ATA 21 — Air Conditioning

83,755 parts classified under this chapter

Reliability rollup

100%Median scrap propensity

4,868 parts · 17,977 SDR reports

From FAA Service Difficulty Reports

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
103576-36	Valve, Outflow	Honeywell	—	21	Environmental / Cabin	PMA
103576-4	Valve, Outflow/Safety	—	C414	21	—	OEM
103576-4Series 6	Valve, Outflow/Safety	Honeywell	C414	21	Pneumatics	PMA
10357620RX	VALVE	—	C441 Conquest	21	unknown
10357626	OUTFLOW VALVE	—	Eclipse 550	21	Environmental / Cabin
1035982	PIN	—	King Air 90	21	Consumables / Hardware	OEM
103626-1	Outflow/Safety Valve	Honeywell	720	21	Environmental / Cabin	PMA
103626-2	Outflow/Safety Valve	Honeywell	—	21	Environmental / Cabin	PMA
1036311	OUTFLOW VALVE	—	DC-9 MD-82	21	Environmental / Cabin	OEM
1036322	OUTFLOW VALVE	—	CRJ-200 Challenger 604	21	unknown	OEM
1036323	OUTFLOW VALVE	—	CRJ-200 Challenger 604	21	unknown	OEM
1036361	OUTFLOW VALVE	Honeywell	DC-9 DC-9-50+6	21	Environmental / Cabin	OEM
103638-1 Series 3	Valve, Outflow/Safety	Honeywell	—	21	Pneumatics	PMA
103638-1 Series 4	Valve, Outflow/Safety	Honeywell	—	21	Pneumatics	PMA
103638-1 (Series 2)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-1 (Series 3)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-1 (Series 4)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-10 Series 3	Valve, Outflow/Safety	Honeywell	—	21	Pneumatics	PMA
103638-10 (Series 1)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-10 (Series 2)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-10 (Series 3)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-2 Series 3	Valve, Outflow/Safety	Honeywell	—	21	Pneumatics	PMA
103638-2 (Series 2)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-2 (Series 3)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-2 (Series 4)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-4	Outflow/Safety Valve	Honeywell	—	21	Pneumatics	PMA
103638-8 Series 1	Valve, Outflow/Safety	Honeywell	—	21	Pneumatics	PMA
103638-8 Series 3	Valve, Outflow/Safety	Honeywell	—	21	Pneumatics	PMA
103638-8 (Series 1)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-8 (Series 2)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-8 (Series 3)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-9 Series 1	Valve, Outflow/Safety	Honeywell	—	21	Pneumatics	PMA
103638-9 Series 3	Valve, Outflow/Safety	Honeywell	—	21	Pneumatics	PMA
103638-9 (Series 1)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-9 (Series 2)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
103638-9 (Series 3)	Valve, Outflow/ Safety	Honeywell	—	21	Environmental / Cabin	PMA
1036383	OUTFLOW VALVE	—	PA-31T Cheyenne	21	Environmental / Cabin	OEM
103642-2	VALVE	Honeywell	757 767	21	—	OEM
1036421	RELIEF VALVE	—	757-200 757+1	21	unknown	OEM
1036423	OUTFLOW VALVE	Boeing	757-200 767-300+2	21	Pneumatics	OEM
1036441	OUTFLOW VALVE	ALIDSG	Challenger 604	21	Environmental / Cabin	OEM
103646-1	Outflow Safety Valve	Honeywell	1900D	21	Pneumatics	PMA
1036464	OUTFLOW VALVE	—	1900D	21	Environmental / Cabin	PMA
103648-14	Valve, Outflow	Honeywell	—	21	Environmental / Cabin	PMA
103648-3	Outflow/Safety Valve	Honeywell	—	21	Pneumatics	PMA
103648-6	Outflow/Safety Valve	Honeywell	—	21	Pneumatics	PMA
1036481	OUTFLOW VALVE	—	King Air 90 King Air 100	21	Environmental / Cabin	PMA
10364818	OUTFLOW VALVE	—	King Air 300	21	Environmental / Cabin	OEM
1036642	OUTFLOW VALVE	—	Challenger 604	21	Environmental / Cabin	OEM
1036721	OUTFLOW VALVE	—	Dash 8-400 Dash 8	21	unknown