ATA 72 — Engine - Turbine / Turboprop

37,874 parts classified under this chapter

Reliability rollup

100%Median scrap propensity

5,464 parts · 14,008 SDR reports

From FAA Service Difficulty Reports

Life-limited parts — how engine material is really valued

Engine rotating structure — fan, compressor and turbine disks, spools, hubs and shafts— is life-limited: each part number carries a hard cycle limit published in the engine's Airworthiness Limitations Section. Unlike blades, vanes and seals, which are on-condition and repairable, an LLP is retired at its limit regardless of condition.

That makes cycles remaining, not condition, the value of a used LLP — and makes complete back-to-birth trace records the difference between a saleable disk and scrap. It is why engine teardowns are underwritten on the LLP stack rather than on parts count.

What we do not have:we carry no per-part-number cycle limits and no remaining-life data. Those live in OEM Airworthiness Limitations Sections and in each unit's own trace file — neither is public, and neither can be inferred from registry, SDR or PMA data. Our life-limit tagging covers date- and shelf-controlled classes (oxygen, fire bottles, slides and rafts, batteries, pyrotechnics, tires, de-ice boots, fuel bladders, pressure vessels), not engine LLPs. Always price an LLP off its trace records.

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
31033336	BEARING	GARRTT	Jetstream 31 C208B Grand Caravan	72	Consumables / Hardware	unknown
310333501	ADAPTER	—	—	72	unknown	OEM
3103336	BEARING	—	—	72	unknown	OEM
31033541	IDLER GEAR	—	—	72	Engine Accessories	OEM
3103380	ENGINE	—	Jetstream 31	72	Engine Accessories
310338024	ENGINE	—	Jetstream 31	72	Engine Accessories	PMA
310338025	ENGINE	GARRTT	Jetstream 31	72	Engine Accessories
310338026	ENGINE	—	Jetstream 31	72	Engine Accessories
3103435	GEAR	—	—	72	unknown	OEM
310344601	CARBON SEAL	—	ATR 42-300 Embraer EMB-120 Brasilia+1	72	Engine Accessories
310349011	OIL SYSTEM	—	Jetstream 41	72	Engine Accessories	PMA
310349014	ENGINE	—	Jetstream 41	72	Engine Accessories	PMA
310349015	FUEL NOZZLES	GARRTT	Jetstream 41	72	Fuel Systems	OEM
310349016	ENGINE	GARRTT	Jetstream 41	72	Engine Accessories	OEM
31034905	ENGINE	—	Jetstream 41	72	Engine Accessories	OEM
3103551-1	blade	other	—	72	Engine Accessories	OEM
31035781	TUBE	—	—	72	unknown
3103580	HOUSING	—	—	72	unknown	OEM
3103581	NOZZLE	—	—	72	unknown	OEM
31035811	OIL JET	GARRETTLTD	—	72	Engine Accessories	OEM
31035851	BEARING RACE	—	Jetstream 31 Dornier 228	72	unknown	OEM
3103585AL-1	Bearing, Ball	Extex Engineered Products Inc	—	72	Engine Accessories	PMA
31035891	SPUR GEAR	—	—	72	unknown	OEM
3103590-2WE	Gear-Spur	Wencor, LLC	—	72	Engine Accessories	PMA
31035902	NONE	Honeywell	—	72	unknown	OEM
31035992	IDLER DRIVE ASSY	—	Jetstream 31	72	Engine Accessories	OEM
31036016	GEAR ASSY	—	—	72	Engine Accessories	OEM
31036471	LINE	—	Jetstream 31	72	unknown	OEM
310370101	BLADE	—	King Air 90	72	Engine Accessories	PMA
31037081	BEARING	—	Jetstream 31	72	unknown	OEM
31037131	NUT	—	—	72	Consumables / Hardware	PMA
31037503	SEAL	—	Jetstream 31	72	Consumables / Hardware	PMA
31037505	GASKET	—	—	72	Consumables / Hardware	OEM
31037511	GASKET	GARRTT	—	72	Consumables / Hardware
31037839	TURBINE NOZZLE	—	—	72	unknown	OEM
3103783931038971	BLADE	—	—	72	unknown	OEM
31038381	ROTOR	—	Jetstream 31	72	unknown	OEM
3103839	SEAL	—	—	72	Consumables / Hardware
31038391	ROTATING SEAL	—	—	72	Engine Accessories
31038393	ROTATING SEAL	—	—	72	unknown	OEM
3103857-1	Ring Seal	—	—	72	Engine Accessories	OEM
3103857-1	Ring Seal	—	—	72	Engine Accessories	OEM
3103857-1WE	Ring Seal	Wencor, LLC	—	72	Engine Accessories	PMA
31038707	GEARBOX	—	—	72	Engine Accessories	PMA
3103893	SEAL	—	—	72	Consumables / Hardware
31038939	SEAL PLATE	—	—	72	Structures	PMA
31039252	TURBINE BLADES	HNYWL	—	72	Engine Accessories	OEM
31039401	SUPPORT	—	—	72	unknown
3103971	CHIP DETECTOR	—	Jetstream 41	72	unknown
31039772	IDLER GEAR	Honeywell	—	72	Engine Accessories	OEM