Wiring Diagram for Piper PA-31 Navajo
Piper PA-31 Navajo · Wiring Diagram
Overview
This document serves as a wiring diagram for the Piper PA-31 Navajo aircraft. It provides detailed electrical schematics that are essential for understanding the aircraft's electrical system. The wiring diagram is intended for use by maintenance personnel and technicians who require accurate information for troubleshooting and repairs. It includes various electrical components, their connections, and specifications necessary for proper maintenance and safety compliance.
- The wiring diagram is essential for understanding the electrical system of the Piper PA-31 Navajo.
- It includes detailed schematics for all electrical connections and components.
- Specifications for electrical components are provided, including voltage and amperage ratings.
- A troubleshooting guide helps diagnose common electrical issues.
- Safety precautions must be followed when working with the aircraft's electrical system.
Document
Source
Originally published by piperowner.org. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Wiring Diagram
- Pages
- 244
- File size
- 2.9 MB
- Publisher
- piperowner.org
Common. Rarer than 3% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the Piper PA-31 Navajo.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins
- Type Certificate (TCDS)
Free — save the PA-31 Navajo to your watchlist and track it in one place.
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In this document
Electrical System Overview
This section outlines the general layout of the electrical system in the Piper PA-31 Navajo, including the power sources, distribution, and major components such as the battery, alternators, and circuit breakers.
Wiring Connections
Detailed diagrams illustrate the wiring connections between various components of the electrical system. This includes connections for avionics, lighting, and other electrical systems, ensuring that technicians can follow the correct wiring paths.
Component Specifications
This section lists specifications for key electrical components used in the PA-31 Navajo, including voltage ratings, amperage, and part numbers for replacement parts.
Troubleshooting Guide
A troubleshooting guide is included to assist technicians in diagnosing common electrical issues. This guide provides step-by-step procedures for identifying and resolving problems within the electrical system.
Safety Precautions
Important safety precautions are outlined to ensure that maintenance personnel follow proper procedures when working with the electrical system, including disconnection protocols and handling of electrical components.
Safety notes
- Always disconnect the battery before performing maintenance on the electrical system.
- Follow proper grounding procedures to avoid electrical shock.
- Use only manufacturer-approved components for replacements.
Full document text
753 771 PIPER PITCH TRIM Service Manual PIPER AIRCRAFT CORPORATION PIPER AIRCRAFT CORPORATION LOCK HAVEN, PENNSYLVANIA 17745 THIS SERVICE MANUAL SUPERSEDES ALL PREVIOUS PITCH TRIM SERVICE MANUALS ISSUED PRIOR TO AUGUST 1972. Published by PUBLICATIONS DEPARTMENT Piper Aircraft Corporation 753 771 Issued: March 1970 Reissued: August 1972 PIPER PITCH TRIM SERVICE MANUAL REVISIONS ISSUED Current, permanent and temporary revisions to this Pitch Trim Service Manual reissued August 1972 are as follows: 753 771 (PR730228) 753 771 (PR731109) 753 771 (PR750603) 753 771 (PR760712) 753 771 (PR770225) 753 771 (PR771220) Permanent Revision Permanent Revision Permanent Revision Permanent Revision Permanent Revision Permanent Revision Dated February 28, 1973 Dated November 9, 1973 Dated June 3, 1975 Dated July 12, 1976 Dated February 25, 1977 Dated December 20, 1977 Revised: 12/20/77. iii/iv PIPER PITCH TRIM SERVICE MANUAL FOREWORD This service manual is provided as a guide for installing, servicing and maintaining all Electric Pitch Trim Systems used in Piper airplanes. The information presented in this manual has been divided into four parts, each consisting of six (6) sections. An index is located in the front of the manual and preceding each section to provide a quick reference. The information compiled in this manual will be kept current by revisions distributed to the manual owners through their local Piper Dealer or Distributor. REVISION There will be two (2) types of revisions used to keep this manual current. The material compiled