Piper Navajo Chieftain PA-31-350 User manual

NAVAJO
CHIEFTAIN
SERVICE
MANUAL
CARD
1OF
4
PA-31-350
PIPER
AIRCRAFT
CORPORATION
(PART
NUMBER
761
488) 1A1
Courtesy of Bomar Flying Service
www.bomar.biz

NAVAJO
CHIEFTAIN SERVICE MANUAL
AEROFICHE EXPLANATION AND REVISION STATUS
Servicemanualinformation
incorporated
in thisset of Aerofiche
cards is arrangedin accordance
with
general
specifications
of Aerofiche
adopted
bytheGeneral
Aviation
Manufacturer's
Association.
Information
compiledin this Aerofiche
servicemanualis keptcurrentbyrevisions
distributed
periodically.
These revi-
sions supersede all previous revisions and are complete Aerofiche card replacements and supersede
Aerofiche
cards
of same
number
inset.
Identification
of revised
material:
Revised text andillustrations
are indicatedby a blackverticalline along the left-handmarginof the
frame,opposite
revised,
or addedmaterial.
Revision
lines indicate
only currentrevisions
with changes and
additions
toexistingtextandillustrations.
Changes
in capitalization,
spelling,
punctuation,
indexing,
physical
location
ofmaterial
orcomplete
pageadditions
arenotidentified
byrevision
lines.
Revisions to Service Manual 761 488 issued November 11, 1972are as follows:
Revisions Publication Date Aerofiche Card Effectivity
ORG721111
CR800923
PR810311
PR810824
PR820208
PR821015
PR831005
PR840305
PR840503
IR860429
IR860925
IR870505
IR871009
IR900313
PR940331
IR941230
IR960716*
November 11, 1972
September 23, 1980
March 11, 1981
September 24, 1981
February 8, 1982
October 15, 1982
October 5, 1983
March 5, 1984
May 3, 1984
April29, 1986
September 25, 1986
June 12, 1987
June 15, 1988
March 13, 1990
March 31, 1994
December 30, 1994
July 16, 1996
1,2, 3, and 4
1,2, 3, and 4
1,2, 3, and 4
1,2, 3 and 4
1,2, 3, and 4
1,2, 3, and 4
1,2, and 3
1
1
1
1
2
1
1,2, 3, and 4
1
1
* INTERIM REVISION
Revisions appear in Section V of card 1. Please dispose of your current
card 1 and replace it with the revised card. DO NOT DISPOSE OF
CARDS 2, 3, and 4.
Consult the Customer Service Information Aerofiche for currentrevision dates for this manual.
Revised:
3/31/94
Interim
Revision:
7/16/96 1A2

TABLE
OF CONTENTS
AEROFICHE CARD NO. 1 GRID NO.
I INTRODUCTION 1A16
II HANDLING AND SERVICING 1A21
III INSPECTION 1
D14
IV STRUCTURES 1E18
V SURFACE CONTROLS 1H16
AEROFICHE CARD NO. 2
VI HYDRAULIC SYSTEM 2A8
VII LANDING GEAR AND BRAKE SYSTEM 2D14
VIII POWER PLANT 2H3
IX FUELSYSTEM 2K1
AEROFICHE CARD NO. 3
X INSTRUMENTS 3A7
XI ELECTRICAL SYSTEM 3C8
AEROFICHE CARD NO. 4
XII ELECTRONICS 4A9
XIII HEATING AND VENTILATING SYSTEM 4B6
XIV ACCESSORIES AND UTILITIES 4D24
1A3

