Piper PA-31T Cheyenne II — Weight And Balance

This service bulletin, SB7034, addresses the emergency extension air line for the Piper PA-31T Cheyenne II and PA-31T2 Cheyenne II XL models. It provides mandatory instructions for inspecting and potentially rerouting the emergency gear extension air line to prevent chafing against the brake cylinder. The bulletin is applicable to specific serial numbers and outlines the necessary compliance actions to enhance the reliability of the landing gear system. The document is FAA approved and emphasizes the importance of performing the outlined procedures within 25 hours of receipt.

• Mandatory compliance within 25 hours of receipt.
• Applies to specific serial numbers: 31T-8166001 to 31T-8166062.
• Inspect and potentially reroute the emergency gear extension air line to prevent chafing.
• Follow detailed accomplishment instructions for proper installation.
• Materials required include specific part numbers for components.