Piper PA-31T Cheyenne — Wiring Diagram

The Piper Pitch Trim Service Manual provides comprehensive guidance for the installation, servicing, and maintenance of Electric Pitch Trim Systems used in various Piper aircraft, including the PA-31T Cheyenne. This manual is structured into four parts, each containing detailed sections that cover the theory of operation, removal and installation procedures, adjustment procedures, and schematics for troubleshooting. It is intended for use by technicians and maintenance personnel who are responsible for ensuring the proper functioning of the pitch trim systems. The manual emphasizes the importance of understanding the specific trim system installed in each aircraft to apply the correct service procedures effectively.

• The P. E. T. systems include manual and automatic modes for pitch trim operation.
• Proper cable tension is critical for the effective functioning of the trim sensor.
• The manual mode allows pilot control via a switch, while the automatic mode operates with the AutoPilot engaged.
• Adjustment procedures are essential for maintaining the trim systems' effectiveness and safety.
• Detailed schematics are provided for troubleshooting and understanding system layouts.