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
25C-7 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-9 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-9 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-9 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-9 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-9 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-9 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
260483	SHAFT	—	—	85	unknown	OEM
26064	TAPPET	—	PA-28 Cherokee	85	Engine Accessories	OEM
261280	CRANKSHAFT	—	—	85	unknown
2621-1	camshaft	teledyne continental	—	85	Engine Accessories	OEM
2621-1 or 2621-2	camshaft	teledyne continental	—	85	Engine Accessories	OEM
2628-1	washer 51 idx 25 thk	teledyne continental	—	85	Consumables / Hardware	OEM
2628-2	spacer crankcase thru bolt	teledyne continental	—	85	Consumables / Hardware	OEM
2628-3	washer 52 idx 16 thk	teledyne continental	—	85	Consumables / Hardware	OEM
2629-1	washer rocker thrust	teledyne continental	—	85	Consumables / Hardware	OEM
2630374	Enrichment Diaphragm	—	—	85	Engine Accessories	OEM
2630375	Enrichment Diaphragm Assembly	—	—	85	Engine Accessories	OEM
2630381	Diaphragm Assembly	—	—	85	Engine Accessories	OEM
2632-10	washer seal	teledyne continental	—	85	Consumables / Hardware	OEM
2632-25O	washer seal	teledyne continental	—	85	Consumables / Hardware	OEM
2632-8	washer seal	teledyne continental	—	85	Consumables / Hardware	OEM
2642713	Diaphragm Assy	VSE Aviation Services LLC	—	85	Engine Accessories	PMA
2642716	Seal Diaphragm	—	—	85	Engine Accessories	OEM
2642719	Diaphragm Assembly	—	—	85	Engine Accessories	OEM
2642722	Diaphragm	VSE Aviation Services LLC	—	85	Engine Accessories	PMA
2644993	Diaphragm	VSE Aviation Services LLC	—	85	Engine Accessories	PMA
266276	Spring	VSE Aviation Services LLC	—	85	Engine Accessories	PMA
2689770	Acceleration Pump Diaphragm	VSE Aviation Servicies LLC	—	85	Engine Accessories	PMA
2689771	Rear Diaphragm Assembly	VSE Aviation Servicies LLC	—	85	Engine Accessories	PMA
2689776	Enrichment Diaphragm	VSE Aviation Servicies LLC	—	85	Engine Accessories	PMA
2689777	Enrichment Diaphragm Assembly	VSE Aviation Servicies LLC	—	85	Engine Accessories	PMA
269A54023	NUT	—	—	85	Consumables / Hardware	PMA
270020	BEARING	—	C210 Centurion	85	unknown
270451	Crankshaft	—	—	85	Engine Accessories	OEM
270458	CRANKSHAFT	—	—	85	unknown	OEM
27056	PISTON	—	—	85	unknown	OEM
27056CA1	PISTON	—	—	85	Hydraulics	PMA
27056CAI	PISTON	—	—	85	unknown	OEM
27057	Ring, Piston Compression	—	—	85	Engine Accessories	OEM
270675R	CRANKCASE	—	—	85	Engine Accessories	PMA
272225	BOLT	—	—	85	unknown	OEM
272230	REARCASE	—	—	85	unknown
276157R	SLEEVE	—	C404 Titan	85	unknown
276338R	FILTER	—	C404 Titan	85	unknown
276347R	CRANKCASE	—	C404 Titan	85	Engine Accessories	PMA
276439R	CRANKCASE	—	C404 Titan	85	Engine Accessories	OEM
2765-1	Retainer - Rocker Shaft .	Ram Aircraft Limited Partnership	—	85	Engine Accessories	PMA
280127R	CRANKCASE	—	C210 Centurion	85	Engine Accessories	PMA
28126441	CYLINDER	—	—	85	unknown	OEM