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
641782	Piston, 5.25 Dia.	—	—	85	Engine Accessories	OEM
641793	VALVE SEAT	—	C150	85	Interior / Furnishings	PMA
641793 P02	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P02	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P05	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P05	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P10	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P10	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P20	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P20	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P30	Seat, Intake	—	—	85	Engine Accessories	OEM
641793 P30	Seat, Intake	—	—	85	Engine Accessories	OEM
641793P002	Seat, Intake	—	—	85	Engine Accessories	OEM
641793P005	Seat, Intake	—	—	85	Engine Accessories	OEM
641793P010	Seat, Intake	—	—	85	Engine Accessories	OEM
641793P020	Seat, Intake	—	—	85	Engine Accessories	OEM
641793P030	Seat, Intake	—	—	85	Engine Accessories	OEM
641801R	OIL PUMP	—	C337 Skymaster	85	Engine Accessories	PMA
641893	Sheave, Access Driver HC-38 Belt	—	—	85	Engine Accessories	OEM
641909	LOCK PLATE	CONT	C421 Golden Eagle	85	Consumables / Hardware	OEM
641916	CYLINDER	—	C172 Skyhawk C150	85	Hydraulics	OEM
641916A1	CYLINDER	—	C172 Skyhawk	85	unknown	OEM
641916CP	ROCKER BOSS	—	C150	85	Engine Accessories	unknown
641917	CYLINDER HEAD	—	C150	85	Engine Accessories
641917A1	CYLINDER HEAD	CONT	—	85	Engine Accessories	OEM
641917A12	VALVE	—	C150	85	unknown
641930-10.52	Bolt, Thru 1/2-20 x 10.52	—	—	85	Consumables / Hardware	OEM
641930-10.52	Bolt, Thru 1/2-20 x 10.52	—	—	85	Consumables / Hardware	OEM
641930-10.95	Bolt, Thru, .50-20 x 10.95	—	—	85	Consumables / Hardware	OEM
641930-10.95	Bolt, Thru, .50-20 x 10.95	—	—	85	Consumables / Hardware	OEM
641930-5.50	Bolt, Thru, .50-20 x 5.50	—	—	85	Consumables / Hardware	OEM
641930-5.50	Bolt, Thru, .50-20 x 5.50	—	—	85	Consumables / Hardware	OEM
641930-6.75	Bolt, Thru, .50-20 x 6.75	—	—	85	Consumables / Hardware	OEM
641930-6.75	Bolt, Thru, .50-20 x 6.75	—	—	85	Consumables / Hardware	OEM
641930-9.81	Bolt, Thru, .50-20 x 9.81	—	—	85	Consumables / Hardware	OEM
641930-9.81	Bolt, Thru, .50-20 x 9.81	—	—	85	Consumables / Hardware	OEM
641931	BOLT	—	C182 Skylane C185 Skywagon+1	85	Consumables / Hardware	OEM
641931-10.52	Bolt, Thru 1/2-20 x 10.52	—	—	85	Consumables / Hardware	OEM
641931-10.52	Bolt, Thru 1/2-20 x 10.52	—	—	85	Consumables / Hardware	OEM
641931-10.94	Bolt, Thru, .50-20 x 10.94	—	—	85	Consumables / Hardware	OEM
641931-10.94	Bolt, Thru, .50-20 x 10.94	—	—	85	Consumables / Hardware	OEM
641931-10.95	Bolt, Thru, .50-20 x 10.95	—	—	85	Consumables / Hardware	OEM
641931-10.95	Bolt, Thru, .50-20 x 10.95	—	—	85	Consumables / Hardware	OEM
641931-5.50	Bolt, Thru, .50-20 x 5.50	—	—	85	Consumables / Hardware	OEM
641931-5.50	Bolt, Thru, .50-20 x 5.50	—	—	85	Consumables / Hardware	OEM
641931-6.75	Bolt, Thru, .50-20 x 6.75	—	—	85	Consumables / Hardware	OEM
641931-6.75	Bolt, Thru, .50-20 x 6.75	—	—	85	Consumables / Hardware	OEM
641931075	THROUGH BOLT	—	—	85	Consumables / Hardware	PMA
64193110	BOLT	—	C414	85	unknown	OEM
6419311075	THROUGH-BOLT	—	C206 Stationair C310+3	85	Consumables / Hardware