Piper PA-22 Colt — Checklist

This document is a service letter from Piper Aircraft, Inc., dated December 1, 2022, addressing the replacement of the locking gascolator drain valve for specific Piper aircraft models, including the PA-22-108 Colt. The letter outlines the potential risks associated with the locking drain valve, which could be inadvertently left open, leading to fuel starvation and engine failure. The service letter provides detailed instructions for replacing the locking drain valve with a non-locking variant, ensuring compliance with safety standards. It is intended for aircraft owners and operators to facilitate necessary maintenance and enhance operational safety.

• The service letter addresses the replacement of the locking gascolator drain valve for the PA-22-108 Colt.
• Owners/operators are advised to replace the locking valve at their discretion to prevent fuel starvation.
• Step-by-step instructions are provided for the replacement process, including safety precautions.
• A non-locking drain valve (P/N 492-312) is required for the replacement.
• Documentation of compliance with this service letter is necessary in the aircraft's logbook.