# JASC 2160: Cabin Temperature Control System

- Type: JASC system/component code (FAA)
- ATA chapter: 21 Air Conditioning
- Title in the code table: CABIN TEMPERATURE CONTROL SYSTEM
- Service difficulty reports: 3,040
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=16
- Page: https://openairdocs.org/jasc/2160

## What it covers

The units and circuitry other than the control unit which are used for controlling the temperature of the air in the cockpit and cabin. Typical parts are control valves, thermal sensing devices, switches, amplifiers, and wiring.

## Service difficulty reports (3,040, newest 50)

- [SDR ABXA20261020475](https://openairdocs.org/sdr/ABXA20261020475), Oct 20, 2026: Boeing 767360. SENSOR. DEFECTIVE. AFTER BLOCK OUT AFT CABIN TEMP INOP CAUTION MSG, NON CREW DEFERRABLE AND RETURNED TO GATE (BTB) MTX GROUNDED A/C ANDDEFE (N487CM)
- [SDR DALA2026101905717](https://openairdocs.org/sdr/DALA2026101905717), Oct 9, 2026: Boeing 757351. VALVE. MALFUNCTIONED. RUBBER BURNING ODOR AT ROW 43, REPORTED BY PASSENGER. NOTED AFT TRIM VALVE ERATICALLY SWINGING FULL HOT SEVERAL TIMES. R (N586NW)
- [SDR ABXA20261002444](https://openairdocs.org/sdr/ABXA20261002444), Oct 2, 2026: Boeing 767381. CONTROLLER. FAULTED. DURING TAXI OUT AND ENGINE START, AFT FWD CABIN AND FLIGHT DECK TEMP MESSAGES. AFTER PUSH BACK AND ENGINE START. A/C RET (N391CM)
- [SDR CALA2026092219683](https://openairdocs.org/sdr/CALA2026092219683), Sep 21, 2026: Airbus A320232. ACTUATOR. FAULTED. THE AIRCRAFT CAN BE RELEASED BACK TO SERVICE AFTER EXPERIENCING A DIVERSION OR AIR TURN BACK DUE TO A MECHANICAL REASON, (N441UA)
- [SDR I5PA2026090468801](https://openairdocs.org/sdr/I5PA2026090468801), Sep 4, 2026: Boeing 757230. SENSOR. FAULTY. ETOPS SIGNIFICANT REPORT AND EVENT. FLIGHT DECK TEMP REACHED 75 DEGREES FOR OVER AN HOUR. THE MIX MANIFOLD SENSOR WAS RE (N688SL)
- [SDR YENA2026080300639](https://openairdocs.org/sdr/YENA2026080300639), Jul 31, 2026: Airbus A321271NX. CONTROLLER. MALFUNCTIONED. FLT # 488, LAX-BOS. (ETOPS) "AIRPLANE PROHIBITED FROM ER OPERATIONS DUE TO E2 ALERT LEVEL 3-IN-10 EVENT FLIGHT DECK & CA (N2180J)
- [SDR ABXA20260730339](https://openairdocs.org/sdr/ABXA20260730339), Jul 29, 2026: Boeing 767383. WARNING MESSAGE. ILLUMINATED. DURING TAXI, FWD CABIN TEMP EICAS MESSAGE. CREW RETURNED TO BLOCKS (BTB). MTC DEFERRED PER MEL 21-61-1-2. MPM 21-61-1 C/ (N219CY)
- [SDR I5PA2026072488802](https://openairdocs.org/sdr/I5PA2026072488802), Jul 24, 2026: Boeing 757230. CONTROLLER. FAULTY. FWD CAB TEMP, AFT CAB TEMP, FLT DECK TEMP EICAS MSG. R & R ZONE TEMP CONT PER AMM, OPS CHECK NORMAL. (N888LT)
- [SDR KY7A20260716001](https://openairdocs.org/sdr/KY7A20260716001), Jul 16, 2026: Frchld SA227DC. CONTROLLER. FAULTED. SMOKE IN CABIN, A/C BLOWING EXTREMELY HOT AIR. EMERGENCY DECLARED AND AIRCRAFT RETURNED TO FIELD. R & R RH FLOW CONTROL  (N820DC)
- [SDR CALA2026071617802](https://openairdocs.org/sdr/CALA2026071617802), Jul 16, 2026: Boeing 737924ER. SHUTOFF VALVE. FAULTED. UNABLE TO CONTROL FLIGHT DECK TEMP EXCESSIVELY COLD NO NON NORMAL. REPLACED TRIM AIR MODULATING VALVE IAW 21-61-21. PERF (N37464)
- [SDR ABXA20260705305](https://openairdocs.org/sdr/ABXA20260705305), Jul 5, 2026: Boeing 767381. CONTROLLER. DEFECTIVE. DURING TAXI OUT LEFT HAND PACK INOP ILLUMINATED. ACFT RETURNED TO THE GATE (BTB) AND MTX GROUNDED A/C. MTX DEFERRED LH P (N391CM)