1A4
INTENTIONALLY LEFT BLANK

1A5
INTENTIONALLYLEFTBLANK

NAVAJO CHIEFTAIN SERVICE MANUAL
LIST OF ILLUSTRATIONS
Figure Aerofiche
Grid No.
2-1.
2-2.
2-3.
2-4.
2-5.
2-6.
2-7.
2-8.
2-9.
2-10.
2-11.
2-12.
2-15.
2-17.
2-18.
2-19.
2-20.
2-21.
3-1.
3-2a.
3-4.
3-3.
3-4.
3-5.
3-6.
4-7.
4-2.
4-3.
4-4.
4-5.
4-6.
4-7.
4-8.
4-9.
4-10.
4-11.
4-12.
4-13.
4-14.
4-15.
4-16.
4-17.
4-l8.
4-19.
4-20.
4-21.
Three-View of PA-31-350...................................................
Station Reference Lines ....................................................
Torque Wrench Formula ...................................................
Access Plates and Panels ...................................................
Jacking Arrangement ..................................
Weighing Arrangement .................................
Leveling - Longitudinal and Lateral ......................
Tow Turn Limits and Indicator ..........................
Service Points.........................................
Landing Gear Strut Exposure ...........................
Tire Balancer .........................................
Lubrication Chart (Landing Gear. Main) .................
Lubrication Chart (Landing Gear. Nose) ..................
Lubrication Chart (Control System) ......................
Lubncation Chart (Control System -cont) ................
Lubncation Chart (Power Plant. Propeller and Cowl Flap)
Lubrication Chart (Doors and Seats) .....................
Fabricated Jack Stand for Piper Jack. P N 18338-00.......
Fabricated Tail Stand ..................................
Removal of Cherrylock Rivets...........................
Identification of Aircraft Fluid Lines .....................
Wing Flap Transmission Inspection ......................
Wing Flap Actuator Cable - 100 Hour Inspection ..........
Wing Flap Actuator Cable - 500 Hour Inspection ..........
Friction Reduction in WingFlap System .................
Wing Flap Motor .....................................
Inspection of Aileron Sprocket and Chain ................
Fuel Selector and Crossfeed Valve Control Cables .........
Landing Light Installation ..............................
Aileron and Flap Installation ............................
Methods of Blocking Trim Cables .......................
Fuselage Cradle .......................................
Wing Installation ......................................
Empennage Installation .................................
Windshield Installation (Standard) .......................
Windshield Installation (Heated) .........................
WindshieldWiper .....................................
Storm Window Latch Installation........................
.........
.... .. ...
. . .. .. ...
.. ...
.... .
.... .
. . .. .. ...
. . .. .. ...
. .... . . ..
...... . .. . .
IA24
IB3
IB9
1B10
1B13
1B14
1B15
IB16
1B18
1B20
1B23
1C8
1C9
1C10
1FC11
1C12
1C13
1D3
ID4
IDII
1D12
1D16
1D18
1D20
1El
IE2
IE3
. . . . .
. .. ...
. . .. ...
. . ... ..
. .. ....
. . . . . ..
. . . . . . .
. .. ... .
. .. . .. ...
.......
.. . . . . . .
. . . . . . . .
. .. .. .. .
. ... .. . .
.. . . . . . .
. . . . . . . .
. .. .. .. .
. . . . . . . .
...... . . . . . . . . . . E5
................ IE23
.....................
.............. ........
....................
.....................
.....................
.....................
.....................
.....................
.....................
Side Window Installation ...................................................
Cabin Entrance Door Installation ............................................
Nacelle Wing Locker Latch Assembly ........................................
Cargo Door Latch Assembly ....................... ........................
Pilot's Door Latch Assembly ................................................
Aileron Balancing .........................................................
Elexator Balancing ........................................................
Friction Measurement ......................................................
Rudder Balancing ...................................... ...................
Rudder Balance Weight ocation ............................................
Skin Thickness and Material ................................................
IFI
1F3
IF4
1F5
IF9
1F16
1F17
1F19
1F22
1F22
1F24
1G5
1G7
IGI I
1G15
1G15
1G16
1G17
1G19
1G19
1G20
Revised:
5/3/84 1A6

NAVAJO
CHIEFTAIN
SERVICEMANUAL
LISTOF
ILLUSTRATIONS
(cont)
Figure Aerofiche
Grid No.
4-22. Typical
AccessPlates
and
Panels ...... .......................................... G23
4-23. Surface
Scratches.Abrasions
or Ground-In
Dirt ........................................ H3
4-24. Deep
Scratches.
Shallow
Nicks
andSmall
Holes................................................................H3
4-25. Mixing
ofEpoxy
Patching
Compound
........ ............................. ... 1.IH4
4-26. Welding
Repair
Method......................................................................................................
IH4
4-27. Repairing
ofCracks
.................................... ........
H5
4-28. Various
Repairs...................................................................................................................
H7
4-29. RepairofStress
Lines .........................................................................................................
1H8
4-30. RepairofImpacted
Damage...............................................................................................
H8
4-31. Installation
ofRadome
Erosion
Shield ........ ............................. H...1H14
5-1. Control
Column
Installation...... ..................................................... H24
5-2. CorrectMethod
ofInstalling
RodEnd
Bearings .................................... 1.....12
5-3 Aileron
andAileron
Trim
Controls ....... ............................. ..............114
5-4. Installation
ofBellcrank
Rigging
Tool ........ ............................ ............16
5-5 Installation
ofAileron
Rigging
Tool
....... ............................. ............16
5-6 Elevator
and
Elevator
Trim
Controls
..................................................................................
1112
5-7. Installation
ofElevator
Rigging
Tool ................................................................................
1115
5-8 Elevator
Travel
Stops..........................................................................................................
1115
5-8a. Safety
Wiring
Control
Surface
Stops..................................................................................
1115
5-9 Deleted
5-10. Methods
of Blocking
TrimCables
...... .......................... 11................18
5-11. CableRouting
onElevator
Tim Servo ........ ........................ ........... 1120
5-12. Rudder
PedalInsta llation....................................................................................................1123
5-13 Rudder
and
Rudder
Trim
Controls ................................. 2...............
5-14 Clamping
Rudder
Pedals
inNeutral
Position
......................................................................
4
5-15. Installation
of Rudder
Rigging
Tool ....... ......................... 1................
5-16 TrimScrewAssembly ................................................... J6
5-17. Control
Ped estal........................................................................................................8
5-18 Flap
Controls
(Dukes
System)
...... ......................................................... 110
5-19 FlapCircuit
Schematic
(Dukes
System)
5-20. FlapRigging
Check ...............................................
5-21 FlapSystem
Diagram
(Calco) ................................................
5-22 MotorAssembly
E.-plodedView
(Calco)
..........................................................................
J18
5-23 FlapControls
(Calco
System)
...... ................................................. 21
5-24 Deleted
5-25. Deleted
5-26. Deleted
5-27. Deleted
5-28a. FlapRigging
Adjustments
(Calco)............................................ 1K6
5-28b. UseofFlapRigging
Tool .......................... ..................
1K6
5-29a. CalcoFlap
System
Interconnect
.......................... K.....................K7
5-29b. CalcoFlap
System
Schematic
.......................... K...............K7
5-30. Amplifier
-Electric
Schematic
(Calco)
P/N8482
(S/N's 31-7952001
to 31-8252021
incl.)......................................................................
K9
5-30a. Amplifier
-Electric
Schematic
(Calco)
P/N8502M1
(SN's 31-8252022 and up) .......................................................................................... 1K
Revised:3/31/94 1A7

