................................... B12
2-7. Access
Platesand
Panels,
Fuselage,
Serial
Nos.30-853,
30-902
to 30-2000
incl ............................................................................................................
B13
2-8. Access
Platesand
Panels,
Wings......................................................................................
1B14
2-8a. Torque
Wrench ormula...................................................................................................
IB17
2-9. Jacking
Arrangements
......................................................................................................
IB22
2-10. W
eighing
Airplane............................................................................................................
IB23
2-11. Leveling
Airplane,
Serial
Nos.
30-1to30-852incl.
and
30-854to 30-901
incl..................................................................................................
IB24
2-12. Leveling
Airplane,
Serial
Nos.30-853,
30-902
to30-2000
incl..................................... 1B24
2-13. Minimum
Turning
Radius................................................................................................
C3
2-14. Servicing
Landing
GearStruts
.........................................................................................
C7
2-15. Service
Points,
SerialNos.
30-1to30-852
incl.and30-854
to 30-901incl................... 1C11
2-16. Service
Points,
SerialNos.30-853,
30-902
to 30-2000
inc ........................................... IC12
2-17. OilSuction
Screen
...................................................................................................... C19
2-18. OilPressure
Screen...........................................................................................................
1C19
2-19. Turbo
OilFilter.................................................................................................................
C20
2-20. Lubrication
Chart..............................................................................................................
1D2
2-21. Identification
ofAircraft
FluidLines...............................................................................
1D12
2-22. Removal
ofCherrylock
Rivets
.........................................................................................
D13
4-1. Landing
Light
Installation
................................................................................................
1E9
4-2. Aileron
and
FlapInstallation
............................................................................................
El
4-3. WingInstallation
..............................................................................................................
IE16
4-4. Empennage
Installation
...................................................................................................
E23
4-5. Windshield
Installation
.....................................................................................................
1F2
4-6. SideWindow
Installation
(Typical)
..........................................................
..................... 1F3
4-7. DoorInstallation..............................................................................................................
IF4
4-8. DoorLocking
Mechanism
................................................................................... IF5
4-9. SkinM
aterialandThickness
...........................................................................................
1F7
4-10. Typical
Access
Holes.......................................................................................................
IF10
4-10a. Checking
Stabilator
FreePlay
..........................................................................................
1F13
4-11. Balancing
Stabilator,
Serial
Nos.30-1
to 30-852
incl.,30-854
to
30-901
incl.,30-1717,
30-1745
to30-2000
inc............................................................. F15
4-12. Balancing
Stabilator,
Serial
Nos.
30-853,
30-902
to 30-1716
incl.
and30-1718
to 30-1744
incl...........................................................................................
IF15
4-13. CheckingandBalancing
Rudder
........................................................................................
F18
4-14. Surface
Scratches,
Abrasion
orGround-in-Dirt
.................................................................1F23
4-15. DeepScratches,
Shallow
Nicks
andSmall
Holes
...............................................................
IF23
PREFACE Revised:
10/1/98
1A6

PIPER TWIN COMANCHE SERVICEMANUAL
LIST OF ILLUSTRATIONS- PARTI (cont.)
Figure No. Subject Grid No.
4-16. Mixing ofEpoxy Patching Compound ............................................................... F24
4-17. Welding Repair Method...................................................................................................... F24
4-18. RepairingofCracks ............................................................................................................ IG
4-19. VariousRepairs................................................................................................................... 1G3
4-20. Repair ofStress Lines .............................................................. ....................... G4
4-21. Repair ofImpacted Damage ........................................ ....................... IG4
5-1. Control Column Installation ........................................ ....................... 1G16
5-la. Correct Method of Installing RodEnd Bearings ................................................................ 1G19
5-2. Aileron Control Installation ........................................ ....................... 1G23
5-3. Installationof Bellcrank Checking Tool ........................................ ....................... 1H3
5-4. Installationof Aileron Rigging Tool........................................... .................... 1H3
5-5. Stabilator and Stabilator Trim Controls .............................................................................. IH8
5-6. Stabilator Rigging Tool....................................................................................................... IH12
5-7. Methods of BlockingTrim Cables .................. .................................................................... IH13
5-8. Rudder Pedal Installation.................................................................................................... H20
5-9. Adjustment ofBrake Pedal ............................................................... I1H21
5-10. Rudder and Rudder Trim Controls...................................................................................... 1H23
5-11. Clamping Rudder Pedals inNeutral Position ..................................................................... 112
5-12. Determining Neutral RudderPosition ................................................................................ 113
5-13. Checking Rudder Travel..................................................................................................... 113
5-14. Trim ScrewAssembly ......................................................................................................... 1110
5-15. Flap Control Installation ...................................................................... 1120
5-16. Flap PositionSender Unit................................................................................................... 1123
5-17. FabricatedAileron Bellcrank Rigging Tool........................................................................ 1J13
5-18. FabricatedAileron Rigging Tool ........................................................................................ 1114
5-19. FabricatedStabilator RiggingTool ................................................... IJ15
APP 1-1. Control Cable Inspection Technique
................................................................................... IK2
