ATA 21 — Air Conditioning

82,987 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
-11A-C	Air Outlet	—	707-320 737-100	21	—	OEM
-18A	Air Outlet	—	707-320 737-100	21	—	OEM
-19A-D	Air Outlet	—	707-320 737-100	21	—	OEM
-23S	Air Outlet	—	707-320 737-100	21	—	OEM
-30 Refrigeration Pack 738443-15 Use in Air Cycle Machine 738384-3	Cooling Fan	—	C441 Conquest MD 500	21	Environmental / Cabin	OEM
-501 & -502	Prssurization Switch	—	—	21	—	OEM
-501 & -503	Switch, Pressurization System	—	—	21	—	OEM
-5D	Assembly, Return Air Grill, Medium	—	727 737	21	—	OEM
-64	ECS Duct Kit	—	757-200	21	—	OEM
-64	ECS Duct Kit	—	757-200	21	—	OEM
-74	ECS Duct Kit	—	757-200	21	air conditioning component	OEM
-74	ECS Duct Kit	—	757-200	21	unknown	OEM
-82	ECS Duct Kit	—	757-200	21	unknown	OEM
-82	ECS Duct Kit	—	757-200	21	air conditioning component	OEM
-84	ECS Duct Kit	—	757-200	21	—	OEM
-84	ECS Duct Kit	—	757-200	21	—	OEM
-8A	Assembly, Return Air Grill, Medium	—	727 737	21	—	OEM
-90	ECS Duct Kit	—	757-200	21	unknown	OEM
-90	ECS Duct Kit	—	757-200	21	air conditioning component	OEM
-95	ECS Duct Kit	—	757-200	21	—	OEM
-95	ECS Duct Kit	—	757-200	21	—	OEM
-96	ECS Duct Kit	—	757-200	21	—	OEM
-96	ECS Duct Kit	—	757-200	21	—	OEM
-97	ECS Duct Kit	—	757-200	21	—	OEM
-97	ECS Duct Kit	—	757-200	21	—	OEM
(11290-2)	Valve	—	737-300 737-400+7	21	—	OEM
(11290-2)	Valve	—	737-300 737-400+7	21	—	OEM
(182597-001)	Network Switch - CCS	—	787-8	21	—	OEM
(213T3112-33)	DUCT ASSY -HEADER	—	767-200 767-300+1	21	—	OEM
(215N1002-83)	Temp Sensor Assy	—	—	21	—	OEM
(215N1002-84)	Temp Sensor Assy	—	757-300	21	—	OEM
(215N2102-15)	Fan Assy	—	767-200	21	—	OEM
(215N2102-16)	Fan Assy	—	767-200	21	—	OEM
(215T1111-1)	Fan Assy	—	767-200	21	—	OEM
(233N3203-1025)	Panel Assy	—	—	21	—	OEM
(233N3203-24)	Panel Assy	—	757-200	21	—	OEM
(233N3203-29)	Panel Assy	—	757-200	21	—	OEM
(233N3203-300)	Panel Assy	—	—	21	—	OEM
(233N3203-301)	Panel Assy	—	757-200	21	—	OEM
(233N3203-337)	Panel Assy - Equip Cooling M10067	—	—	21	—	OEM
(233N3203-34)	Panel Assy	—	757-200	21	—	OEM
(233N3203-36)	Panel Assy	—	757-200	21	—	OEM
(233N3217-300)	Panel Assy	—	757-200	21	—	OEM
(233N3217-300)	Panel Assy	—	757-200	21	—	OEM
(233N3217-304)	Panel Assy	—	757-200	21	—	OEM
(233N3231-300)	Panel Assy	—	757-200	21	—	OEM
(233N3231-301)	Panel Assy	—	757-200	21	—	OEM
(233N3231-5)	Panel Assy - High Alt Warning M10756	—	757-200	21	—	OEM
(233N7520-1)	Module Sub-Assy - Cabin Telephone	—	757-200	21	—	OEM
(233N7520-300)	Module Assy - Cabin Telephone, M11749	—	757-200	21	—	OEM