NAVAJOCHIEFTAINSERVICE
MANUAL
LIST OF ILLUSTRATIONS (cont)
Aerofiche
Figure Grid No.
5-31. Fabricated Bellcrank Rigging Tool ................ ........................... IL4
5-32. Fabricated Aileron and Elevator Rigging Tool ................................. L5
5-33. Fabricated Rudder Rigging Tool ............................................ IL6
6-1. Schematic of Power Pack Electrical System ................................... 2A 13
6-2. Schematic Diagram of Hydraulic System ..................................... 2A 14
6-3. Power Pack Installation .............. .................... .................. 2A23
6-4. Identification of Power Pack ................................................ 2A24
6-5. Location of Power Pack Components (Ozone) ................................ 2B1
6-6. Hydraulic Power Pack (Ozone) ................................. ............. 2B
6-7. Power Pack Manifold (Ozone) .............................................. 2B7
6-8. Power Pack Handle-Release Mechanism (Ozone) .............................. 2B12
6-9. Safetying Control Arm (Ozone) ............................................. 2B13
6-10. Timing of Selector Spool (Ozone) ............................................ B14
6-11. Handle-Release Adjustment (Ozone) ......................................... 2B14
6-12. Location of Power Pack Components (Wiebel Tool) ........................... 2B18
6-13. Hydraulic Power Pack (Wiebel Tool) ........................................ 2B20
6-14. Power Pack Manifold (Wiebel Tool) ......................................... B23
6-15. Power Pack Handle-Release Mechanism (Wiebel Tool) ......................... 2C
6-16. Safetying Control Arm (Wiebel Tool) ........................................ C4
6-17. Indexing of Selector Spool (Wiebel Tool) ..................................... 2C5
6-18. Handle-Release Adjustment (Wiebel Tool) .................................... 'C7
6-19. Landing Gear Selector Mechanism ................ ........................... 2C10
6-20. Hand Pump (Ozone) ..................... ................................... 2C
6-21. Hand Pump (Wiebel Tool)............................................. ..... 2C 16
6-22. Hydraulic System Installation ............................................... 2C 1
6-23. Gear Actuating Cylinder (Ozone) ............................................ C
19
6-24. Gear Actuating Cylinder (Wiebel Tool) ....................................... 2C21
6-25. Gear Door Actuating Cylinder (Ozone) ....................................... 2C23
6-26. Gear Door Actuating Cylinder (Wiebel Tool) ................ .................. 2D1
6-27. Hydraulic Filter ........................................................... 2D3
6-28. Hydraulic Pump.2D6
6-28. Hydraulic Pump ........................................................... 2
6-29. Power Pack Test Harness Schematic ......................................... 2
D10
7-1. Nose Gear Oleo Strut Assembly .............................................. 2D18
7-2. Nose Gear Steering Assembly (S N 31-7852141 and up) ...................... 2D20
7-3. Nose Landing Gear Installation ................. ................. ...... 2D24
7-4. Clamping Rudder Pedals in Neutral Position .................................. 2E5
7-5. Rudder Pedals Neutral Angle ............................................... E5
7-6. Aligning Nose Gear ........................................................ 2E5
7-7. Correct Method of Installing Rod End Bearings ............................... 2E8
7-8. Main Gear Oleo Strut Assembly ..................................... .. .2E9
7-9. Main Landing Gear Installation (Left) ........................................ 2E15
7-10. Actuator Cylinder ......................................................... 2E17
7-11. Aligning Main Gear ...................................... ................. 2E19
7-12. Landing Gear Circuit Diagram ............................... .......... 2E21
Revised: 3/5/84 1A8

