These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.
Engine (O-235-L2C)Serial numbers per Table 2 or Table 3 of Lycoming Mandatory Service Bulletin No. 667A, dated March 12, 2026. Only with: Installed piston pin P/N LW-13445 with an OEM FAA Form 8130-3 production dated between January 7, 2021 and December 15, 2025, or where the production date cannot be determined or the form is unavailable.
Airframe (152)Certain serial numbers: 150F 15061533–15064532; 150G 15064533–15064969; 150G 15064971–15067198; 150H 15067199–15069308; 150H 649; 150J 15069309–15071128; …. Only with: FA150L S/N FA1500121-FA1500261 and FA150M S/N FA1500262-FA1500336 only when equipped with FKA150-2311 and FKA150-2316.