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
3031060CL20	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL20CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL22	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL22CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL24	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL24CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL26	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL26CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL28	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL28CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL30	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL30CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL32	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL32CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL34	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL34CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL36	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL36CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031060CL6	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL8	Shroud Segment	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031060CL8CP	Shroud Segment, Compressor Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031097	Rivet, Tubular, Countersunk	—	—	72	Engine Accessories	OEM
3031097CP	Rivet, Tubular, Countersunk	Core Parts LLC	—	72	Engine Accessories	PMA
3031098	RIVET	—	—	72	unknown	OEM
3031134-001	Blocking Valve Subassembly	—	757-200 767-200+11	72	Engine Accessories	OEM
3031134-001	Blocking Valve Subassembly	—	757-200 767-200+11	72	Engine Accessories	OEM
3031134JP-001	Blocking Valve Subassembly	Jet Parts Engineering Inc	757-200 767-200+11	72	Engine Accessories	PMA
3031137CP	Plate, Retaining, High Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031200	ENGINE	—	—	72	unknown	OEM
3031233	Seal	ONTIC Engineering & Manufacturing Inc	—	72	Engine Accessories	PMA
3031300	ENGINE	—	—	72	Engine Accessories	OEM
3031377	Seal Assembly, Air, Power Turbine Stator	—	—	72	Engine Accessories	OEM
3031377CP	Seal Assembly, Air, Power Turbine Stator	Core Parts LLC	—	72	Engine Accessories	PMA
3031416	VENT LINE	—	ATR 42	72	unknown	OEM
3031660CL1	Weight, Turbine, Balance	—	—	72	Engine Accessories	OEM
3031660CL1AA	Weight, Turbine, Balance	Aero Attitude, LLC	—	72	Engine Accessories	PMA
3031660CL1CP	Weight, Balance, Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031660CL2	Weight, Turbine, Balance	—	—	72	Engine Accessories	OEM
3031660CL2AA	Weight, Turbine, Balance	Aero Attitude, LLC	—	72	Engine Accessories	PMA
3031660CL2CP	Weight, Balance, Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031660CL3	Weight, Turbine, Balance	—	—	72	Engine Accessories	OEM
3031660CL3AA	Weight, Turbine, Balance	Aero Attitude, LLC	—	72	Engine Accessories	PMA
3031660CL3CP	Weight, Balance, Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031660CL4	Weight, Turbine, Balance	—	—	72	Engine Accessories	OEM
3031660CL4AA	Weight, Turbine, Balance	Aero Attitude, LLC	—	72	Engine Accessories	PMA
3031660CL4CP	Weight, Balance, Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031660CL5	Weight, Turbine, Balance	—	—	72	Engine Accessories	OEM
3031660CL5AA	Weight, Turbine, Balance	Aero Attitude, LLC	—	72	Engine Accessories	PMA
3031660CL5CP	Weight, Balance, Turbine	Core Parts LLC	—	72	Engine Accessories	PMA
3031670CL10	Shroud Segment, Compressor Turbine	—	—	72	Engine Accessories	OEM