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
639053	Cylinder Assy.	—	—	85	Engine Accessories	OEM
639134	CRANKSHAFT	CONT	C206 Stationair	85	Engine Accessories	OEM
639193	BUSHING	—	C402	85	unknown
639195	COUNTERWEIGHT	—	—	85	Flight Controls	PMA
639196	COUNTERWEIGHT	—	C206 Stationair	85	unknown	OEM
639200	CRANKSHAFT	—	—	85	Engine Accessories
639222	CYLINDER	—	C206 Stationair	85	unknown
639243	CRANKSHAFT	—	—	85	Engine Accessories	OEM
639272	ROCKER BOSS	—	C185 Skywagon C210 Centurion	85	unknown	OEM
639272A1	CYLINDER	—	C206 Stationair	85	Hydraulics	OEM
639272CP	CYLINDER	—	—	85	Hydraulics	OEM
639272E	CYLINDER	—	—	85	Hydraulics	PMA
639272P1O	CYLINDER	—	—	85	Engine Accessories	OEM
639274	CYLINDER	—	C210 Centurion	85	unknown
639282	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P05	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P05	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P10	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P10	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P15	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P15	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P20	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P20	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P30	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282 P30	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282P005	guide-valve exhaust	teledyne continental	—	85	Engine Accessories	OEM
639282P010	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282P015	Guide, Exhaust Valve	—	—	85	Engine Accessories	OEM
639282P030	guide-valve	teledyne continental	—	85	Engine Accessories	OEM
639292	COTTER PIN	—	PA-34 Seneca M20K	85	Consumables / Hardware	OEM
639323	INTAKE TUBE	—	C404 Titan	85	Engine Accessories	OEM
639388	SCAVENGE PUMP	—	C340 Saab 340	85	Engine Accessories	PMA
639406	SHAFT	—	C402	85	Engine Accessories	OEM
639468	CRANKCASE	—	C421 Golden Eagle	85	unknown	OEM
639562	Ring, Compression	—	—	85	Engine Accessories	OEM
639562	Ring, Compression	—	—	85	Engine Accessories	OEM
639563	Ring, Compression	—	—	85	Engine Accessories	OEM
639563	Ring, Compression	—	—	85	Engine Accessories	OEM
639566 & 649010	Piston Ring Top Groove	—	—	85	Engine Accessories	OEM
639566 & 649010	Piston Ring Top Groove	—	—	85	Engine Accessories	OEM
639566 P15 & 649010 P15	Piston Ring Top Groove	—	—	85	Engine Accessories	OEM
639566 P15 & 649010 P15	Piston Ring Top Groove	—	—	85	Engine Accessories	OEM
639566 P5 & 649010 P5	Piston Ring Top Groove	—	—	85	Engine Accessories	OEM
639566 P5 & 649010 P5	Piston Ring Top Groove	—	—	85	Engine Accessories	OEM
639566P005 & 649010P005	Piston Ring Top Groove	—	—	85	Engine Accessories	OEM
639566P015 & 649010P015	Piston Ring Top Groove	—	—	85	Engine Accessories	OEM
639567	Ring, Compression	—	—	85	Engine Accessories	OEM
639567	Ring, Compression	—	—	85	Engine Accessories	OEM
639567 & 639568	Piston Ring, Oil Control	—	—	85	Engine Accessories	OEM