- [SDR AALA202606184069](https://openairdocs.org/sdr/AALA202606184069), Jun 16, 2026: Boeing 777223. SHUTOFF VALVE. INOPERATIVE. AIRCRAFT WAS GROUNDED: AIRFLOW OFF LIGHT ILLUM ABOVE 250000 (RESET NO HELP) IN MDCR,. DECESION MADE TO RETURN TO MIA. AI (N750AN)
- [SDR CALA2026052016423](https://openairdocs.org/sdr/CALA2026052016423), May 18, 2026: Airbus A319131. CONTROLLER. FAULTED. COND ZONE REGUL FAULT EC AM ON CLB. TEMP CLBED AN D MAINTANED AB OVE 90F UNTIL DESCENT T/S PER TSM TASK 21-63-00-810-827 (N854UA)
- [SDR CALA2026052016421](https://openairdocs.org/sdr/CALA2026052016421), May 17, 2026: Boeing 7879. PCU. FAULTED. CABIN TEMP CONTROL, ONE OF THE LT PCU CHANNELS HAS FAILED. DB 42 GPM_GENERAL OPS (RIGHT 4) DB 42 GPM_GENERAL OPS (LEFT 1 (N19986)
- [SDR GTIA2026042739359](https://openairdocs.org/sdr/GTIA2026042739359), Apr 23, 2026: Airbus A320232. MEGAPHONE. INOPERATIVE. FA REPORTS FUMES SMELL AFT CABIN AFTER TAKE OFF-PER TSM 05-50-00-810-831-A DECISION TABLE TYPE 7 CORRECTIVE ACTION. PERF (N623NK)
- [SDR AALA202604021866](https://openairdocs.org/sdr/AALA202604021866), Apr 1, 2026: Boeing 737823. A/C PACK. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: LEFT PACK TRIP COULD NOT RESET. AIRCRAFT DIVERTED TO AND LA (N885NN)
- [SDR ABXA20260330139](https://openairdocs.org/sdr/ABXA20260330139), Mar 30, 2026: Boeing 767383. WARNING MESSAGE. ILLUMINATED. DURING TAXI, FWD CABIN TEMP EICAS MESSAGE AFTER PUSH BACK. DEFERRED PER MEL 21-61-1-2. MAINT PROCEDURE COMPLIED WITH 21- (N219CY)
- [SDR CALA2026032414816](https://openairdocs.org/sdr/CALA2026032414816), Mar 22, 2026: Boeing 737924. CONTROLLER. FAULTED. ON DEPARTURE CABIN TEMP WENT TO 40C. AT FL250 WOULD NOT COOL BE LOW 35C PERFORMED PACK TEMPERATURE CONTROL - BITE PROCED (N37408)
- [SDR ASAA2026031963889](https://openairdocs.org/sdr/ASAA2026031963889), Mar 19, 2026: Boeing 717200. A/C PACK. NOT REPORTED. WHEN ARRIVED AT PLANE TEMP WAS 84' INCREASED TO EXCESS OF 90'. GROUNDED - YES. TURN ON APU BLEED AND RUN RH PACK.GROUND  (N487HA)
- [SDR AALA202603026339](https://openairdocs.org/sdr/AALA202603026339), Feb 27, 2026: Boeing 737823. SENSOR. CLOGGED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING CLIMB, UNABLE TO MAINTAIN CABIN PRESSURE. AIRCRAFT A (N880NN)
- [SDR MISR202603027043](https://openairdocs.org/sdr/MISR202603027043), Feb 27, 2026: Cessna 680A. CONTROL VALVE. DEFECTIVE. COCKPIT TEMPERATURE WAS UNCONTROLLABLE IN NORMAL OR MANUAL MODE. COCKPIT DUCT TEMPERATURE REACHED A HIGH OF 241°F. CORR (N928QS)
- [SDR DALA2026021701090](https://openairdocs.org/sdr/DALA2026021701090), Feb 14, 2026: Airbus BD5001A10. SENSOR. DIRTY. DIVERTED TO ATL DUE TO HIGH CABIN TEMPERATURE WITH TRIM AIR ON MEL. CLEANED CABIN AND FLIGHT DECK TEMPERATURE SENSORS. (N103DU)
- [SDR DALA2026012800662](https://openairdocs.org/sdr/DALA2026012800662), Jan 26, 2026: Boeing 737932ER. CONTROLLER. FAULTED. PACK LIGHT ILLUMINATED IN FLT. FOLLOWED QRH. TRIP RESET WORKED, BUT TEMPORARY. ALSO HAD INTERMITTENT BURNING-CHEMICAL OD (N822DN)
- [SDR YENA2026011300023](https://openairdocs.org/sdr/YENA2026011300023), Jan 10, 2026: Airbus A321271NX. WARNING MESSAGE. FALSE ACTIVATION. FLT 1734, SFO-BOS (ETOPS). COND TRIM AIR SYS FAULT FWD CAB TRIM VALVE. TROUBLESHOT IAW TSM 21-63-00-810-803-A, PERFORMED (N2169J)