NAVAJOCHIEFTAINSERVICEMANUAL
LIST OF ILLUSTRATIONS (cont)
Figure Aerofiche
Grid No.
7-13.
7-14.
7-15.
7-16.
7-17.
7-18.
7-19.
7-20.
7-21.
7-22.
7-23.
7-24.
7-25.
7-26.
7-27.
7-28.
7-29.
7-30.
7-31.
7-32.
7-33.
7-34.
7-35.
7-36.
7-37.
7-38.
7-39.
8-1.
8-2.
8-3.
8-4.
8-5.
8-6.
8-7.
8-8.
8-9.
8-10.
8-11.
8-12.
8-13.
8-14.
8-15.
8-16.
8-17.
Adjusting Main Gear Down Light Switch .....................................
Gear Warning Switches Installation ..........................................
Nose Wheel Assembly ......................................................
Main Wheel Assembly (Cleveland) ...........................................
Brake Installation (Typical) .................................................
Brake Disc Minimum Thickness .............................................
Wheel Brake Assembly(Cleveland 30-68 A and B) .............................
Wheel Brake Assembly (Cleveland 30-95 and 30-95a) ...........................
Wheel Brake Assembly Cleveland 30- 123 ....................................
Removal and Installation of Anchor Bolts ....................................
Brake Master Cylinder Assembly ...........................................
Parking Brake Valve Assembly .............................................
BleedingBrake(Typical)....................................................
Main Wheel Assembly ......... ............................................
Wheel Brake Assembly ...................................... ...............
Snow Shield Modification ..................................................
Rivet Head Grinding Limits ................................................
Wear Pad - Wear Limits ............................ .......................
Limitsfor Repadded Pressure and Back Plates ................................
Brake Disc Visual Check for Serviceable Limits ...............................
Fabncated Rivet Tool (Goodyear Only) ......................................
Fabricated Tool, CheckingNose Wheel Alignment ............................
Fabricated Tool, Checking Nose Gear Link Travel ............................
Fabricated Tool, Checking Main Gear Side Brace Link Travel ..................
Fabricated Tool, Checking Main Gear Toe-in Adjustment ......................
Nose Gear Wear Limits ....................................................
Main Gear Wear Limits ....................................................
Engine Cowling ...........................................................
Cowl Flap Transmission and Sender Assembly ................................
Propeller Installation .....................................................
Typical Nicksand Removal Method .........................................
Propeller Governor ........................................................
EngineInstallation ..................................................... 2H21
Schematic Diagram of Turbocharger System ..................................
Turbocharger Installation, PA-31-350 ........................................
Exhaust Waste Gate .......................................................
Fuel Injector .............................................................
Fuel-Air BleedNozzle ......................................................
Height of Spring in Distributor Block Tower ..................................
Contact Points ............................................................
Engine Timing Marks ......................................................
Timing LightConnected to Magneto .........................................
Timing Marks on Rotating Magneto (Present)................................
Timing Marks on Magneto Rotor (Earlier). ..................................
2F1
2FI
2F3
2F3
2F5
2F7
2F8
2F8
2F9
2F10
2F11
2F13
2F13
2F20
2F21
2F23
2F24
2G5
2G5
2G6
2G15
2G16
2G17
2G18
2G19
2G20
2G23
2H8
2H8
2H12
2H14
2H16
2H21
215
216
217
219
2113
2113
2113
2114
2114
2116
2116
Revised: 10/15/82 1A9

NAVAJOCHIEFTAINSERVICE
MANUAL
LIST OF ILLUSTRATIONS (cont)
Aerofiche
Figure Grid No.
8-18. Painted Tooth Centered in Timing Window................................... 2117
8-19. Cam End Viewof Magneto ................................................. 2118
8-20. Timing Mark on Rotor Aligned with Pointer (Right-Hand Rotation) ............. 2119
8-21. Timing LightConnected to Magneto ......................................... 2119
8-22. Timing LightConnected to Magneto and Breakers
........................ ... 2119
8-23. CheckingHarness Lead Continuity ................................... ...... 2119
8-24. CheckingHarness Lead Insulation Resistance ................................. 2124
8-25. ModifiedPliers.................................................... 2124
8-26. RemovingSpring From Lead Assembly ...................................... 2124
8-27. AssemblyTool ............................................................ 2J1
8-28. Using AssemblyTool ...................................................... 2J1
8-29. Ferrule Positioned Under Braid ............................................. 2J2
8-30. Ferrule Seating Tool 11-7074
........................................... .. 2J2
8-31. Position of 11-8627
Kit and Contact Springat Start of Installation .............. 2J2
8-32. Position of 11-8627
Kit and Contact Spring after Installation.................... 2J2
8-33. Lubricating Sleeve ................................................. 2J4
8-34. Lubricating Ferrule Shoulder ............................................... 2J4
8-35. Ignition System Schematic.................................................. 2J6
8-36. RemovingFrozen Spark Plug ............................................... 2J7
9-1. Fuel SystemSchematic..................................................... 2K4
9-2. Fuel Cell Installation (Main/Inboard) ................... ..................... 2K6
9-2a. FuelCellInstallation(NacelleOptional) ...................................... 2K7
9-3. Fuel CellInstallation (Auxiliary/Outboard) ................................... 2K10
9-4. Installation of Fuel Valve Drain Plate ........................................ 2K12
9-5. Fuel Gauge Adjustment Wires
............................................... 2K12
9-6. Fuel Selector Valve(Scott) ................................................. 2K16
9-7. CrossfeedValve ........................................................... 2K17
9-8. Fire WallShutoff Valve .................................................... 2K17
9-9. Fuel System Installation .................................................... 2K19
9-10. Adjustment of Crossfeed Valve .............................................. 2K24
9-11. Fuel Filter................................................................ 2K24
9-12. Electric Fuel Pump ........................................................ 2L2
9-13. Fuel CellTie Detail ........................................ ................ 2L12
9-14. Low Fuel Warning Sender Sealing .............................. ............. 2L13
10-1. Instrument Panel (Typical)
................................................. 3AI I
10-2. Instrument Air System Installation (Typical) .......................... ....... 3A12
10-3. Pilot's andCopilot'sGyro Installation withDeicer
(S/N 31-5001
to 31-7652123
incl.). 3A19
10-4. Pilot's andCopilot'sGyro Installation withDeicer
(S/N 31-7652124
and up) ........ 3A21
10-5. Pilot's GyroInstallation with
Deicer(S/N 31-5001
to 31-7652123
incl.) ... ......... 3A23
10-6. Pilot's GyroInstallation withDeicer(S/N 31-7652124
andup) .................... 3B1
10-7. Pilot's andCopilot'sGyro Installation (S/N 31-5001
to 31-7652123
incl.) ........... 3B2
10-8. Pilot's andCopilot'sGyro Installation (S/N 31-7652124
and up) .... ........ ..... 3B3
10-9. Pilot's GyroInstallation (S/N 31-5001
and 31-7652123
incl.) ................... 3B4
10-10. Pilot's GyroInstallation(S/N 31-7652124
and up) .................. ............ 3B5
10-11. Digital Clock (Optional).................. ................................ 3C6
lA10
Revised: 10/15/82

