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
25C-28 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-28 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-28 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-29	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-29	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-29 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-29 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-29 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-30 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-30 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-30 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-31 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-31 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-31 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-32	Stud, 1/4 Dia.	—	—	85	Consumables / Hardware	OEM
25C-32	Stud, 1/4 Dia.	—	—	85	Consumables / Hardware	OEM
25C-32 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-32 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-32 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-33	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-33	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-33 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-33 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-33P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-34	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-34	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-34 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-34 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-34 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-35 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-35 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-35 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-36 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-36 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-36 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-37	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-37	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-37 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-37 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-37 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-38	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-38	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-38 P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-38 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-38 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-39	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-39	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-39 P07	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-39 P12	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM
25C-39P03	Stud, 1/4 Dia. Coarse Thread	—	—	85	Engine Accessories	OEM