Textron Lycoming Issues Airworthiness Directive for AEIO-540, IO-540, LTIO-540, O-540, and TIO-540 Series Engines

Summary

The Federal Aviation Administration (FAA) has issued an airworthiness directive (AD) requiring the replacement of zinc-plated crankshaft gear retaining bolts in Textron Lycoming AEIO-540, IO-540, LTIO-540, O-540, and TIO-540 series reciprocating engines to prevent loss of engine power and potential forced landings.