APP 1-2. External Cable WearPatterns.............................................................................................. IK2
APP 1-3. InternalCable Wear ............................................................................................................ K3
APP 1-4. Pulley Wear
Patterns ........................................................................................................... K4
7-1. Nose GearOleo Strut Assembly ......................................................................................... 2A17
7-2. Nose LandingGear Installation.......................................................................................... 2A23
7-3. Clamping Rudder Pedals in Neutral Position ..................................................................... 2B
7-4. Rudder Pedals at Neutral Angle.......................................................................................... 2B2
7-4a. RudderPedals at Neutral PositionS/N 39-84 and up ......................................................... 2B2
7-5. Installationof Plumb Bob Attachment Tool ....................................................................... 2B4
7-6. Installationof Nose Gear Alignment Jig............................................................................. 2B4
7-7. Nose GearDoor Installation ............................................................................................... 2B5
7-8. Main GearOleo Strut Assembly......................................................................................... 3B9
7-8a. Main GearSide Brace Link Travel ..................................................................................... 2B14
7-8b. Main GearSide Brace Bearing Tolerance........................................................................... 2B14
7-8c. Main GearSide Brace Link Tolerance................................................................................ 2B 15
7-9. Main Landing Gear Installation (Left)................................................................................ 2B19
7-10. Adjustmentof Main LandingGear Drag Link.................................................................... 2B21
7-1. Aligning MainGear.................................................................................................... 2B22
Revised:10/1/98 PREFACE
1A7

PIPER TWIN COMANCHE SERVICE MANUAL
LISTOF ILLUSTRATIONS
-PART
I (cont.)
FigureNo. Subject GridNo.
7-12. LandingGear
RetractionSystem
........................................................................................
2C
7-13. LandingGear
RetractionTransmission
Assembly
.............................................................
2C4
7-14. Landing
GearRetraction
Transmission
Installation
...........................................................
2C10
7-15. Landing
Gear
Up Limit
Switch...........................................................................................
2C12
7-16. Torque
WrenchandAdapterInstallation
............................................................................
2C14
7-17. LandingGearDown
LockInstallation................................................................................
2C15
7-18. Landing
GearWarning
SwitchInstallation.........................................................................
2C16
7-19. NoseWheelAssembly
........................................................................................................
2C18
7-20. Main WheelAssembly.Serial
Nos.30-2to 30-845incl ...................................................2C19
7-21. MainWheel
Assembly.
Serial
Nos.30-846
to 30-2000
incl ............................................. 2C20
7-22. WheelBrakeAssem
bly.......................................................................................................
2C22
7-22a. Removal
andInstallation
of AnchorBolt
...........................................................................
2C23
7-23. Removal
ofWheelBrakeDisc............................................................................................
2C24
7-24. Brake
SystemInstallation
...................................................................................................
2D
7-25. BrakeMasterCylinder
Assembly
.......................................................................................
2D3
7-26. Bleeding
Brakes..................................................................................................................
2D5
7-26a. Brake
Cylinder
Installation
................................................................................................
2D5
7-27. Fabricated
PlumbBobTool..............................................................................................
2D9
7-28. Fabricated
NoseWheelAlignmentJig...............................................................................
2 10
7-29. Fabricated
Spanner
Wrench
................................................................................................
2D11
7-30. Inspection
ofRodEndBearings
.........................................................................................
2D12
7-31. Main GearWear Limits.......................................................................................................
2D14
7-32. NoseGear
WearLimits
.......................................................................................................
2D16
8-1. EngineCowling
andCowlFlapRigging
............................................................................
2D23
8-2. Standard
Propeller
Installation
............................................................................................
2E
8-3. Typical
NicksandRemoval
Methods
.................................................................................
2E4
8-4. PropellerGovernor..............................................................................................................
2E10
8-5. EngineInstallation..............................................................................................................
2E15
8-6. Schematic
Diagramof RSA
FuelInjector
System..............................................................
2E19
8-7. FuelInjector.......................................................................................................................
2E21
8-8. FuelAirBleedNozzle.........................................................................................................
2E21
8-9. M
agnetoBreaker
Points.........................................................................
...... 2........
........... 2E23
8-10. Contact
SpringInspection
...................................................................................................
2E24
8-11. Impulse
Coupling..................................................................................................... 2E24
8-12. M
agnetoTiming
Marks.......................................................................................................
2F2
8-13. Engine
Timing
Marks.........................................................................................................
2F3
8-14. Removing
Spring
FromLeadAssembly.............................................................................
2F6
8-15. Assembly
Tool
....................................................................................................................
2F7
8-16. UsingAssembly
Tool.........................................................................................................
2F7
8-17. M
easuring
Lead
Assembly
Length
.....................................................................................
2F7
8-18. CuttingM
etallicBraid
fromEnd
ofLead...........................................................................
2F8
8-19. Unbraiding
MetallicShielding............................................................................................
