ATA 85 — Reciprocating Engine

19,883 parts classified under this chapter

Reliability rollup

91%Median scrap propensity

2,637 parts · 5,796 SDR reports

From FAA Service Difficulty Reports

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
74563	Cylinder Assembly	—	—	85	Engine Accessories	OEM
74595	RELIEF VALVE	LYC	—	85	Engine Accessories	OEM
74636	ROCKER	—	C172 Skyhawk	85	unknown	OEM
74637	BUSHING	—	—	85	unknown	OEM
74644	ROD BOLT	—	—	85	Consumables / Hardware	PMA
74648	CRANKSHAFT	—	C172 Skyhawk	85	unknown
74667	CONNECT ROD	—	—	85	Engine Accessories	OEM
74709	CRANKSHAFT	—	—	85	unknown
74801M10	BEARING	—	—	85	unknown
74802	Valve, Exhaust (Rotor Type)	—	—	85	Engine Accessories	OEM
74887	Spacer	—	—	85	Consumables / Hardware	OEM
74924	Cylinder Assembly	—	—	85	Engine Accessories	OEM
74924	Cylinder Assembly	—	—	85	Engine Accessories	OEM
74925	CYLINDER	—	PA-23 Apache	85	Engine Accessories	PMA
74943	CRANKCASE	—	—	85	Engine Accessories	OEM
74965	CRANKSHAFT	—	—	85	unknown	OEM
74968	CRANKSHAFT	—	—	85	unknown	OEM
74970	CRANKSHAFT	—	—	85	Engine Accessories
74973	Cylinder Assembly	—	—	85	Engine Accessories	OEM
74989	Ring, Piston Compression	—	—	85	Engine Accessories	OEM
74989	Ring, Piston Compression	—	—	85	Engine Accessories	OEM
74989 P10	Ring, Piston Compression	—	—	85	Engine Accessories	OEM
74989 P10	Ring, Piston Compression	—	—	85	Engine Accessories	OEM
74989 P20	Ring, Piston Compression	—	—	85	Engine Accessories	OEM
74989 P20	Ring, Piston Compression	—	—	85	Engine Accessories	OEM
74996	IDLER GEAR	—	C172 Skyhawk C152	85	Engine Accessories	OEM
75006	CRANKSHAFT	—	PA-28 Cherokee	85	Engine Accessories	PMA
75010	CRANKSHAFT	—	PA-28 Cherokee PA-28-140	85	unknown
75011	CRANKSHAFT	—	—	85	Engine Accessories	OEM
75038	CRANKSHAFT	—	PA-32 Saratoga PA-23 Apache+1	85	Engine Accessories
75040	CRANKSHAFT	—	—	85	unknown	OEM
75042	Cylinder Assembly	—	—	85	Engine Accessories	OEM
75042	Cylinder Assembly	—	—	85	Engine Accessories	OEM
75044	Cylinder Stud and Valve Assy.	—	—	85	Engine Accessories	OEM
75044	Cylinder Stud and Valve Assy.	—	—	85	Engine Accessories	OEM
75060	CONNECT ROD	—	PA-32 Saratoga PA-34 Seneca+2	85	Engine Accessories	OEM
75061	BOLT	—	M20C	85	Consumables / Hardware	OEM
75068	EXHAUST VALVE	LYC	C172 Skyhawk C150+1	85	Engine Accessories	OEM
75072	IDLER GEAR	—	C152 M20C	85	unknown	OEM
75077	CRANKSHAFT	—	MD 500	85	unknown	OEM
75089	PISTON	LYC	C172 Skyhawk	85	Engine Accessories	OEM
75089 P10	Piston	—	—	85	Engine Accessories	OEM
75089 P20	Piston	—	—	85	Engine Accessories	OEM
75089LW11775	PISTON	—	PA-44 Seminole	85	unknown	OEM
7510	COVER PLATE	—	M20F	85	Structures	PMA
75141	SUMP	—	PA-28 Cherokee	85	unknown	OEM
75152	Stabilizer, Fin	—	—	85	Engine Accessories	OEM
75154	STUD	—	PA-28 Cherokee	85	Consumables / Hardware	OEM
75154 P03	Stud	—	—	85	Consumables / Hardware	OEM
75154 P07	Stud	—	—	85	Consumables / Hardware	OEM