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.
Pratt & Whitney R-1340 Series Reciprocating Engines
Jul 19, 1999
Engine (R1340 SERIES)
AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.
Service Difficulty Reports (1)
Reports of failures and defects that operators and repair stations sent to the FAA since 1995. A report describes one finding; it is not an accident.
Reciprocating engine · piston · ring brokeMay 17, 1996
FIRST OR SECOND COMPRESSION RING BROKE CAUSING RING LANDS TO WEAR BETWEEN FIRST AND SECOND RING LAND AND THROUGH PISTON HEAD. COMBUSTION HEAT BURNED HOLE LARGER DIRECTING PRESSURE TO ENGINE CASE. THIS PRESSURE BLEW THE ENGINE OIL OVERBOARD. THIS RESULTED IN AN EMERGENCY LANDING.
From FAA Service Difficulty Reports; matched by N-number and serial number.