in these revisions will consist of information necessary to maintain the present equipment, therefore, it is imperative that this material be inserted in the service manual at the time it is received. I. Temporary Revision This type revision will be distributed at anytime it is necessary to forward Technical Servicing Information to the field. The temporary revision will usually consist of one or two pages which may be inserted in the front of the manual. These revisions will include deletions and additions of material pertinent to dif- ferent paragraphs of the service manual, therefore, when the temporary revision is received, review the manual and mark the affected paragraph with the code date of the latest revision for a ready reference. II. Permanent Revision This type revision will supersede all previous temporary revisions. These revisions will be of complete page replacement and shall be inserted in the service manual as per the instructions given below. 1. Replace the obsolete pages with revised pages of the same page number. Issued: 8/25/72 V PIPER PITCH TRIM SERVICE MANUAL 2. Insert pages with page numbers followed by a small letter in direct sequence with the same common page number. 3. Insert pages with page numbers followed by a capital letter in direct sequence with the same common page number but after any pages with the same common page number followed by a small letter. III. Identification of Revised Material Revised text and illustrations shall be indicated by a black vertical line along the left hand margin of the page opposite the change. A line opposite the page number or section title and printing date will indicate that the text or ill- ustration was unchanged, but the material was relocated to a different page. Newly added material shall be identified by an arrow pointing toward either the text, text heading or illustration. When material is removed, an arrow will point away from the area from which the material was removed. Symbols will indicate only current revisions with changes and additions to or deletions of existing text and illustrations. Changes in capitalization, spell- ing, punctuation or the physical location of the material on the page will not be identified by symbols. vi Revised: 6/3/75 I PIPER PITCH TRIM SERVICE MANUAL TABLE OF CONTENTS PART I P.E.T. ( PIPER ELECTRIC TRIM ) SYSTEMS PA-28 and PA-32 Series; PA-24, PA-30 and PA-39 Series; and PA-23 Series | INTRODUCTION AND DESCRIPTION. . THEORY OF OPERATION REMOVAL AND INSTALLATION IV ADJUSTMENT PROCEDURES AND OPERATIONAL CHECKS V TEST EQUIPMENT VI SCHEMATICS .1-1 2-1 • 3-1 ... 4-1 • " 5-1 6-1 " PART II ALTIMATIC III, IIIB and IIIB-I ELECTRIC TRIM SYSTEMS VII INTRODUCTION AND DESCRIPTION 7-1 VIII THEORY OF OPERATION. 8-1 . • • IX REMOVAL AND INSTALLATION 9-1 " × × ADJUSTMENT PROCEDURES AND OPERATIONAL CHECKS. . . 10-1 TEST EQUIPMENT 11-1 XII SCHEMATICS 12-1 " Revised: 12/20/77 vii PIPER PITCH TRIM SERVICE MANUAL TABLE OF CONTENTS (Cont.) PART III M.E.T. MANUAL ELECTRIC TRIM | SYSTEMS PA-23-250; PA-24, PA-30 and PA-39 and PA-34 Series viii XIII INTRODUCTION AND DESCRIPTION XIV THEORY OF OPERATION XV REMOVAL AND INSTALLATION 13-1 " • 14-1 15-1 XVI ADJUSTMENT PROCEDURES AND OPERATIONAL CHECKS. . .16-1 XVII TEST EQUIPMENT . • XVIII SCHEMATICS 17-1 18-1 PART IV ALTIMATIC III, IIIB and IIIB-I ELECTRIC TRIM SYSTEMS [DUAL CONTACT TYPE TRIM SENSOR) PA-23-250 (Six Place) XIX INTRODUCTION AND DESCRIPTION XX THEORY OF OPERATION • XXI REMOVAL AND INSTALLATION. XXII ADJUSTMENT PROCEDURE AND OPERATIONAL CHECKS XXIII TEST EQUIPMENT XXIV SCHEMATICS NOTE Refer to appropriate AFCS Service Manuals for all other Electric Trim System information. 19-1 20-1 " • 21-1 . . 22-1 23-1 24-1 Revised: 12/20/77 PIPER PITCH TRIM SERVICE MANUAL LIST OF ILLUSTRATIONS Figure Page 2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 3-1. 3-2. Servo Selector Switch Chain Type Pitch Servo Servo Selector Switch Rack and Pinion Pitch Servo Plate Sensor Equal Elevator or Stabilator Cable Tension Plate Sensor Unequal Elevator or Stabilator Cable Tension Pendulous Sensor Equal Elevator or Stabilator Cable Tension Pendulous Sensor Unequal Elevator or Stabilator Cable Tension Servicing Aids Typical Stabilator Holding Fixture 2-9 2-8 2-8 2-9 3-3. 3-4 PA-23-250, PA-24 and PA-30 Trim Servo Cable Routing PA-23-250, PA-24 and PA-30 Pendulous Trim Sensor. 3-5. PA-23-250, PA-24 and PA-30 Positioning and Alignment of Plate Type Trim Sensor. 3-8 3-6.
