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
31C-38-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-38-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-38-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-39-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-39-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-39-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-40-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-40-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-40-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-41-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-41-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-41-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-42-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-42-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-42-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-43-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-43-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-43-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-44	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-44	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-44-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-44-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-44-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-45	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-45	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-45-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-45-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-45-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-46	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-46	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-46-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-46-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-46-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-47	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-47	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-47-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-47-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-47-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-48	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-48	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-48-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-48-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-48-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-49	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-49	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-49-P03	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-49-P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-49-P12	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-5 P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM
31C-5 P07	Stud, 5/16 IN DIA, Coarse Thread	—	—	85	Engine Accessories	OEM