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
05-10785	Replacement Small Round Vent 2252-C Clear	—	—	21	Environmental Control	OEM
05-10860	K2U Piper Cabin Air Inlet Scoop PA-24-2180 PA-24-250	—	—	21	Environmental Control	OEM
05-12637	ACS Dual Air Vent Grey 10690G	—	—	21	Environmental Control	OEM
05-14755	Tanis Avionics / Cabin Heater With Pin Connector - AC 100-240V	Tanis	—	21	Environmental / Cabin	PMA
05-16024	Premier Aerospace Fitting Assembly Air - P78609-00	—	—	21	Environmental / Cabin
05-16954	McFarlane Knob Round Black Cabin Air - 6277BA	—	—	21	Environmental / Cabin
05-16957	McFarlane Knob Round Black Defrost - 6277BD	—	—	21	Environmental / Cabin
05-16958	McFarlane Knob Round Black Cabin Heat - 6277BH	—	—	21	Environmental / Cabin
05-16962	McFarlane Knob Round Clear Cabin Air - 6277CA	—	—	21	Environmental / Cabin
05-16964	McFarlane Knob Round Clear Defrost - 6277CD	—	—	21	Environmental / Cabin
05-16965	McFarlane Knob Round Clear Cabin Heat - 6277CH	—	—	21	Environmental / Cabin
05-16968	McFarlane Knob Round Blue Cabin Air - 6277LA	—	—	21	Environmental / Cabin
05-17400	Rans Aircraft Cabin Heater	—	—	21	Environmental / Cabin	unknown
05-18962	McFarlane Cabin Environmental Control For Piper Aircraft	McFarlane Aviation	—	21	Environmental / Cabin	PMA
05-27123	Turbo Heat Cabin Heat Muff Custom Configuration	—	—	21	Environmental / Cabin	unknown
05-27419	Cessna Air Valve AV4081-3	—	—	21	Environmental / Cabin
05-27438	PA 28 / 32 Air Vent Assembly - Gray - Pack Of 4	—	—	21	Environmental Control	OEM
05-27547	Tanis Avionics / Cabin Heater With Pin Connector - TAU03323	Tanis	—	21	Environmental / Cabin	PMA
05-28212	Ercoupe Cabin Heat Muff - E335000	—	—	21	Environmental / Cabin
05-28213	Ercoupe Carburetor Heat Muff - E334000	—	—	21	Environmental / Cabin
05-28827	Starboard Aero - AeroVent	—	—	21	Environmental Control	OEM
05-32529	Cessna Duct F222060	—	—	21	Environmental Control	OEM
05-32575	Aveo Air Mesh Ball Vent Silver AVE-AAMS-200	Aveo Engineering	—	21	Environmental / Cabin	OEM
05-32581	Aveo Maxi Mesh Ball Vent Silver AVEAAMMS-200	Aveo Engineering	—	21	Environmental / Cabin	OEM
050008	COMPRESSOR	—	AS350 Ecureuil H125	21	Environmental / Cabin	OEM
05000846	BLOWER MOTOR	—	AS350 Ecureuil H125	21	Electromechanical	unknown
050021	MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
0500211	MOTOR	—	AS350 Ecureuil H125	21	Electromechanical	unknown
0500242	RESISTOR	—	AS350 Ecureuil H125	21	unknown	OEM
050031	BRUSHES	—	AS350 Ecureuil H125	21	unknown	OEM
0500346	BLOWER	—	AS350 Ecureuil H125	21	unknown	OEM
050037	MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
0500521	BLOWER MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
0500547	MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
0500844	BLOWER MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
0500846	BLOWER MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
050084661	BLOWER MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
0500847	BLOWER MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
05008471	MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
050085	BLOWER	—	AS350 Ecureuil H125	21	Environmental / Cabin	unknown
0500Y46	MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
050142	BLOWER MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
050143	BLOWER MOTOR	—	AS350 Ecureuil H125+1	21	unknown	OEM
050145	BLOWER MOTOR	—	AS350 Ecureuil H125+1	21	unknown	OEM
050173	BLOWER MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
05092-20E501	duct seal	sikorsky aircraft corporation	—	21	Consumables / Hardware	OEM
05150892	BRACKET	—	C172 Skyhawk	21	unknown
0520-21-0001	Adapter, Cabin Air Mixer Assy	Metal Innovations Inc	C185 Skywagon	21	Environmental / Cabin	PMA
0522844	MOTOR	—	AS350 Ecureuil H125	21	unknown	OEM
0570331	DIFFUSER	—	C172 Skyhawk	21	unknown	OEM