ATA 21 — Air Conditioning

83,278 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
041510000	FAN	—	737-800 737-900	21	unknown	OEM
04390	Low Duct Pressure Transducer	Sensor Systems, LLC	King Air 200 747-100+3	21	Instruments	PMA
0450408-1	Air duct assembly	Aviation Enterprises	C337 Skymaster	21	Environmental / Cabin	PMA
04530181	VALVE	—	C172 Skyhawk	21	unknown	OEM
0496AD	Marker-"Pressure Differential Limit"	Aero Decals Inc	707 727+1	21	Consumables / Hardware	PMA
05-00787	ACS Air Vent - Grey	ACS Products	—	21	Environmental / Cabin	OEM
05-00859	NACA Inlet 904 Mi	—	—	21	Environmental Control	OEM
05-00862	NACA Inlet 001 He	—	—	21	Environmental Control	OEM
05-01906	Small Square Aluminum Vent Black	—	—	21	Environmental Control	OEM
05-03456	Muffler Shroud PA-18	—	PA-18 Super Cub	21	Environmental / Cabin	unknown
05-03457	Pre-Heat Shroud PA-18	—	PA-18 Super Cub	21	Environmental / Cabin	unknown
05-03478	Cessna Heavy Duty Muffler Shroud	—	—	21	Environmental / Cabin	unknown
05-04061	Steinair Eyeball Vent AV125B - 1.25 Inch - Black	—	—	21	Environmental Control	OEM
05-04063	Steinair Eyeball Vent AV125C - 1.25 Inch - Clear Aluminum	—	—	21	Environmental Control	OEM
05-04067	Eyeball Air Vent Adapter	—	—	21	Environmental Control	OEM
05-04068	3275 Large Square Eyeball Vent / Clear	—	—	21	Environmental Control	OEM
05-04070	3275 Large Square Eyeball Vent / Black	—	—	21	Environmental Control	OEM
05-04075	Cabin Air Ventilator	—	—	21	Environmental Control	OEM
05-04078	Kool Scoop Right Hand	—	—	21	Environmental Control	OEM
05-04079	Plastic Eyeball Air Vent - Black	—	—	21	Environmental Control	OEM
05-04080	Airflow Enhancement System	—	—	21	Environmental Control	OEM
05-04081	Plastic Eyeball Vent - Beige	—	—	21	Environmental Control	OEM
05-04082	Plastic Eyeball Air Vent - Gray	—	—	21	Environmental Control	OEM
05-04083	Cessna Pilot & Co-Pilot Air Vents	—	—	21	Environmental Control	OEM
05-04084	Steinair Eyeball Vent AV1625B - 1.75 Inch - Black	—	—	21	Environmental Control	OEM
05-04085	Cessna 210 Center Air Vents	—	—	21	Environmental Control	OEM
05-04086	Steinair Eyeball Vent AV1625C - 1.75 Inch - Clear Aluminum	—	—	21	Environmental Control	OEM
05-04087	Cessna 210 Rear Air Vents Set	—	—	21	Environmental Control	OEM
05-04091	Cessna Ventube™	—	—	21	Environmental Control	OEM
05-04092	Cessna 210 Fresh Air Vent System	—	—	21	Environmental Control	OEM
05-04249	NACA Inlet - Model 009-Mu-A	—	—	21	Environmental Control	OEM
05-04250	NACA Inlet - Model 009-Mu-B	—	—	21	Environmental Control	OEM
05-04412	Sml Rnd Eyeball Vent 2252-P Cl	—	—	21	Environmental Control	OEM
05-04413	Sml Rnd Eyeball Vent 2252-P Bl	—	—	21	Environmental Control	OEM
05-04414	L-R Flng Eyeball Vnt R3275-P C	—	—	21	Environmental Control	OEM
05-04415	L-R Flng Eyeball Vnt R3275-P B	—	—	21	Environmental Control	OEM
05-04464	Aveo Ball Vent Ave-Bvblk-200	Aveo Engineering	—	21	Environmental / Cabin	OEM
05-04645	Vent Tube Adapter Bracket Cessna	—	—	21	Environmental Control	OEM
05-04650	Aveoairmaxi Vent Black 2 Hose	Aveo Engineering	—	21	Environmental / Cabin	OEM
05-04652	Aveoairmaxi Vent Silver 2 Dull Finish	Aveo Engineering	—	21	Environmental / Cabin	OEM
05-05002	Piper J-3 Firewall Cabin Air Box	—	—	21	Environmental Control	OEM
05-05171	Aveo Sq Vent Black	Aveo Engineering	—	21	Environmental / Cabin	OEM
05-07527	Cabin Heater Box 18-Chb	—	—	21	Environmental / Cabin	OEM
05-07558	Defroster Kit 3242-12	—	—	21	Environmental / Cabin	OEM
05-07559	Defroster Kit 3242-18	—	—	21	Environmental / Cabin	OEM
05-07693	Rear Seat Heater With Hose 3175	—	—	21	Environmental / Cabin	OEM
05-07820	Luscombe Cabin Heat Shroud	—	—	21	Environmental / Cabin
05-08115	Luscombe Carburator & Cabin Heat Shroud	—	—	21	Environmental / Cabin
05-08715	Aeronca Heat Muff	—	—	21	Environmental / Cabin	OEM
05-08995	T-Craft Heat Shroud	—	—	21	Environmental / Cabin	OEM