2F8
8-20. Form
ingShielding
Around
Ferrule
...............................................
........................ ..... 2F9
8-21. FerruleSeating
Tool...........................................................................................................
2F9
8-22. Needle .......................................................................................................................
2F9
PREFACE Revised:
10/1/98
1A8

8-23.
8-24.
8-25.
8-26.
8-27.
8A-1.
8A-2.
8A-3.
8A-4.
8A-5.
8A-6.
8A-6a.
8A-7.
8A-8.
8A-9.
8A-10.
8A-I1.
8A-12.
8A-13.
8A-14.
8A-15.
8A-16.
8A-17.
8A-18.
8A-19.
8A-20.
8A-21.
8A-22.
8A-23.
8A-24.
8A-25.
8A-26.
8A-27.
8A-28.
8A-29.
9-1.
9-2.
9-3.
9-4.
9-5.
9-6.
9-7.
9-8.
9-9.
9-10.
PIPER TWIN COMANCHE SERVICE MANUAL
LIST OF ILLUSTRATIONS-PART I (cont.)
Figure No. Grid No.
MeasuringWire From Topof Ferrule .................................................................................
Installing Grommet Over Lead Assemblies........................................................................
Lead Assembly Installed in Grommet ................................................................................
Wire Doubled Over For Installation of Eyelet....................................................................
Rem
ovingFrozen Spark Plug .............................................................................................
EngineCowling and Cow
lFlap Rigging ............................................................................
PropellerInstallation ...........................................................................................................
TypicalNicks and Rem
oval Methods .................................................................................
PropellerGovernor..............................................................................................................
EngineInstallation .............................................................................................................
SchematicDiagram of TurbochargedSystem.....................................................................
Lockwiring V-Band C
ouplings ...........................................................................................
SchematicDiagram of RSA Fuel Injector System..............................................................
Fuel Injector .......................................................................................................................
Fuel Air Bleed Nozzle.........................................................................................................
Magneto Breaker Points......................................................................................................
Contact Spring Inspection...................................................................................................
ImpulseCoupling...............................................................................................................
Magneto Timing Marks.......................................................................................................
EngineTuning Marks .........................................................................................................
RemovingSpring From Lead Assem
bly.............................................................................
Assembly Tool ....................................................................................................................
Using A
ssembly Tool..........................................................................................................
MeasuringLead Assembly Length.....................................................................................
CuttingMetallic B
raid From End of Lead..........................................................................
UnbraidingMetallic Shielding............................................................................................
Forming Shielding Around Ferrule.....................................................................................
Ferrule SeatingTool............................................................................................................
Needle .......................................................................................................................
Measuring Wire From Top of Ferrule .................................................................................
Installing Grommet OverLead Assemblies........................................................................
Lead Assembly Installed in Grommet ................................................................................
Wire Doubled Over for Installation of Eyelet.....................................................................
Removing Frozen Spark Plug.............................................................................................
Turbo Oil Flow Check.........................................................................................................
Fuel SystemSchematic (PA-30) .........................................................................................
Fuel SystemSchematic (PA-30Turbo)...............................................................................
Fuel CellInstallation (Main/Inboard) .................................................................................
Fuel Cell Installation (Auxiliary/Outboard)........................................................................
Checking Sender Unit .........................................................................................................
Checking Fuel Gauge..........................................................................................................
Fuel Indicating System Wing Schematic............................................................................
Fuel System Installation......................................................................................................
Fuel SystemInstallation (Turbo) ........................................................................................
Fuel StrainerAssembly .......................................................................................................
2F10
2F10
2F10
2F10
2F13
2G5
2G8
2G10
2G18
2G23
2H4
2H5
2H8
2HII
2HII
2H13
2H14
2H14
2H15
2H17
2H19
2H20
2H20
2H21
2H21
2H21
2H22
2H23
2H23
2H23
2H23
2H24
2H24
212
214
2124
2J1
2J4
2J5
2JII
2J11
2J14
2J15
2J17
2J20
Revised:10/1/98 PREFACE
1A9

PIPER TWIN COMANCHE SERVICEMANUAL
LIST
OFILLUSTRATIONS
-PARTI (cont.)
Figure
No. Subject GridNo.
9-11. FuelSelector
Installation....................................................................................................
222
9-12. FuelSelector
Valve
ControlInstallation
............................................................... 223
9-13. Weldon
RotaryFuelPump..................................................................................................
2K2
9-14. Solenoid
Valve. ......................................................................................... 2K6
9-15. Fabricated
FuelQuantity
Transmitter
Checking
Jig...........................................................
2K10
10-1. Instrument
Panel,SerialNos.
30-1to30-852
incl.and
30-854to 30-901incl ....................................................................................................
2K16
10-2. Instrument
Panel,SerialNos.
30-853,30-902
to 30-1716
incl.
and30-1718
to 30-1744
incl...........................................................................................
2K17
10-3. Instrument
Panel,Serial
Nos.