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PA-28 Trim Servo Cable Routing 3-8 3-7. 3-8. PA-28 and PA-32 Trim Servo Cable Routing Plate Sensor with Amplifier 3-19 3-20 3-9. Pendulous Sensor with Amplifier 3-20 3-10. Electric Trim Stop Sensor Assembly Installation (PA-28-181, PA-32R-300, PA-32RT-300 and PA-32RT-300T) 4-1. P. E. T. Trim Servo Clutch Adjustment 4-5 4-2. Switch Adjustment Cams 4-5 13322 1 1-227 22222 243 2-10 3-22 4-3. PA-23-250, PA-24 and PA-30 P. E. T. -1 Manual Electric Trim Control Wheel Switch 4-6 4-4. PA-23-250, PA-24 and PA-30 P. E. T. -1 Manual, P. E. T. -1 Automatic and P. E. T. -2 Automatic Electric Trim Control Wheel Switch 4-5. 4-6. 5-1. 6-1. 6-2. 6-3. 6-4. 6-5. 6-6. 8-1. 8-2. 8-3. PA-28 and PA-32 Manual Electric Trim Control Wheel Switch Electric Trim Stop Sensor Assembly Test Equipment P. E. T. Series Pitch Trim Servo Motor Windings P. E. T. -1 Manual Electric Trim Schematic . P. E. T.-1 Automatic Electric Trim Schematic P. E. T.-2 Automatic Electric Trim Schematic P.E.T.-1 Manual Electric Trim Schematic (Electric Trim Stip Sensor PA-28-181, PA-32R-300, PA-32RT-300 and PA-32RT-300T) P. E. T. -1 Manual Electric Trim Schematic Plate Sensor Equal Elevator or Stabilator Cable Tension Plate Sensor Unequal Elevator or Stabilator Cable Tension Pendulous Sensor Equal Elevator or Stabilator Cable Tension Revised: 12/20/77 4-6 4-6a/4-6b 5-2 5-2 6-2 6-2 6-3 6-4 6-5 6-5 8-5 8-5 8-6 ix PIPER PITCH TRIM SERVICE MANUAL LIST OF ILLUSTRATIONS (cont.) Figure Page 8-4. 9-1. Pendulous Sensor Unequal Elevator or Stabilator Cable Tension Servicing Aids 8-6 9-1 9-2. Typical Stabilator Holding Fixture 9-2 9-3. 9-4. PA-23-250, PA-24, PA-30 and PA-39 Trim Servo Cable Routing PA-23-250, PA-24, PA-30, PA-31P, PA-34-200 and 9-9 9-5. PA-39 Trim Sensor PA-31 Trim Servo Cable Routing 9-9 9-10 9-6. PA-31 and PA-31-350 Trim Servo Cable Routing 9-10 9-7. PA-31 and PA-31-350 Pendulous Trim Sensor 9-17 9-8. PA-31P Trim Servo Cable Routing. 9-17 9-9. PA-31P Trim Servo Amplifier Replacement 9-19 9-10. PA-32 Trim Servo Cable Routing 9-19 9-11. Trim Servo Amplifier Replacement (1D345) 9-20 9-11a. PA-23-250, PA-24, PA-30, PA-31, PA-31-350, PA-31P and PA-39 Trim Warning System 9-26a 9-12. Plate Sensor Without Amplifier 9-26b 9-13. Pendulous Sensor Without Amplifier 9-26b 9-14. PA-34-200 Trim Servo Cable Routing 9-28 10-1. III Series Trim Servo Clutch Adjustment 10-3 10-2. Clutch and Clutch Solenoid Coil Adjusting Details 10-4 10-3. Switch Adjustment Cams 10-7 10-4. PA-23-250, PA-24 and PA-30 AltiMatic II 10-7 10-5. PA-23-250 AltiMatic III . 10-8 10-6. PA-23-250 AltiMatic III B 10-8 10-7. PA-23-250, PA-24 and PA-30 AltiMatic III 10-9 10-8. PA-24 and PA-30 AltiMatic III . 10-9 10-9. PA-24, PA-30 and PA-39 AltiMatic III B 10-10 10-10. PA-32 AltiMatic III 10-10 10-11. PA-31 AltiMatic III and AltiMatic III B (With Trim Relay) 10-11 10-12. PA-31 and PA-31P AltiMatic III B (Without Trim Delay) 10-11 10-13. PA-24-260 and PA-39 AltiMatic III B-1 10-11a 10-14. PA-31 and PA-31P AltiMatic III B-1 10-11a 10-15. PA-31-350 AltiMatic III B-1 10-11b 10-16. PA-34-200 AltiMatic III B-1 10-11b 11-1. Test Equipment 11-2 11-2. Trim Servo Test Plug, Piper P/N 757 299 11-2 12-1. III Series Automatic Pitch Trim Servo Motor 12-1 12-2. III Series Automatic Electric Trim Schematic