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.
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.
FOLLOWING ACCIDENT THAT RESULTED IN ENGINE FAILURE, INVESTIGATION FOUND NO COMPRESSION ON THE NR 1 CYL AND REPORTED VALVE CLEARANCE WAS 0.002 INCH. THE CYL WAS NOT REMOVED AND THE AC WAS RELEASED INTO CUSTODY. REMOVED THE NR 1 CYLINDER AND VALVES. BOTH VALVES HAD ACCELERATED WEAR TO THE VALVE…
From FAA Service Difficulty Reports; matched by N-number and serial number.