Response to Inquiry: FAA Airworthiness Directive AD 2024-21-02 On October 31, 2024, at Lycoming Engines’ request, the FAA issued Airworthiness Directive (AD) 2024-21-02, which requires enhanced visual inspection during regularly scheduled oil changes to detect indications of deterioration of certain connecting rod bushings. The AD also directs follow-on maintenance activities to replace...

TEO-540-C1A Illustrated Parts Catalog Rev 6 DOCUMENT PART NO. PC-TEO-540-C1A REV 6 DATE RELEASED: January 2025 TITLE: TEO-540-C1A Illustrated Parts Catalog Rev 6 DOCUMENT PART NUMBER: PC-TEO-540-C1A Rev 6

Clean engine oil is essential to long engine life. Full-flow filter elements and full-flow spin-on assemblies are an added improvement over older methods of filtration and can be installed on any applicable engine not equipped with a filter. Installing an oil filter on an engine not equipped with a filter can increase the oil change interval from 25 to 50 hours.

Starter Inspection, Hartzell Engine Tech (HET) Service Bulletin (SB) No.211 DATE: January 8, 2025 MODELS AFFECTED: IO-360-A1A, -A1B, -A1B6, -A1B6D, -A1D6, -A2B, -A3B6, -A3B6D, -M1A, -M1B, -N1A, -P1A -LIO-360-M1A AEIO-360-A1A, -A1B, -A1B6, -A1D, -A1E, -A1E6, -A2C IO-390-A1A6, -A1B6, -A3A6, -A3B6 AEIO-390-A1A6, -A1B6, -A3A6, -A3B6 IO-540-V4A5, -V4A5D, -W1A5, -W1A5D, -W3A5D. TIME OF COMPLIANCE: Next...

DATE RELEASEED: November 2005 CURRENT REVISION: January 2013 TITLE: TIO-540 Series Angle Valve Cylinder Heads Operator's Manual DOCUMENT PART NUMBER: 60297-23A & 60297-23A-3 MODELS AFFECTED: TIO-540-A1A, -A1B, -A2A, -A2B, -A2C, -F2BD, -J2B, -J2BD, -N2BD, -R2AD, -S1AD, -U2A, -V2AD, -W2A, -AH1A and -AJ1A.

DATE RELEASEED: January 2007 CURRENT REVISION: September 2008 TITLE: O-235 and O-290 Series Operator’s Manual DOCUMENT PART NUMBER: 60297-9 & 60297-9-1 MODELS AFFECTED: O-235 series, O-290-D series, O-290-D2 series engines

DATE RELEASEED: June 2006 CURRENT REVISION: March 2009 TITLE: O-540, IO-540 Series Operator’s Manual DOCUMENT PART NUMBER: 60297-10 & 60297-10-3 MODELS AFFECTED: O-540 and IO-540 series

DATE RELEASEED: April 2007 CURRENT REVISION: September 2008 TITLE: O-320 76 Series Operator’s Manual DOCUMENT PART NUMBER: 60297-22 & 60297-22-1 MODELS AFFECTED: O-320