NAVAJO CHIEFTAIN SERVICE MANUAL
LISTOF ILLUSTRATIONS
(cont)
Figure Aerofiche
Grid No.
11-1. OverheadSwitch Panel..................................................... 3C14
11-2. Switch and Circuit BreakerControl Panel .................................... C15
11-3. Exploded View of Alternator (Prestolite) .................................... .. 9
11-4. Schematic- Alternator Paralleling System .................................... C20
11-5. Removalof Rectifier ....................................................... C22
11-6. Removal of Slip Ring End Bearing .................................... C2.
11-7. Removal of Drive End Head .................................... C.23
11-8. Removal of End Head Bearing ................. ........................ 3C2
11-9. Testing Rotor for Ground .................................... .C24
11-10. Testing Rotor for Shorts .................................... 4...
1-11. Installation of Bearing.................................... D
1
1-12. Installation of Rectifier .................................................... 3D 1
11-12. Installation of Rectifier .D1
11-13. Terminal Assembly(Prestolite) ................... ................. ... .D1
11-14. Slip Ring End BearingAssembly .................................... D...
11-15. Testing Alternator ....... ............................. D.
11-16. Brush Installation .................................... D..
11-17. Internal Wiring Diagram .................................... D..
11-18. Regulator Diagram (Lamar) ................................................ 4
11-19. Testing Regulator(Lamar) .................................................. D
11-20. Adjusting Regulator(Lamar) ................................................ 0D9
11-21. Application of Overvoltage Control .......................................... 3D1O
1-22. TestingOvervoltageControl ................................................ DI0
11-23. Exploded ViewStarting Motor ............................................... 3D12
-2. TurnExploded Starting
Motor Commutator ................................................
11-24. Turning Motor Commutator D1J
11-25. Testing Motor Armature for Shorts .......................... D..........14
11-26. Testing Motor Fields for Grounds ........................................... 3D15
11-2. Testing Motor Fields for Grounds...........................................5
11-27. No-Load Test Hookup .D15
I -28. Stall-Torque Hookup ...................................................... 3D17
11-29. Landing Light ............................................................. 3D
23
12-1. Two Year, Magnesium BatteryConnections ................................... 4A 11
12-2. Five Year, Lithium Battery Connections (Garrett)
................ 4A12
12-3. Emergency Locator Transmitter Schematics (Garrett) ........................ 4A18
12-4. Communications Components ELT Schematics (Early Models) ........ 4A19
12-5. Communications Components ELT Schematic (Later Models) ................... 4A20
12-6. Emergency Locator Transmitter Schematic (Narco) ............... 4A21
12-7. ELT Portable Folding Antenna (Narco) ...................................... 4A22
12-8. ELT Using Fixed Aircraft Antenna (Narco) ................................... 4A22
12-9. Avionics Master and Emergency Switch Circuit
............................... 4A
NOTE
Index for Electrical
System Schematics
may be foundin Table
XI-I, Grid 3C18.
Revised: 10/5/83

NAVAJO
CHIEFTAINSERVICEMANUAL
LIST OFILLUSTRATIONS (cont)
Aerofiche
Figure Grid No.
13-1. Heating and VentilatingSystem........................................................................................... 4B10
13-2. Heater Assembly and Combination Air Blower .................................................................4B14
13-3. Diagrammatic Cut-a-way of Heater ShowingWhirling Flame Action...............................4B16
13-4. Diagrammatic Cut-a-way of Heater to ShowWhirling Flame Action ...............................4B 16
13-5. Left Side View-Duct Switch .............................................................................................4B19
13-6. Wiring Schematic ............................................................................................................. 4B19
13-7. VentBlower Power Circuit ............................................................................................. 4B20
13-8. Heater Power Circuit ............................................................................ ............. 4B20
13-9. Spark Plug Fixture ......................................................................................................... 4B22
13-10. Wiring - Test Setup ..................................................................................................... 4B22
13-11. Spark Plug Gap Adjustment and Tool .................................................................................4B24
13-12. Spark Plug Gap Adjustment and Tool .................................................................................4C
13-13. Test Setup for Fuel Regulator and Shutoff Valve ...............................................................4C1
13-14. Suggested Design for Seal Plate. Plugs and Caps for Combustion Tube
Leakage Test...................................................................................... ..................4C5
13-15. Test Setup - Combustion Air Pressure Switch ................................................................ 4C7
13-16. Deleted
13-17. Exploded Viewof Heater Assembly ...................................................................................4C13
13-18. Exploded View of Combustion Air Blower and Motor Assembly......................................4C16
13-19. Suggested Setup for Heater Operation Test.........................................................................4C18
13-20. Wiring Connections for Heater Operation Test ..................................................................4C18
14-1. Oxygen System Installation (Forward - 6 Outlets)
..............................................................4E7
14-2. Oxygen System Installation (Forward -8.9 and 10Outlets) .............................................4E7
14-3 Oxygen SystemInstallation (Aft - 6 Outlets) .....................................................................4E8
11-4. Oxygen System Installation (Aft - 8. 9 and 10Outlets) ......................................................4E8
14-5. Oxygen System Installation (S/N 31-7752001and up).......................................................4E9
14-5a. Oxygen Tubing Installation ......................................................................... .. ........ 4E10
14-6. Electric Propeller Deicer Installation...................................................................................4E17
14-7. Electrical Diagram Showing Cycle Sequence- Phase I .....................................................4E19
14-8. Electrical Diagram Showing Cycle Sequence -Phase II ....................................................4E19
14-9. Electrical Diagram Showing Cycle Sequence -Phase m ..................................................4E21
14-10. Electrical Diagram Showing Cycle Sequence - Phase IV ..................................................4E21
14-11. Typical Use of Dial Indicator ........................................................................................... 4E23
14-12. Centering of Brushes onSlip Rings ..................................................... .............................
4E23
14-13. Wiring Schematic. Electric Propeller Deicing System ......................................................4F2
14-14. Propeller DeicerBrush Assemblies.................................................................... 4F3
14-15a. Angle of Contact Brushes to Slip Rings .............................................................................4F5
14-15b. Brush AlignmentTemplate............................................................................................... 4E5
14-16. Repair of Lead Strap ...........................................................................................................4F5
14-17. Installation ofDeicer Boots ............................................................................................. 4F7
14-18. Wrinkled Deicers ................................................................................................................4F7
14-19. Sealer Application ( Boot) ..................................................................................................4F9
14-20. Sealer Application (Lead Straps)...............................................................................4F9 4F9
14-21. Propeller Blade Low Pitch Position..................................................................................... 4F11
14-22 Propeller Blade in Feather Position ....................................................................... 4F11
4F11
Revised:3/31/94 1A12