30-1717,30-1745
to 30-2000
incl.......................................2K18
10-3a. Securing
Pump............................................................................................ 2K24
10-4. Vacuum
SystemInstallation
................................................................................................
2L
10-5. EGT
Thermocouple
Installation..........................................................................................
2L5
11-1. Generator
WiringSystem
Schematic
............................................................ 3A15
11-2. Sectional
ViewofGenerator
..............................................................................................
3A19
11-3. Wiring
Circuit,Dual
Regulators ............................................................... 3A21
11-4. Current/Voltage
Regulator
............................................................ ....................... 3B4
11-5. UseofRifflerFiletoCleanContact
Points.......................................................................
3B7
11-6. Voltage
Regulator
AirGap..................................................................................................
3B7
11-7. Checking
Voltage
Setting
Fixed
Resistance
Method
..........................................................
3B8
11-8. Checking
Voltage
SettingVariable
Resistance
Method
......................................................
3B8
11-9. Adjusting
Voltage
Regulator
Setting...................................................................................
3B9
11-10. Cutout
RelayAirGapCheckand
Adjustment....................................................................
3BI
11-11. Cutout
RelayPointOperating
Check
andAdjustment
.......................................................
3B11
11-12. Checking
CutoutRelayClosing
Voltage
........................................ ....................... 3B12
11-13. Adjustment
ofCutout
Relay
ClosingVoltage
.....................................................................
3B12
11-14. Checking
Current
Regulator,
Load
Method........................................................................
3B13
11-15. Checking
Current
Regulator,
lumperLeadMethod
...........................................................
3B13
11-16. Checking
andAdjusting
Relay
AirGap.............................................................................
3B16
11-17. Checking
and
Adjusting
Relay
Point
Opening
...................................................................
3B16
11-18. Checking
Relay
Closing
Voltage ............................................................... 3B17
11-19. Adjusting
RelayClosing
Voltage
.......................................................................................
3B17
11-20. Alternator
Wiring
System
Schematic..................................................................................
3B19
11-21. Exploded
View
ofAlternator ............................................................... 3B21
11-22. Removal
ofRectifier...........................................................................................................
3B23
11-23. Removal
ofSlipRingEndBearing
....................................................................................
3B23
11-24. RemovalofDriveEndHead ............................................................... 3B23
11-25. Removal
ofEndHeadBearing
...........................................................................................
3B23
11-26. Testing
Rotor
forGrounds ............................................................... 3B24
11-27. Testing
Rotor
for Shorts
................................................................................
................ 3B24
11-28. Installation
ofBearing....................................................................................................
3C
11-29. Installation
ofRectifier
...................................................... ....................... 3C
11-30. Terminal
Assembly
.................................................................. 3C2
11-31. SlipRing
EndBearing
Assembly
........................................ ....................... 3C2
11-32. Testing
Alternator
........................................................... ........ 3C3
PREFACE Revised:
10/1/98
1A10

PIPER TWIN COMANCHE SERVICE MANUAL
LIST OF ILLUSTRATIONS
-PARTI (cont.)
FigureNo. Subject Grid
No.
11-33. Brush
Installation
........................................................................................ 3C4
11-34. InternalWiring
Diagram
.....................................................................................................
3C5
11-34a. Alternator
Paralleling
System ............................................................... 3C9
11-35. Regulator
Diagram
(Prestolite) ............................................................... 3C14
11-35a. Regulator
Diagram
(Lamar)
................................................................................................
3C14
11-36. Testing
Regulator
(Prestolite)
........................................ ....................... 3C17
11-36a. Testing
Regulator
(Lamar) ............................................................... 3C18
11-36b. Adjusting
Regulator
(Lamar) ............................................................... 3C19
11-37. Application
ofOvervoltage
Control....................................................................................
3C21
11-38. Testing
Overvoltage
Control ............................................................... 3C21
11-39. No-Load
TestHookup......................................................................................................
3D1
11-40. Lock-Torque
TestHookup
..................................................................................................
3D2
11-41. Resistive
Test
Hookup.........................................................................................................
3D2
11-42. Exploded
View
ofGearReduction
Starting
Motor.............................................................
3D6
11-43. Turning
Starting
Motor
Commutator
..................................................................................
3D9
11-44. Testing
Motor
Armature
forShorts...................................................................................
3D9
11-45. Testing
Motor
Fields
forGrounds
............................................................ ...............
..... 3D10
11-46. No-Load
TestHookup. ..................................................................... 3DI
11-47. Stall-Torque
Hookup
.....................................................................................................
-3D11
11-48. Electrical
System
Components,
Serial
Nos.30-1to
30-852
incl.and30-854
to30-901....................................................... ......... ...... 3D20
11-49. Electrical
System
Components,
SerialNos.
30-853,
30-902to 30-2000,
PA-39
S/N39-1
.........................................
................................ 3D21
NOTE
Index
forElectrical
Schematics
may
befoundinTable
XI-III,
Grid3E13.
12-1. ELT
Portable
Folding
Antenna
(Narco)
.....................................................................
