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
24878	BOLTS	—	C414	85	Consumables / Hardware
249922	Valve Seats	—	—	85	Engine Accessories	OEM
250000CC (and oversizes up to .020)	Ring, Compression	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
250000CC and oversizes up to .020	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
250001 250001CC 250001NI and oversizes up to .020	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
250001-04	Rotomaster Actuator	Machen, Inc.	—	85	Engine Accessories	PMA
250001, 250001CC, 250001NI (and oversizes up to .020)	Ring, Compression	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
250002-003, -005, & -006	Rotomaster Controller	Machen, Inc.	—	85	Engine Accessories	PMA
250004-0000	piston	kelly aero power	—	85	Engine Accessories	OEM
250015	Valve Seats	—	—	85	Engine Accessories	OEM
250033-0000	ring glyd	kelly aero power	—	85	Engine Accessories	OEM
25015	STUD	—	PA-31 Navajo	85	Consumables / Hardware	PMA
250224	Valve Seats	—	—	85	Engine Accessories	OEM
250559-3	Bushing	Machen, Inc.	—	85	Consumables / Hardware	PMA
25102	GARLOCK SEAL	CONT	C402	85	Consumables / Hardware
25117	PLUG	—	—	85	unknown
251822 (and oversizes up to .020)	Ring, Compression	Airmotive Engineering Corp	AN-2	85	Engine Accessories	PMA
251822 Drawing 251822 Rev. D or later FAA approved revision.	Compression Ring 8 degree Keystone Taper Faced.	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
251824 (and oversizes up to .010)	Ring, Oil Control	Airmotive Engineering Corp	AN-2	85	Engine Accessories	PMA
251824 Drawing 251824 Rev. D or later FAA approved revision.	Dual Oil Control Ring	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
251825 (and oversizes up to .010)	Ring, Scraper	Airmotive Engineering Corp	AN-2	85	Engine Accessories	PMA
251825 Drawing 251825 Rev. C or later FAA Approved revision.	Scraper Ring	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
2520686	Valve	VSE Aviation Services LLC	AN-2	85	Engine Accessories	PMA
2520819-F	diaphragm washer	other	—	85	Engine Accessories	OEM
2520875-2-F	shoulder headless pin	other	—	85	Consumables / Hardware	OEM
2521754-2-F	shoulder headless pin	other	—	85	Consumables / Hardware	OEM
2522022-F	pin	other	—	85	Consumables / Hardware	OEM
2524643	Carburetor Assembly, Type PS&7BD,	Honeywell	—	85	Fuel Systems	PMA
252501 252501CC 252501NI	ring compression	teledyne continental	—	85	Engine Accessories	OEM
252501, 252501CC, 252501NI	Ring, Compression	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
252501FCC	PISTON RING	—	—	85	Engine Accessories	PMA
252509 252509CC and oversizes up to .015	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
252509, 252509CC (and oversizes up to .015)	Ring, Compression	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
252510	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
252511 252511CC 252511NI	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
252511, 252511CC, 252511NI	Ring, Compression	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
252512	ring compression	teledyne continental	—	85	Engine Accessories	OEM
252514	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
252515	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
252519CC (and oversizes up to .015)	Ring, Scraper	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
252519CC and oversizes up to .015	ring scraper	teledyne continental	—	85	Consumables / Hardware	OEM
252531CC 252531ST	ring assembly oil control	teledyne continental	—	85	Consumables / Hardware	OEM
252531CC, 252531ST	Ring Assy., Oil Control	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
252532CC, 252532ST, 252532WCC, 252532WST (and oversizes up to .015)	Ring Assy, Oil Control	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
252540 252540CC 252540NI	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
252540, 252540CC, 252540NI	Ring, Compression	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
252541 (and oversizes up to .020)	Ring, Compression	Airmotive Engineering Corp	—	85	Engine Accessories	PMA
252541 and oversizes up to .020	ring compression	teledyne continental	—	85	Consumables / Hardware	OEM
252542-T	ring assembly oil	teledyne continental	—	85	Consumables / Hardware	OEM
252542CC 252542ST and oversizes up to .015	ring assembly oil control	teledyne continental	—	85	Engine Accessories	OEM