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
66-10023-( )	Top Engine Modification	Machen, Inc.	—	85	Engine Accessories	PMA
66-10027-1	Baffle	Machen, Inc.	—	85	Structures	PMA
66-10037-( )	Turbo Air Inlet Duct	Machen, Inc.	—	85	Engine Accessories	PMA
66-10038-( )	Turbo Inlet Diffuser	Machen, Inc.	—	85	Engine Accessories	PMA
66-10040-( )	Diverter Valve	Machen, Inc.	—	85	Engine Accessories	PMA
66-10041-( )	Controller and Wastegate Valve Modifications	Machen, Inc.	—	85	Engine Accessories	PMA
66-10042-( )	Induction Tubing Coupling Flanges	Machen, Inc.	—	85	Engine Accessories	PMA
66-10044-( )	Induction Tubing - Right Engine	Machen, Inc.	—	85	Engine Accessories	PMA
66-10045-( )	Induction Tubing - Left Engine	Machen, Inc.	—	85	Engine Accessories	PMA
66-10046-( )	T18A95 Turbocharger Modification (Optional)	Machen, Inc.	—	85	Engine Accessories	PMA
66-10052-( )	Engine Baffles - Right Front	Machen, Inc.	—	85	Structures	PMA
66-40001-( )	Intercooler Ducting Details and Assemblies	Machen, Inc.	—	85	Engine Accessories	PMA
66-40005-( )	Intercooler Brackets	Machen, Inc.	—	85	Engine Accessories	PMA
662200	PISTON	—	C150	85	Engine Accessories	OEM
66610	BUSHING	—	C172S	85	unknown	OEM
66670	Bushing, Rocker Shaft	—	—	85	Engine Accessories	OEM
66713	GUIDE	LYC	R44	85	unknown
66713 P05	Guide, Intake Valve	—	—	85	Engine Accessories	OEM
66713 P10	Guide, Intake Valve	—	—	85	Engine Accessories	OEM
66713 P20	Guide, Intake Valve	—	—	85	Engine Accessories	OEM
66713 P30	Guide, Intake Valve	—	—	85	Engine Accessories	OEM
66713 P40	Guide, Intake valve	—	—	85	Engine Accessories	OEM
66721	Insert, Valve Seat, Exhaust	—	—	85	Engine Accessories	OEM
66721	Insert, Valve Seat, Exhaust	—	—	85	Engine Accessories	OEM
66732	GASKET	LYC	PA-31 Navajo	85	Engine Accessories	OEM
66734	STUD	—	MD 500	85	Consumables / Hardware	PMA
67113	ROCKER	LYC	PA-31 Navajo	85	Engine Accessories	OEM
67193	Valve Cover Gasket	Real Gasket TN	—	85	Engine Accessories	PMA
67204	LOCKWASHER	—	—	85	Consumables / Hardware	OEM
6741917A11	CYLINDER HEAD	CONT	—	85	Engine Accessories	OEM
67514	GEAR	—	PA-32 Saratoga PA-31 Navajo+1	85	unknown	OEM
67583	GEAR	—	—	85	unknown	OEM
67610	STARTER GEAR	—	Bell 47	85	Engine Accessories	PMA
6764-11	Ring, Guide	—	A330-200 A330-300	85	Engine Accessories	OEM
6764-11	Ring, Guide	—	A330-200 A330-300	85	Engine Accessories	OEM
676405	CRANKCASE	—	—	85	Engine Accessories	PMA
67687	GEAR	—	—	85	unknown
67835	Insert, Valve Seat, Exhaust	—	—	85	Engine Accessories	OEM
67835	Insert, Valve Seat, Exhaust	—	—	85	Engine Accessories	OEM
679	BOLT	—	—	85	Consumables / Hardware	PMA
68-10004-( )	Turbo Mount	Machen, Inc.	—	85	Structures	PMA
68-10006-( )	Turbo Transition	Machen, Inc.	—	85	Engine Accessories	PMA
68-10007-( )	Controller Manifold	Machen, Inc.	—	85	Engine Accessories	PMA
68-10009-( )	Intake Manifold	Machen, Inc.	—	85	Engine Accessories	PMA
68-10014-( )	Air Filter Box	Machen, Inc.	—	85	Engine Accessories	PMA
68-10031-( )	Left Front Engine Baffling	Machen, Inc.	—	85	Structures	PMA
68-10036-( )	Intercylinder Engine Baffling	Machen, Inc.	—	85	Structures	PMA
680-AA	Gasket-Bolt Crankpin Oil Seal	—	—	85	Engine Accessories	OEM
680-AA	Gasket-Bolt Crankpin Oil Seal	—	—	85	Engine Accessories	OEM
6816047CM	Gasket	Jet Avion Corporation A HEICO Aerospace Company	—	85	Engine Accessories	PMA