ATA 21 — Air Conditioning

78,383 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
20792-01AC	VALVE-OUTFLOW	—	—	21	Environmental / Cabin
20792-02AC	VALVE-OUTFLOW	—	—	21	Environmental / Cabin
20792-03AC	VALVE-OUTFLOW	—	—	21	Environmental / Cabin
20792-04AC	VALVE-OUTFLOW	—	—	21	Environmental / Cabin
2079201AA	OUTFLOW VALVE	—	A330-300	21	unknown	OEM
20793-01AA	cabin pressure controller	Boeing	—	21	Avionics / Electronics	OEM
20793-02AB	cabin pressure controller	Boeing	—	21	Avionics / Electronics	OEM
20793-30BA	CONTROLLER-PRESSURE	—	—	21	Environmental / Cabin
20793-31BB	CONTROLLER-PRESSURE	—	—	21	Environmental / Cabin
20793-41BC	CONTROLLER-PRESSURE	—	—	21	Environmental / Cabin
20793-42BC	CONTROLLER-PRESSURE	—	—	21	Environmental / Cabin
2079303AC	CONTROLLER	Airbus	—	21	Electromechanical
2079801	OUTFLOW VALVE	NORD	737-700 737-900+1	21	Environmental / Cabin
2080029-104	Valve - Air Release	Parker Hannifin	A350-1000	21	Pneumatics	PMA
2080136-101	Heat Exchanger Assembly	Parker Hannifin	—	21	Environmental / Cabin	PMA
20841-01	ACTUATOR	Hamilton Sundstrand	737	21	Environmental / Cabin	OEM
209-072-418-009	Cap Air Distribution Duct	Bell Helicopter Textron Inc (formerly Aeronautical Accessories Inc)	Bell 214	21	Environmental / Cabin	PMA
20916010800	OUTFLOW VALVE	—	Embraer EMB-120 Brasilia	21	Environmental / Cabin	PMA
2091G010800	OUTFLOW VALVE	EMB	Embraer EMB-120 Brasilia	21	Environmental / Cabin	OEM
2093K010800	VALVE OUTFLOW	—	Embraer EMB-120 Brasilia	21	Environmental / Cabin
20949002	CONVERTER	—	A319 A319-100	21	unknown	OEM
2095F010800	OUTFLOW VALVE	—	ATR 42	21	Environmental / Cabin	OEM
2095F030800	OUTFLOW VALVE	—	ATR 42-300 ATR 42	21	Pneumatics	OEM
2096H010800	OUTFLOW VALVE	HERMETIC	ATR 42 ATR 72	21	Environmental / Cabin
2096H020800	OUTFLOW VALVE	—	—	21	Pneumatics
209748	impeller	zodiac aerospace	—	21	Environmental / Cabin	unknown
2097H020900	OUTFLOW VALVE	—	Dornier 328	21	Environmental / Cabin	OEM
2097J011000	OUTFLOW VALVE	—	Jetstream 41	21	Environmental / Cabin
2097K011100	OUTFLOW VALVE	EMB	ERJ-135 ERJ-145	21	Environmental / Cabin
2097K02110	OUTFLOW VALVE	—	ERJ-145	21	Environmental / Cabin	OEM
2097K021100	OUTFLOW VALVE	EMB	ERJ-135 ERJ-145	21	Environmental / Cabin	OEM
20995-01AB	ACTUATOR	Hamilton Sundstrand	737	21	Environmental / Cabin	OEM
20995-02AC	ACTUATOR	Hamilton Sundstrand	737	21	Environmental / Cabin	OEM
20995-03AC	ACTUATOR	Hamilton Sundstrand	737	21	Environmental / Cabin	OEM
20996011100	OUTFLOW VALVE	—	ERJ-135	21	unknown	OEM
2099J020900	OUTFLOW VALVE	—	Dornier 328	21	Environmental / Cabin	OEM
2099K021000	OUTFLOW VALVE	—	Jetstream 41	21	Environmental / Cabin	OEM
2099L01110	OUTFLOW VALVE	—	ERJ-145	21	unknown	OEM
2099L011100	OUTFLOW VALVE	Parker Hannifin	ERJ-135 ERJ-145	21	Environmental / Cabin
2099L021100	OUTFLOW VALVE	—	ERJ-135 ERJ-145	21	unknown	OEM
2099LO11100	OUTFLOW VALVE	EMB	ERJ-135 ERJ-145	21	Environmental / Cabin	OEM
2099S011500	OUTFLOW VALVE	—	ERJ-135	21	Pneumatics	OEM
209K011100	OUTFLOW VALVE	—	ERJ-145	21	Pneumatics	OEM
209K021100	OUTFLOW VALVE	—	ERJ-145	21	Environmental / Cabin	OEM
20C97	Tube, Universal Combustion	—	—	21	Environmental / Cabin	OEM
20C97	Tube, Universal Combustion	—	—	21	Environmental / Cabin	OEM
20D10-2 or 20D10-3	Coalescer Filter	Keddeg Company	C310 DC-10+2	21	Environmental / Cabin	PMA
20D102	COALESCER BAG	DOUG	DC-10 MD-11+3	21	Fuel Systems	OEM
20D35	EXHAUST	—	—	21	Engine Accessories	OEM
20D35-1 20D35-1EL	Heater	—	—	21	Environmental / Cabin	OEM