Piper PA-31T Cheyenne II — Service Bulletins

This Service Bulletin No. 836A from Piper Aircraft Corporation addresses mandatory compliance for various aircraft models, including the Piper PA-31T Cheyenne II. Issued on August 26, 1986, it supersedes the previous bulletin dated May 21, 1986. The bulletin outlines the need for inspection and potential replacement of aluminum wire with copper wire in specific electrical connections to prevent overheating and potential electrical fires. The document provides detailed instructions for identifying affected cables and the necessary materials for compliance. It emphasizes the importance of addressing corrosion issues that can arise between aluminum terminals and wires, which can lead to high electrical resistance and overheating.

• Compliance with Service Bulletin No. 836A is mandatory for the PA-31T Cheyenne II.
• Inspect and replace aluminum wire in specified electrical connections to prevent overheating.
• Compliance must occur at the next scheduled inspection or within 50 hours of operation.
• Use AN-4 or AN-2 copper wire for replacements, as specified in the bulletin.
• Proper crimping tools must be used for all connections to ensure safety.