NAVAJOCHIEFTAINSERVICE
MANUAL
LIST OF ILLUSTRATIONS (cont)
Figure Aerofiche
Grid No.
14-23. Pneumatic Deicer System Installation (Typical) (S/N 31-5001 to
31-7652123 inclusive) ................................................... 4F 19
14-24. Pneumatic Deicer System Installation (Typical) (S/N 31-7652124 to
31-7952250 inclusive) ................................................... 4F20
14-25. Pneumatic Deicer System Installation (Typical) (S/N 31-8052001 and up) ........ 4F21
14-26. Pneumatic Deicer Boots Operation .......... ....... ......................... 4F24
14-27. Pneumatic Deicer System Schematic (S/N 31-50001 to 31-7652123 inclusive) ..... 4F24
14-28. Pneumatic Deicing System Schematic (S/N 31-7652124 to 31-8052004 inclusive) .. 4G1
14-29. Pneumatic Deicer System Schematic (S/N 31-8052005 and up) .................. 4G2
14-30. Air Conditioning Schematic Diagram ........................................ 4G14
14-31. Air Conditioning System Installation ........................................ 4G18
14-32. Service Valves............................................................. 4G20
14-33. Manifold Set Operation ............ ........................................ 4G22
14-34. Test Gauge and Manifold Set ............................................... 4G24
14-35. Leak Test Hookup ......................................................... 4G24
14-36. Evacuation Hookup ........................................................ 4H2
14-37. Charging Stand ............................................................ 4H4
14-38. Charging Hookup ........................................................ 4H8
14-39. Compressor and Fabricated Oil Dipstick ..................................... 4H 10
14-40. Magnetic Clutch Installation ............................................... 4H12
14-41. Expansion Valve (Typical) .................................................. 4H14
14-42. Service Points (Air Conditioning System) ...................................... 4H16
14-43. Air Conditioning Outlets ................................................... 4H17
14-44. Positioning of Airflow Probe ............................................... 4H18
14-45. Sealing of Ducts ...................................................... .4H19
14-46. Installation of VOI SHAN Seals ............................................. 4H20
14-47. Synchrophaser Installation .................................................. 417
14-48. Strobe Sensor ........................................................... 4112
14-49. Pulse Generator ........................................................... 4114
14-50. Computer Assembly ....................................................... 4115
14-51. Fabricated Test Box ....................................................... 4116
14-52. Electrical Schematics ....................................................... 4116
14-53. Strobe Sensor Internal Wiring Test Unit ...................................... 4117
14-54. Strobe Sensor Simulator ................................................... 4117
14-55. Patch Cable and Test Terminal ............................................. 4118
14-56. Pulse Generator Simulator .................................................. 4118
14-57. Synchrophaser Schematic (S/N 31-7852038 and up) ............................ 4119
14-58. Typical Cargo Loading ..................................................... 4121
14-59. Cargo Loading Placard ..................................................... 4122
14-60. Cargo Furnishing Installation ............................................... 4123
14-61. Location of Extrusion Holes ............................................... 4124
14-62. Commuter. Corporate and Executive Interiors ................................. 4J9
Revised:
2/8/82 1A13