..... 3G20
12-2. ELT
Using
FixedAircraft
Antenna
(Narco)
......................................................................
3G20
13-1. Heating
and
Ventilating
System,
Serial
Nos.30-1to
30-401
incl.................................... ............................
............................................. 4A
13
13-2. Heating
andVentilating
System,
SerialNos.
30-402
to
30-852
incl.and30-854
to30-901
incl ......................................................... 4A14
13-3. Heating
andVentilating
System,
SerialNos.30-853,
30-902to 30-2000
incl ...............................................................................................
4A15
13-4. Heater
Installation
(South
Wind),
Serial
Nos.
30-1to
30-401
incl.........................................................
..........................
......... ... ... 4A18
13-5. FlowSystem
(South
Wind
Heater)
................................................................................. 4A20
13-6. Fuel
Control
Valve
(Cutaway
View)
............................................................... 4A21
13-7. Wiring
Diagram
forSouth
Wind
Heater,
Model
940-DC12
.........................................
...... 4A22
13-8. FuelSafety
Valve
(Cutaway
View)
............................................................................
..... 4A23
13-9. Flame
Detector
Switch
(Cutaway
View).............................................................................
4B2
13-10. Exploded
PartsView,
Heater
Assembly...............................................................
........ 4BI1
13-11. Ventilating
AirBlower
Assembly
.................................................................................. 4B
15
13-12. Ventilating
AirBlower
Motor
...................................................................
........ 4B17
13-13. Combustion
AirBlower
Motor
..........................................................................................
4B
19
Revised:
10/1/98 PREFACE
IAll

PIPER TWIN COMANCHE SERVICE MANUAL
LISTOFILLUSTRATIONS-PARTI (cont.)
FigureNo. Subject GridNo.
13-14. DetailofExhaustExtensionsInstallation...........................................................................4B23
13-15. AirplaneHeaterAssemblyandCombustionAirBlower....................................................4C7
13-16. DiagrammaticCutawayofHeaterto ShowWhirling
FlameAction..................................................................................................................4C9
13-17. FuelRegulatorandShutoffValve.......................................................................................4C10
13-18. TopView-DuctSwitch......................................................................................................4C10
13-19. WiringDiagram. ......................................................................................... 4C11
13-20. PrimaryPowerCircuit............ ............................................................................. 4C14
13-21. StartingPowerCircuit.........................................................................................................4C15
13-22. SparkPlugGapAdjustment................................................................................................
4C18
13-23. SuggestedDesignforSealPlate,PlugsandCapsfor
CombustionTubeLeakageTest....................................................................................4D8
13-24. TestSet-upforCombustionAirPressureSwitch...............................................................4D9
13-25. ExplodedViewofHeaterAssemblyNo.751959..............................................................4D11
13-26. ExplodedView-Combustion
AirBlower
andMotorAssembly
No.753905..................................................................................................................4D15
13-27. SuggestedSet-upforHeaterOperationTest.......................................................................4D17
13-28. WiringConnections
forHeaterOperationTest...................................................................
4D18
13-29. HeaterFuelValve................................................................................................................4D20
14-1. OxygenSystemInstallation,SerialNos.30-2to30-852incl.
and30-854to 30-901incl...............................................................................................
4E9
14-2. OxygenSystem
Installation,Serial
Nos.30-853,30-902
to
30-1716incl.and30-1718to30-1744incl ...................................................... 4E10
14-3. OxygenSystemInstallation,SerialNos.30-1717,30-1745to
30-2000incl................................................................................................... 4E
14-3a. OxygenTubing
Installations...............................................................................................
4E18
14-4. SynchrophaserInstallation..................................................................................................
4E21
14-5. StrobeSensor............................................................. 4F12
14-6. PulseGenerator...................................................................................................................
4F3
14-7. ComputerAssembly............................................................................................................4F6
14-8. Fabricated
TestBox.............................................................................................................
4F7
14-9. ElectricalSchematic.....................................................................................
.................... 4F7
14-10. StrobeSensorInternal
WiringTestUnit.............................................................................
4F8
14-11. Strobe
SensorSimulator.....................................................................................................
4F8
14-12. PatchCableandTestTerminal
............................................................................................
4F9
14-13. PulseGeneratorSimulator..................................................................................................4F9
PREFACE Revised:10/1/98
1A12

I
I
PIPER TWIN COMANCHESERVICE MANUAL
LISTOF ILLUSTRATIONS -PARTI
Fieure No. Subject
-1. BalancingStabilator............................................................................................................
5-1. Stabilator RiggingTool .......................................................................................................
5-2. InterconnectingControl Cable Installation.........................................................................
5-3. Checking Stabilator Friction...............................................................................................
-1. Magneto Timing Marks.......................................................................................................
5-2. Engine TimingMarks .........................................................................................................
8A-1. Magneto Timing M
arks.......................................................................................................
8A-2. EngineTiming Marks .........................................................................................................
10-1. Instrument Panel .................................................................................................................
