Piper AltiMatic IIIC Autopilot Service Manual 761-602 (1974-1981) PDF

Description

Piper AltiMatic IIIC Autopilot Service Manual 761-602 (1974–1981) PDF

File Details

• Manual Type: Official Piper Aircraft Service Manual
• Document Number: 761-602
• Language: English
• Page Count: 239 Pages
• File Format: Scanned PDF
• Revision Dates: 1975, 1977, 1978, 1979, 1981

Chapters Covered

This comprehensive service manual is your complete guide to the Piper AltiMatic IIIC autopilot system, covering three main parts:

Part I: AltiMatic IIIC

• Section I: Introduction and Description
• Section II: Theory of Operation (Console, Amplifier, Gyros, HSI, Modes)
• Section III: Removal and Installation (All components by aircraft model)
• Section IV: Test Equipment (66D141 Test Kit)
• Section V: Set-Up Procedures (Bench, Ground, and Flight Adjustments)
• Section VI: Wiring Diagrams (System harnesses and block diagrams)

Part II: Glide Slope Coupler

• Section VII: Description
• Section VIII: Theory of Operation
• Section IX: Removal and Installation
• Section X: Test Equipment
• Section XI: Bench Set-Up Procedures
• Section XII: Ground Check and Flight Set-Up Procedures

Part III: Electronic Pitch Trim

• Section XIII: Introduction and Description
• Section XIV: Theory of Operation
• Section XV: Ground Check – Electronic Pitch Trim System
• Section XVI: Troubleshooting

This manual also includes detailed wiring diagrams, schematic diagrams (servo, relay box, altitude hold unit, electronic trim system), and multiple setup and adjustment procedures for the autopilot amplifier and trim system.

Whether you are an A&P mechanic, an avionics technician, or a dedicated owner-operator, this official Piper service manual provides the detailed procedures needed to maintain, troubleshoot, and repair the AltiMatic IIIC autopilot system. It covers everything from servo cable tension adjustments and console set-up to full system bench checks and flight tuning for specific Piper aircraft models including the PA-23, PA-31, PA-32, PA-34, and PA-44.

Key Capabilities & Repairs Supported:

• Complete system troubleshooting using the 66D141 test kit and isolation block diagrams.
• Step-by-step removal and installation of the console, amplifier, gyros, servos, and trim units for multiple aircraft models.
• Bench set-up, threshold adjustments, and ground checks for the autopilot and radio coupler.
• In-flight adjustment procedures for roll, pitch, heading, and altitude hold modes.
• Detailed set-up and alignment of the slaved horizontal situation indicator (HSI) and flux detector.
• Servicing and adjustment of the yaw damper system and electronic pitch trim.
• Full wiring diagrams, harness schematics, and connector pinouts.

This is the exact factory-authorized information required to correctly diagnose and repair the Piper AltiMatic IIIC autopilot. Having the correct specifications, torque values, and test procedures is essential for safe and reliable flight control system operation.

Instant PDF Delivery: This is a digital download. No physical product will be shipped. You will receive the complete PDF immediately after purchase, viewable on any device—computer, tablet, or smartphone. Print the entire manual or select pages for use in your hangar or workshop.