NAVAJOCHIEFTAIN
SERVICE
MANUAL
LIST OF TABLES
Table Aerofiche
Grid No.
11-1. LeadingParticulars and Principal Dimensions .............................. BI
11-11. RecommendedNut Torques (Inch-Pounds) ........................ ......... 1B6
11-111. Flare FittingTorque Chart ...................................... ..... IB
II-IV. RecommendedLubricatingOils ........................................... IC2
11V. Thread Lubricants............................................ ... .1C5
II-VI. List ofConsumable Materials ............................................ IC14
II-VII. Indicated Oxygen Pressures for Given Ambient Temperatures................. 1D1
II-VIII. DecimalConversion Chart ............................................... ID2
II-IX. Decimal/Millimeter Equivalents of Drill Sizes
............................... ID5
II-X. Conversion Charts....................................................... 1D
II-XI. Maximum DistanceBetweenSupports Fluid Tubing ......................... 1D10
III-I. InspectionReport ..... ............................................ IE6
IV-I. BalanceWeights
.................................................. IG17
IV-II. List of Materials (Thermoplastic Repairs)
................................... 1H2
V-I. Cable RiggingTension Vs. Temperature .................................... IH19
V-II. Control Surface Travel and Cable Tension.................................. IH19
V-III. Troubleshooting Chart (Surface Controls) .................................. IK14
VI-I. Leading Particulars, Hydraulic Power Pack (Ozone) ............... .......... 2A17
VI-II. Leading Particulars, Hydraulic Power Pack (WiebelTool) .................... 2A
18
VI-Ill. Inspectionand Repair, Hydraulic Pump.................................... 2D7
VI-IV. Troubleshooting Chart (Hydraulic System) ................................. 2DII
VII-I. InspectionLimits....................................... ........... 2G
1
VII-II. Troubleshooting Chart (Landing Gear System) .............................. 2G10
VIII-I. Propeller Specifications ............................................ 2H
13
VIII-II. Turbocharger Installation Torque Values in Inch-Pounds ..................... 2H24
VIII-III. CouplingTorques ............ ........................................... 2J7
VIII-IV. Troubleshooting Chart (Engine)........................................... 2J12
IX-I. Fuel QuantitySender Resistance Limits .................................... 2K14
IX-II. Wear Limitsfor ElectricalFuel Pump...................................... 2L4
IX-III. Fuel CellRepair Equipment Lists ......................................... 2L10
IX-IV. Troubleshooting Chart (Fuel System) ...................................... 2L14
X-I. PressureSystem................................................ .. 3B7
X-II. Deleted ........................ ............................... 3B8
X-III. Deleted ......................................................... 3B9
X-IV. Rate ofClimb Indicator.............................. ..... 3B10
X-V. Altimeter........................................ .................... 3B12
X-VI. Airspeed
Tubes and Indicator ......................................... .3B13
X-VII. MagneticCompass ................................. 3B15
X-VIII. Manifold Pressure Indicator ............................................. 3B16
X-IX. Tachometer
........................ .... ........................ 3B17
X-X. EngineOil Pressure Gauge ........................... 3B18
X-XI. Fuel Pressure Gauge ............................... .......... 3B19
X-XII. Deleted ......... .......... .. ................................ 3B20
X-XIII. Fuel Quantity Indicators ............................ 3B22
X-XIV. Oil Temperature Indicators ...................... .. 3B23
Revised:5/3/84 1A14
1A14

NAVAJO
CHIEFTAINSERVICEMANUAL
LIST OF TABLES (cont) 0
Table
X-XV.
X-XVI.
X-XVII.
X-XVIII.
XI-I
Xl-II.
xi-m.
XI-IV.
XI-V.
XI VI.
XI-VII.
XI-VIII.
XI-IX.
XI-X.
XI-XI.
XIII-I.
XIV-I.
XIV-II.
XIV-III.
XIV-IV.
XIV-V.
XIV-VI.
XIV-VII.
XIV-VIII.
XIV-IX.
XIV-X.
XIV-XI.
XIV-XII.
XIV-XIII.
XIV-XIV.
XIV-XV.
XIV-XVI.
Aerofiche
Grid No.
Exhaust
GasTemperature
Gauge...... ................................................... 3C
Cylinder
Head
Temperature
Gauge
..........................................................................
3C2
FuelFlow
Gauge............................................................................................... 3C3
Instrument
Markings...............................................................................................
3C5
Alternator
Test
Specifications
(Prestolite)
...................................................................
3C18
Alternator
BeltTension.................................................................................................
3D11
Starting
Motor
TestSpecifications
....................................................................... 3D18
Hydrometer
Percentage
Guide...... ................................................... 3D18
Troubleshooting
Chart(Electrical
System)
......... ................................................3EII
Circuit
Load
Chart ....................................................................................................
3E16
LampReplacement
Guide
.............................................................................. 3E19
Component
Values
toObtainBalance
LightOutput
Intensity......................................
3E20
Electrical
Wire
Coding............................................................................................
3E21
Electrical
Symbols
......................................................... .......................... 3E22
Index
-Electrical
System
Schematics
............................................................................
3E23
Troubleshooting
Chart(Heating
System) ......... ................................................ 4C23
Oxygen
System
Component
Limits ........................................................................
4E6
Troubleshooting
Chart(Oxygen
System)......... ................................................ 4E14
Required
Materials
for Repair
ofPropeller
Deicer
........................................................
4F2
Electrical
Resistance
................................................................... 4F8
Troubleshooting
Chart(Propeller
Deicer
System)........................................................4F12
Operating
Pressures................................................................
..... G3
Material
andSupplies
forCold
Repair .......... ............................................... 4G5
Troubleshooting
Chart(Pneumatic
DeicerSystem)
.....................................................
4G12
Temperature
Pressure
Chart ............................................................................ 4G15
Aluminum
Tubing
Torque.....................................................................4G20
System
Vacuum
Chart ...................................................................................................
4G23
Compressor
Oil
Charge................................................................................................
4H7
BeltTensions
(TIO-540-J2BD
-Engine)
(With
Freon
Compressor
Installed ..............
4H9
AirVelocity
Chart
........................................................................ 4H17
Troubleshooting
Chart
(AirConditioner)......... .................................................4H21
Troubleshooting
Chart
(Engine
Synchrophaser)
.......................................................
4120
Revised: 331/94 1A15