11-1. Dome Lights Schematic ......................................................................................................
11-2. Instrument Lights Schematic ..............................................................................................
11-3. Red Strobe Light Schematic ...............................................................................................
11-4. White Strobe Lights Schematic...........................................................................................
Revised:10/1/98
GridNo.
4G18
4G22
4G24
4H1
4H6
4H8
4H12
4H14
4H18
4H20
4H21
4H22
4H23
PREFACE
1A13

PIPER TWIN COMANCHE SERVICEMANUAL
LIST OF TABLES -PARTI
FigureNo. Subject GridNo.
-I. Leading Particulars and Principal Dimensions ................................................................... BI
II-IA. Flare Fitting Torques........................................................................................................... B16
I-I. Recommended Nut Torque (Inch-Pounds).......................................................................... B18
II-III. Decimal Conversion Chart.................................................................................................. B20
II-IIIA. Indicated Oxygen Pressures for Given Ambient Temperatures......................................... IC17
Il-IV. Recommended Lubricating Oils ........................................ ....................... IC18
II-IVA. Thread Lubricant................................................................................................................. ID
II-V. Decimal/ Millimeter Equivalents of Drill Sizes.................................................................. ID7
II-VI. Conversion Tables............................................................................................................... D8
II-VII. Maximum Distance Between Supports for Fluid Tubing ................................................... D14
III-I. Inspection Report ................................................................................................................ ID19
IV-I. Listof Materials (Thermoplastic Repair)............................................................................ F22
V-I. Control Surface Traveland Cable Tension......................................................................... G
V-IA. Control Surface Travel and Cable TensionAir Flow Modification .................................... IG12
V-II. Troubleshooting Chart (Surface Controls).......................................................................... IJ2
VIl-l. Torque for Effective Wrench Length ............................................................... 2C13
VII-II. Troubleshooting Chart (Landing Gear System).................................................................. 2D6
vn-m . Main Gear Wear Limits....................................................................................................... 2D15
VI-IV. Nose Gear Wear Limits....................................................................................................... 2D17
VI -I. Propeller Specifications (PA-30)......................................................................................... 2E7
VIII-IIl. Troubleshooting Chart (Engine) ............................................................... 2F16
VIIIA-I. Propeller
Specifications
(PA-30).........................................................................................
2G12
VIIIA-II. Troubleshooting Chart (Engine - Turbocharged)................................................................ 216
IX-I. Troubleshooting Chart (FuelSystem) ................................................................................. 2K8
X-I. Troubleshooting Chart (VacuumSystem) ........................................................................... 2L6
X-II. Troubleshooting Chart (Instruments)
.................................................................................. 2L8
XI-I. Troubleshooting Chart (Electrical System)......................................................................... 3E2
XI-II. Lamp Replacement Guide................................................................................................... 3E12
XI-III. Index - Electrical System Schematics................................................................................. 3E13
XI-IV. Circuit Load Chart .......... .......................................................................................... 3E14
XI-V. Electrical Wire Coding................................................................................................... 3E16
XI-VI. Electrical Symbols .............................................................................................................. 3E17
XIII-I. Troubleshooting Chart (South Wind Heater) ...................................................................... 4C3
XII-1 . Troubleshooting Chart (Janitrol Heater) ........................................................... 4D21
XIV-I. Troubleshooting Chart (Oxygen System) ........................................................................... 4E17
XIV-II. Troubleshooting Chart (Engine Synchrophaser)................................................................. 4F10
LIST OF TABLES-PARTII
II-I. LeadingParticulars and Principal Dimensions................................................................... 4G10
V-I. Control Surface Travel and Cable Tension ........................................ ......................... 4G21
VIII-I. Propeller Specifications (PA-39)......................................................................................... 4H10
PREFACE Revised:
10/1/98
1A14

SECTIONI
INTRODUCTION
Paragraph
1-1.
1-2.
1-3.
General .......
Scope of Manual ...........
Desc ription .......
1-4. Fuselage .........
1-5. Wing ......
1-6. Empennage .....
1-7. Flight Controls ....
1-8. Landing Gear ....
1-9. Brake System ....
1-10. Engines and Propellers .. .
1-11. Fuel System .....
1-12. Instruments .....
1-13. Electronic Equipment ..
1-14. Heating and Ventilating System
Aerofiche
Grid No.
1A16
1A16
IA16
1A16
1A16
1A17
1A17
1A17
1A17
1A17
1A18
IA18
1A18
1A18
Issued 12/29/72
1A15

SECTIONI
INTRODUCTION
1-1. GENERAL. This manual contains serviceand maintenance instructions for the Piper
PA-30/39 TwinComanche,designedand manufacturedasa versatile
airplane in the personal
and business
aviation field,by the Piper AircraftCorporation. LockHaven.
Pennsylvanua.
