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Wed, Jun 14, 2017

AD: Lycoming Engines Reciprocating Engines

AD NUMBER: 2017-11-10

PRODUCT: All Lycoming TIO-540-AJ1A reciprocating engines.

ACTION: Final Rule; request for comments

SUMMARY: This AD requires initial and repetitive inspections of engine exhaust system weld joints and torque checking the exhaust pipe flange mounting nuts.

The FAA received several reports of cracked engine exhaust pipes and exhaust studs pulling out from
cylinders on Lycoming TIO-540-AJ1A reciprocating engines.

This AD requires initial and repetitive inspections of all engine exhaust system weld joints and torque checking the exhaust pipe flange mounting nuts.

The FAA is issuing this AD to prevent engine exhaust leaks, which could lead to uncontrolled engine fire, harmful exhaust gases entering the cabin resulting in crew incapacitation, and damage to the airplane.

The FAA estimates that this AD affects 758 engines, installed on airplanes of U.S. registry.

DATES: This AD is effective June 28, 2017. Comments must be received by July 28, 2017.

FMI: AD

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