SECTION
I
INTRODUCTION
Aerofiche
GridNo.
Paragraph
1-1.
1-2.
1-3.
General ..............
Scope of Manual .........
Description .............
1-4. Fuselage .........
1-5. Wing ..........
1-6. Empennage ......
1-7. Flight Controls ....
1-8. Hydraulic System .
1-9. Landing Gear .....
1-10. Engines and Propellers
1-11. Fuel System .....
1-12. Instruments ......
...... 1A17
1A17
.............................
................................
.................................
.................................
.................................
.................................
.................................
.................................
................................
.................................
.................................
.................................
1A17
1A17
1A17
1A17
1A17
1A17
1A17
1A18
1A18
1A18
1A18
1-13. Electronic Equipment
1-14. Heating and Ventilating System
gSystem ...... 1Al8
Revised:
3/11/81
1A16

PIPERNAVAJO
SERVICE MANUAL
SECTION I
INTRODUCTION
1-1.GENERAL.
This
manual
contains
serviceandmaintenance
instructions
forthe PiperPA31-350,
designed
andmanufactured
asa versatile
aircraft
intheair taxi,aircargo,
commuter
andexecutive
aviation
fields,
bythe
PiperAircraftCorporation,
Vero
Beach,
Florida.
1-2.SCOPE
OF MANUAL.
Sections IIandIIIcomprise
the servicepartof thismanual,
whereas
Sections
IV
through
XIV
comprise
themaintenance
instructions.
Theservice
instructions
include
ground
handling,
servicing
andinspection.
Themaintenance
instructions
foreachsystem
include
troubleshooting,
removal
andinstallation
of components,and correctivemaintenance
and testing;each major systemof the airplaneis coveredin a
separate section. Only qualified personnel are to perform the operations described in this manual.
The description
ofthe airplane
included
in thissectionis limitedto general
information.
SectionII gives
leading
particulars
and
principal
dimensions,
while
eachmajor
system
isdescribed
inits appropriate
sectionof
the manual.
1-3. DESCRIPTION.
The Piper PA-31-350
is a versatile, twin-engine,low-wingmonoplaneof all-metal
construction.
The following
paragraphs
provide
descriptions
ofthe major
components
and
systems.
1-4.FUSELAGE.
The fuselageis a semi-monocoque
structurethat consistsof three basic units: the nose
section,the cabinsection
andthetailconesection.
1-5.WING.
The laminar
flowwing
is of all-metal
stressed-skin,
fullcantilever
design,
consisting
of twowing
panels boltedtogetherat the centerof the fuselage.
The wingtips are removable.
The aileronare cable and
pushrodcontrolled
andarestatically
balanced.
The
trailing
edgewingflaps
are electrically
operated.
1-6.EMPENNAGE.
The empennage
consistsof the verticalstabilizer(fin),rudderwithtrimtab, horizontal
stabilizer,
andelevator
withtrimtab.Thecontrol
surfaces
arecablecontrolled,
andarestatically
balanced.
1-7.FLIGHT
CONTROLS.
The flight
controls
areconventional,
consisting
of dualcontrol
wheels
thatoperate
the ailerons
and
elevator,
anddualfoot
pedals
thatoperate
therudder.
Thetrimtabs
foreach
controlareoperated
by wheels
orknobs
located
inthe control
pedestal.
1-8.
HYDRAULIC
SYSTEM.
Two
separate
hydraulic
systems
areincorporated
in theairplane.
Themainsystem
incorporatesa hydraulicPower Pack that operatesthe landing gear and inboard maingear door-actuating
cylinders.
The second
system
operates
theairplane's
brakesystem.
1-9.LANDING
GEAR.
The tricyclelandinggear system
is hydraulically
operated
and fullyretractable
with
doorsthatcompletely
coverthegearwhen
retracted.
Thegears
are air-oil
typeunits.
Revised: 3/31/94 INTRODUCTION
1A17

NAVAJOCHIEFTAIN
SERVICE
MANUAL
1-10. ENGINESANDPROPELLERS. The airplane ispoweredby two Avco-Lycoming
six cylinder,direct
drive, wet sump, horizontally opposed, fuel injected, turbocharged engines. The left engine rotation is in
the right hand direction, whilethe right enginerotates in the left hand direction. The propellersare Hartzell
full feathering,constant speedthree bladed units controlled by a governor
mounted on each engine.
1-11. FUEL SYSTEM.The fuel system consistsof four bladder-type cellslocated in the wingswith a total
fuel capacity of 192 U.S. gallons. Incorporated in the system are NACAtype anti-icing,non-siphoning
vents,fuel filters,electric auxiliary fuel pumps, boost pumps, enginedriven pumps and a crossfeed
system.
1-12. INSTRUMENTS.
Provisions for the instrument installation includes panels for engine instruments
and advance flight instruments, as well as space for an optional second set of flight instruments for the
copilot. The panelisshock-mountedto minimize
vibration to the instruments.
1-13. ELECTRONICEQUIPMENT.Provisionfor electronic equipment includesvarious combinations of
radio installations,AutoPilot and radar.
1-14. HEATINGANDVENTILATING
SYSTEM.Heated air for the cabinand defroster isobtained from
a 50,000 B.T.U. Janitrol Heater installedin the nose section. Fresh air for the cabin interior is obtained
from two individual sources;one from an intake in the nose section and the other from an intake located
outside on the forward bottom of the fuselage.
Revised: 10/15/82 INTRODUCTION
IA18

1A19
INTENTIONALLY LEFT BLANK

1A20
INTENTIONALY LEFT BLANK