1-2. SCOPEOF MANUAL. Sections II and 111comprise the servicepart of this manual.
whereas Sections IV through XIV comprise the maintenance instructions. Part II of this
manual has serviceinformation which is specificallyfor the PA-39modelonly. The service
instructions include ground handling, servicing, and inspection. The maintenance
instructions for each system include troubleshooting, removal and installation of
components, and corrective maintenance and testing;each majorsystem of the aircraft is
covered in a separate section. Only qualified personnel should perform the operations
describedin this manual.
The description of the airplaneincludedin this sectionislimited to generalinformation.
Section I gives
leading particulars and principal dimensions, while each major system is
described in its appropriate section of the manual. For a more detailed description of the
airplane, refer to the Owner'sHandbook.
1-3. DESCRIPTION.The Piper PA-30Twin Comanche is a four-place(optional 5th and
6th seats are available in Serial Nos. 30-853. 30-902 and up) twin engine, low-wing
monoplane of all-metal construction. Paragraphs14 through 1-14provide descriptionsof
the majorcomponents and systems.
1-4. FUSELAGE. The fuselageconsists of three basic units: the nose section, the cabin
section.and the tail cone section.
1-5. WING. The laminar flow wing is of all-metal stressed-skin, full-cantileverdesign.
consisting of two wingpanelsbolted together at the center of the fuselage.
The wingtips are
removable.The aileronsare cable and pushrod controlled and are staticallyand dynamically
balanced.The tradingedge wingflapsare electricallyoperated.
INTRODUCTION
Issued !' '9'7
PIPER TWIN COMANCHESERVICE MANLAL
1A16

PIPER TWIN COMANCHESERVICE MANUAL
1-6. EMPENNAGE. The empennage consists of the fin. rudder. stabilator and stabilator
trim tab. The rudder and stabilator are statically balanced.
1-7. FLIGHT CONTROLS.The flight controls are conventional, consisting of a control
wheel which operates the ailerons and stabilators, and foot pedals which operate the rudder.
Duplicatecontrols are providedfor the copilot.
1-8. LANDING
GEAR. The landinggear isan electricallyoperated tricyclegear, consisting
of a nose wheeland two mainwheels.
1-9. BRAKESYSTEM.The brakes on the PA-30are hydraulicallyoperated by toe pedals.
1-10. ENGINES AND PROPELLERS.The airplane is powered by two Avco-Lycoming
four cylinder, direct drive, wet sump, horizontally opposed, fuel injected engines. The
propellers are Hartzell full feathering, constant speed units controlled by a governor
mounted on each engine.Some propellersare equipped with a backup springwhichallows
operation of the propeller in caseof loss of air from the air cylinder. These propellersare
identified by the letter "S" after the hub dash number, such as HC-E2YL-2BS.The "S"
propeller should not be intermixed with the other propellers.Each model with its engines
and particularpropellersare asfollows:
Model Engine Propeller H.P. Octane
PA-30 10-320-B1A HC-E2YL-2
HC-E2YL-2B
HC-E2YL-2BF
HC-E2YL-2BS
HC-E2YL-2BSF
160 91/96
PA-30 Turbo 10-320-C1A HC-E2YL-2
HC-E2YL-2B
HC-E2YL-2BF
HC-E2YL-2BS
HC-E2YL-2BSF
160 100/130
INTRODUCTION
Issued: 1
2/29/7
1A17

PIPER TWIN COMANCHESERVICE MANUAL
1-11. FUEL SYSTEM. The fuel system consists of four rubber-type cells located in the
wings with a total fuel capacityof 90 U.S.gallons.(Optional 15U.S.
galloneach, tip tanks)
two engine-driven
fuel pumps, two electric auxiliary fuel pumps and two combination fuel
selectorsand strainer valves.
1-12. INSTRUMENTS.Provisionsfor the instrument installationincludespanelsforengine
instruments and advance flight instruments. The panel is shock mounted to minimize
vibration to the instruments.
1-13. ELECTRONIC EQUIPMENT.Provision for electronic equipment includesvariois
combinations of radio installationsand AutoPilot.
1-14. HEATING
AND VENTILATING
SYSTEM. Heated air for the cabinand defroster is
obtained from a 25,000 BTUgasolineheater installed in the nosesection.Fresh air for the
cabin interior is obtained from two individualsources:one from the nose section and the
other from a scooplocated in the speedfairingaheadof the verticalfin.
INTRODUCTION
Issued: 12/29/72 1A18

PIPERTWIN COMANCHE SERVICE MANUAL
SECTIONII
HANDLINGANDSERVICING
Paragraph Aerofiche
GridNo.
2-1. Introduction.......................................................................................................................1A22
2-2. Dimensions........................................................................................................................1A22
2-3. StationReferenceLines....................................................................................................
A22
2-4. WeightandBalanceData..................................................................................................
1A22
2-5. SerialNumberPlate..........................................................................................................IB15
2-6. AccessandInspection
Provisions.............................................................. IB15
2-7. Tools
andTestEquipment.................................................................................................
IB15
2-8. TorqueRequirements
........................................................................................................
IB15
2-8a. TorqueWrenches...............................................................................................................
