Piper M600 — Maintenance Manual

This document is a proposed airworthiness directive (AD) issued by the FAA concerning the Piper PA-46-600TP airplanes, which includes the Piper M600 model. The directive addresses a safety issue related to the wing splice assembly, which has been found to potentially fail before reaching its established life limit. The FAA proposes to revise the Airworthiness Limitations section of the existing maintenance manual to reduce the life limit of the wing splice assembly from 5,132 hours to 3,767 hours time-in-service (TIS). This change is critical to ensure the safety and airworthiness of affected aircraft. The document outlines the compliance requirements for operators and the rationale behind the proposed changes, emphasizing the importance of addressing the identified unsafe condition to prevent loss of airplane control.

• The life limit for the wing splice assembly is reduced from 5,132 hours TIS to 3,767 hours TIS.
• Operators must revise their maintenance manuals within 90 days of the AD's effective date.
• The proposed AD affects 127 Piper PA-46-600TP airplanes in the U.S.
• Compliance cost is estimated at $85 per airplane.
• Failure of the wing splice assembly could lead to loss of airplane control.