What Happened
Regulatory Action Targets Piston Pin Failure in Certain Models
The Federal Aviation Administration (FAA) has issued an airworthiness directive for certain Lycoming Engines models, citing concerns over piston pin failure. The directive requires affected engines to undergo oil change and inspection for metal particulates, as well as replacement of affected piston pins within specified compliance times. This action is intended to prevent engine failure, loss of thrust control, and potential loss of control of the aircraft. The FAA’s decision was prompted by reports of metal particulates found in engine oil and two non-detectable engine failures. The directive applies to Lycoming Engines Model O-235, O-540, and IO-540 engines with a specific piston pin installed. This development was first reported by the Federal Aviation Administration.