B17
2-9. HandholdandW
alkways...................................................................................................
B21
2-10. GroundHandling...............................................................................................................
IB22
2-11. Introductionto GroundHandling
....................................................................
IB22
2-12. Jacking.............................................................................................................
1B22
2-13. Weighing..........................................................................................................
1B23
2-14. Leveling...........................................................................................................
1B23
2-15. M
ooring...........................................................................................................
1CI
2-16. Parking.............................................................................................................
1C2
2-17. LockingAirplane.............................................................................................
C2
2-18. Towing
.............................................................................................................
C2
2-19. Taxiing.............................................................................................................
1C3
2-20. ExternalPowerReceptacle................................................................................................
C4
2-21. OperationofExternal
PowerReceptacle.........................................................
1C4
2-22. Cleaning............................................................................................................................
1C4
2-23. Cleaning
EngineCompartment........................................................................
C4
2-24. Cleaning
LandingGear
....................................................................................
IC5
2-25. CleaningExteriorSurfaces
................................................................ C5
2-26. Cleaning
Windshield
andWindows
.................................................................IC5
2-27. CleaningHeadliner,
SidePanelsandSeats...................................................... IC6
2-28. Cleaning
Carpets..............................................................................................
1C6
2-29. Servicing.......................................................................................................................
IC6
2-30. Introductionto Servicing .............................................................. 1C6
2-31. Landing
GearSystem
........................................................................................................
C6
2-32. ServicingLanding
Gear...................................................................................
IC6
2-33. OleoStruts........................................................................................................................C7
2-34. Servicing
Oleo
Struts......................................................................................
IC7
2-35. FillingOleo
Struts. .............................................................. IC8
2-36. InflatingOleo
Struts........................................ ...................... IC9
2-37. Brake
System
. ...................................................................... IC10
2-38. Servicing
BrakeSystem
........................................ ...................... ICIO
2-39. FillingBrakeCylinderReservoir....................................................................IC10
2-40. DrainingBrakeSystem
................................................................................... C10
Revised:10/1/98 HANDLINGANDSERVICING
1A19

PIPER TWIN COMANCHE SERVICE MANUAL
Paragraph Aerofiche
GridNo.
2-41. Tires............................................................................................................ 1C10
2-42. Servicing
Tires................................................................................................
lC10
2-43. PowerPlant .............................................................. 1C13
2-44. ServicingPower
Plant.....................................................................................
1C13
2-45. Propeller...........................................................................................................................
1C13
2-46. Servicing
Propeller ............................................................... IC13
2-47. Power
PlantInduction
AirFilter......................................................................................
1C13
2-48. Removal
ofAirFilter......................................................................................
IC13
2-49. InductionAirFilter.........................................................................................1C13
2-50. Cleaning
Induction
AirFilter,Turbocharged
................................................. C13
2-51. Installation
ofInduction
AirFilter.................................................................. 1C13
2-52. Vacuum
System
AirFilters
........................................ ........................ 1C13
2-53. Replacement
ofCentral
AirFilter
.................................................................. IC13
2-54. Replacement
ofInstrument
AirFilter............................................................. 1C14
2-55. Replacement
ofVacuum
Regulator
Filters
..................................................... C14
2-56. FuelSystems
....................................................................................................................
1C14
2-57. Servicing
FuelSystem....................................................................................1C14
2-58. FillingFuel
Cells ............................................................... 1C14
2-59. Draining
Fuel
Valvesand
Lines...................................................................... 1C14
2-60. Draining
FuelSystem
................................................................. IC15
2-61. Electrical
System..............................................................................................................
1C15
2-62. ServicingElectrical
System............................................................................ C15
2-63. OxygenSystem
..............................................................................................................
IC15
2-64. Servicing
theOxygen
System......................................................................... C15
2-65. Oxygen
System
Safety
Precautions
............................................................... IC15
2-66. FillingOxygen
Cylinder
................................................................................ 1C16
I2-66a. Inspection
andOverhaul
Time
Limits
............................................................ C17
2-67. Lubrication.........................................................................................
.............................. IC18
2-68. OilSystems
(Engine)
......................................................................................................
IC18
2-69. Servicing
OilSystem
............................. ....... .................................. 1C18
2-70. Draining
OilSump......................................................................................... 1C18
2-71. FillingOilSump................................................................................................
IC18
2-72. OilScreen
(Suction)
................................................................................... IC19
2-73. OilScreen(Pressure)........................................................................................
C19
2-74. OilFilter(Full
Flow)
....................................................
... ........................ IC20
2-75. Turbo
OilFilter
Cleaning
Procedure
.................................................................
IC20
2-76. Recommendations
forChanging
Oil................................................................IC21
2-77. Lubrication
Instructions
......................................................................................................
1C22
2-78. Application
ofOil........................................ ....................... IC22
2-79. Application
ofGrease
.......................................................................................
IC23
2-80. Lubrication
Chart............................ ................................... IC23
HANDLING AND SERVICING Revised: 10/1/98
1A20