ATA 85 — Reciprocating Engine

20,859 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
654649	Cylinder Assembly	—	—	85	Engine Accessories	OEM
65464943BP	VALVE GUIDE	—	747-400 C182 Skylane+1	85	Engine Accessories	PMA
654649A3BP	VALVE GUIDE	—	747-400 C182 Skylane+1	85	Engine Accessories	PMA
654650	CYLINDER	—	747-400 767-200+4	85	unknown
65465044	CYLINDER	—	C182 Skylane	85	Hydraulics	PMA
654650A4	CYLINDER HEAD	—	747-400 767-200+4	85	unknown
654651	CYLINDER HEAD	CONT	C402	85	Engine Accessories	OEM
654651A2	CYLINDER ASSY	—	747-400 767-300+2	85	Hydraulics	PMA
654651A5	CYLINDER	—	747-400 767-200+4	85	unknown
654651A8	CYLINDER	—	747-400 767-300	85	Engine Accessories	OEM
654651A8STL	CYLINDER	—	747-400 767-200+3	85	unknown
65465242	CYLINDER	—	747-400 767-300+1	85	Hydraulics	PMA
654652A1	CYLINDER	—	747-400 767-300	85	Hydraulics	PMA
654654	ATTACH FITTING	CONT	737-300 C404 Titan+2	85	Structures	OEM
654684	tube assy-coolant	teledyne continental	—	85	Engine Accessories	OEM
654717P0051	PISTON RING	—	747-400 767-200+4	85	unknown
654717P010	piston ring	teledyne continental	—	85	Consumables / Hardware	OEM
654717P015	ring-piston	teledyne continental	—	85	Consumables / Hardware	OEM
654719	PISTON RING	—	—	85	Engine Accessories	PMA
654719CP	Ring, Compression	—	—	85	Engine Accessories	OEM
654719CP	Ring, Compression	—	—	85	Engine Accessories	OEM
654719P005	ring-piston 5.25 2	teledyne continental	—	85	Consumables / Hardware	OEM
654720	DRIVE GEAR	—	—	85	unknown	OEM
6547201	DRIVE SHAFT	—	747-400 PA-34 Seneca+1	85	unknown	OEM
654721	Piston 5.0 Dia., 8 1 comp. ratio	—	—	85	Engine Accessories	OEM
654721	Piston 5.0 Dia., 8 1 comp. ratio	—	—	85	Engine Accessories	OEM
654722	Piston 5.0 Dia., 8.6 1 comp. ratio	—	—	85	Engine Accessories	OEM
654722	Piston 5.0 Dia., 8.6 1 comp. ratio	—	—	85	Engine Accessories	OEM
654724	PISTON PIN	—	747-400 767-300ER+1	85	unknown	OEM
654724BP	PISTON	CONT	C421 Golden Eagle	85	Engine Accessories
654726	PISTON	CONT	SR22	85	Engine Accessories	OEM
654728BP-1P015	piston-balanced	teledyne continental	—	85	Engine Accessories	OEM
654729	Piston 5.0 Dia., 7.1 1 comp. ratio	—	—	85	Engine Accessories	OEM
654729	Piston 5.0 Dia., 7.1 1 comp. ratio	—	—	85	Engine Accessories	OEM
654729P015	piston	teledyne continental	—	85	Engine Accessories	OEM
654742-2-.50	sleeve-insulation	teledyne continental	—	85	Consumables / Hardware	OEM
654744	Piston 5.0 Dia., 7 1 comp. ratio	—	—	85	Engine Accessories	OEM
654744	Piston 5.0 Dia., 7 1 comp. ratio	—	—	85	Engine Accessories	OEM
654744P015BP	piston set	teledyne continental	—	85	Engine Accessories	OEM
654765	support casting	teledyne continental	—	85	Engine Accessories	OEM
654766	nut-coupling	teledyne continental	—	85	Consumables / Hardware	OEM
654811	BOLT	—	747-400 767-300	85	Consumables / Hardware	OEM
654829	Piston 5.0 Dia., 8 1 comp. ratio	—	—	85	Engine Accessories	OEM
654832	Piston 5.0 Dia., 8.6 1 comp. ratio	—	—	85	Engine Accessories	OEM
654832	Piston 5.0 Dia., 8.6 1 comp. ratio	—	—	85	Engine Accessories	OEM
654833	PISTON	CONT	C182 Skylane	85	Engine Accessories
654837	CAMSHAFT	—	—	85	Engine Accessories	OEM
654837A1	CAMSHAFT	—	747-400 767-200+4	85	Engine Accessories	OEM
654840	PISTON	CONT	C421 Golden Eagle	85	Engine Accessories	OEM
654840 P010654724 P010648033 P010646303 P010642761 P010	Piston	—	—	85	Engine Accessories	OEM