FAA: Special Airworthiness Information Bulletin on All Lycoming Engines (Lycoming) Direct-drive Reciprocating Engines,

This Special Airworthiness Information Bulletin alerts you, owners, operators, and certificated repair facilities that, all Lycoming Engines (Lycoming) direct-drive reciprocating engines, including VO-360 and IVO-360; except O-320-H, O-360-E, LO-360-E, TO-360-E, LTO-360-E, and TIO-541 series engines, must be in compliance with Airworthiness Directive (AD) 2004-10-14 if they have had a propeller strike. The local FAA Flight Standards District Office (FSDO) may issue a Special Flight Permit (SFP) even though compliance with the AD is, “before further flight”. In addition to the AD requirement, Lycoming requires engine disassembly and inspection.


We recommend that in the event of a propeller strike, as defined in AD 2004-10-14, you comply with both AD 2004-10-14 (replacement of the crankshaft gear bolt and installation in accordance with Lycoming MSB 475C) and Lycoming MSB 533A (disassembly and inspection of the rotating parts).

For more information rgl.faa.gov/Regulatory_and_Guidance_Library/rgSAIB.nsf/0/83b747e976557948862574c000622abd/$FILE/NE-06-32R1.pdf