AltiMatic II AutoPilot 12-3 ✗ Revised: 2/28/73 PIPER PITCH TRIM SERVICE MANUAL LIST OF ILLUSTRATIONS (cont.) Figure Page 12-3. III Series Automatic Electric Trim Schematic (Without Trim Relay) AltiMatic III and III B AutoPilots 12-4 12-4. III Series Automatic Electric Trim Schematic (With Trim Relay), PA-31 Serial Nos. 31-1 to 31-424 12-5 12-5. III Series Automatic Electric Trim Schematic AltiMatic III and III B AutoPilots 12-6 12-6. III Series Automatic Electric Trim Schematic AltiMatic III B-1 AutoPilots 12-7 12-7. III Series Automatic Electric Trim Schematic AltiMatic III B-1 AutoPilots, PA-34-200 12-8 12-8. III Series Automatic Electric Trim Schematic AltiMatic III B-1 AutoPilots, PA-31-350 12-9 15-1. Servicing Aids 15-2 15-2. 15-3. PA-23-250, PA-24-260, PA-30 and PA-39 Trim Servo Cable Routing PA-34-200 and PA-34-200T Trim Servo Cable Routing 15-3 15-5 16-1. M. E. T. 3 Trim Servo Clutch Adjustment . 16-2 16-2. Clutch Adjustment Detail 16-3 16-3. PA-23-250 M. E. T. - 3, Control Wheel Switch 16-4 16-4. 16-5. 18-1. PA-24-260, PA-30, PA-39 M. E. T. - 3, Control Wheel Switch PA-34-200 and PA-34-200T M. E. T. - 3, Control Wheel Switch M. E. T. - 3 Series Pitch Trim Servo Motor 16-5 16-5 18-1 18-2. M. E. T. 3 Manual Electric Trim Schematic, PA-23-250, PA-24-260, PA-30 and PA-39 18-2 18-3. M. E. T. - 3 Manual Electric Trim Schematic, PA-34-200 and PA-34-200T 18-2 20-1. 20-2. 21-1. Plate Sensor (Dual Contact) Equal Stabilator Cable Tension Plate Sensor (Dual Contact) Unequal Stabilator Cable Tension Servicing Aids 20-3 20-3 21-1 21-2. Typical Stabilator Holding Fixture 21-2 21-3. PA-23-250 Trim Servo Cable Routing 21-5 21-4. PA-23-250 Dual Contact Type Trim Sensor 21-6 21-5. Dual Contact Type Trim Sensor 21-8 22-1. III Series Trim Servo Clutch Adjustment 22-2 22-2. Clutch Adjustment Detail . 22-3 22-3. PA-23-250 AltiMatic III B-1 22-4 23-1. Test Equipment 23-2 24-1. III Series Automatic Pitch Trim Servo Motor 24-1 24-2. III Series Automatic Electric Trim Schematic (Dual Contact Type Trim Sensor) AltiMatic III B-1 AutoPilots, PA-23-250 24-3 Revised: 6/3/75 xi PIPER PITCH TRIM SERVICE MANUAL LIST OF TABLES Table Page II-I. Simplified Block Diagram P. E. T. Series Electric Pitch Trim Systems. 2-6 II-II. Identifying Features P. E. T. Series Electric Pitch Trim Systems 2-7 III-I. III-II. Trim Servo Cable Tension Trim Sensor Cable Tension 3-21 3-21 VIII-I. Simplified Block Diagram III Series Automatic Electric Pitch Trim System 8-4 VIII-II. Identifying Features III Series Automatic Electric Pitch Trim System . 8-4 IX-I. Trim Servo Cable Tension 9-27 IX-II. Trim Sensor Cable Tension 9-27 X-I. III Series Trim Servo Clutch Tension 10-3 XIV-I. Simplified Block Diagram M. E. T. Series Electric Pitch Trim System 14-2 XIV-II. Identifying Features M. E. T. Series Electric Pitch Trim System 14-2 XV-I. Trim Servo Cable Tension 15-4 XVI-I. XVII-I. M. E. T. Series Trim Servo Clutch Tension Servo Continuity Test . 16-2 17-2 XXI-I. Trim Servo Cable Tension 21-5 XXI-II. Trim Sensor Cable Tension 21-5 XXII-I. III Series Trim Servo Clutch Tension 22-2 xii Issued: 8/25/72 PARTI P.E.T. (PIPER ELECTRIC TRIM) SYSTEMS Issued: 8/25/72 xiii PIPER PITCH TRIM SERVICE MANUAL SECTION I INTRODUCTION AND DESCRIPTION Paragraph 1-1. 1-2. Introduction . Description . Page 1-1 1-1 Issued: 8/25/72 i-i