- [SDR AALA202601120471](https://openairdocs.org/sdr/AALA202601120471), Jan 10, 2026: Boeing 7378. CONTROLLER. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: CABIN AIR TEMPERATURE WAS UNCONTROLLABLY HOT. AIRCRAFT DIVERTED (N314RH)
- [SDR AALA202601129398](https://openairdocs.org/sdr/AALA202601129398), Jan 10, 2026: Boeing 7378. SHUTOFF VALVE. FAILED. AIRCRAFT WAS GROUNDED, AN EMERGENCY WAS DECLARED DUE TO: CABIN AIR TEMPERATURE WAS UNCONTROLLABLY HOT. AIRCRAFT DIVERTED (N314RH)
- [SDR QXEA2026011200008](https://openairdocs.org/sdr/QXEA2026011200008), Jan 10, 2026: Emb ERJ170200LR. A/C PACK. UNCONTROLLABLE. FLIGHT 2177. CKPT, FWD, AFT CABIN TEMP UNABLE TO BE CONTROLLED. BOTH HOT & COLD AIR. TEMP VALUES (ACTUAL) FLICKERING VAL (N644QX)
- [SDR YENA2026010700018](https://openairdocs.org/sdr/YENA2026010700018), Jan 6, 2026: Airbus A321271NX. HEATER. MALFUNCTIONED. FLT 301 FLL-LAX (ETOPS). FWD CABIN TEMP CONTROLABLE TURNED TO MAX HEAT AND TEMP WOULD NOT MOVE OFF 60 DEGREES AFT CABIN  (N2157J)
- [SDR DALA2026010800192](https://openairdocs.org/sdr/DALA2026010800192), Jan 5, 2026: Boeing 737932ER. CONTROL VALVE. FAULTED. DIVERTED TO TPA DUE TO CABIN TEMPERATURE UNCONTROLLABLE. REPLACED RIGHT PACK FLOW CONTROL VALVE, PRIMARY AND SECONDARY H (N876DN)
- [SDR YENA2026010500010](https://openairdocs.org/sdr/YENA2026010500010), Jan 4, 2026: Airbus A321271NX. VALVE. INOPERATIVE. FLT # 289 JFK-SAN (ETOPS). HOT AIR VALVE CONCIDERED INOPERATIVE. HOT AIR PRESS REGULATING VLV - N703 AND UP CLOSED POSIT (N2157J)
- [SDR YENA2026010500009](https://openairdocs.org/sdr/YENA2026010500009), Jan 4, 2026: Airbus A321271NX. VALVE. INOPERATIVE. FLT 348 LAS-JFK. (ETOPS). " COCKPIT TRIM VALVE INOPERATIVE. REMOVED AND REPLACED TRIM AIR VALVE (12HK) IAW AMM 21-63-51. (N2157J)
- [SDR DXTA2026010506395](https://openairdocs.org/sdr/DXTA2026010506395), Jan 1, 2026: Cessna 680SOV. CONTROL VALVE. STUCK. BURNING ODOR IN CABIN. GOT VERY HOT & CHKD TEMP CONTROLLER, TEMP FLASHING 300 & E5. ATTEMPTED TO ADJUST CONTROLLER TO RE (N387QS)
- [SDR DALA2026010200036](https://openairdocs.org/sdr/DALA2026010200036), Jan 1, 2026: Airbus BD5001A10. VALVE. FAULTED. AFTER ENGINE START, TRIM AIR WAS VERY HOT IN CKPT AND AFT DUCTS. 188+F IN CKPT, 184+F AFT. CYCLED TRIM AIR SWITCH AND FU (N136DQ)
- [SDR DXTA2025122306266](https://openairdocs.org/sdr/DXTA2025122306266), Dec 23, 2025: Emb EMB505. MODULATING VALVE. FAULTED. WHILE ON CLIMB OUT WE NOTICED A BURNING SMELL IN THE FLIGHT DECK ACCOMPANIED BY HIGH COCKPIT TEMPERATURE. SHORTLY AFTER  (N351QS)
- [SDR AALA202512232765](https://openairdocs.org/sdr/AALA202512232765), Dec 22, 2025: Airbus A320214. BYPASS VALVE. ODOR. AIRCRAFT WAS GROUNDED: BURNT PLASTIC ODOR IN THE CABIN DURING CLIMB. MAINTENANCE REPLACED THE TURBINE BYPASS VALVE 30HH  (N122US)
- [SDR YENA2025121001195](https://openairdocs.org/sdr/YENA2025121001195), Dec 9, 2025: Airbus A321271NX. SENSOR. FAULTED. FLT#34, CDG-BOS. (ETOPS) PACK 2 REGULATOR FAULT ( ECAM INDICATION ON BLEED PAGE PACK COMPRESSOR OUTLET TEMPERATURE ); PE (N4048J)
- [SDR ABXA202512054318](https://openairdocs.org/sdr/ABXA202512054318), Dec 4, 2025: Boeing 767316. VALVE. FAULTED. DURING TAXI OUT, AFT CABIN TEMP MESSAGE APPEARED BEFORE ENG START. AIRCRAFT RETURNED TO GATE (BTB). MAINTENANCE DEFERRED (N227CY)
- [SDR MJYA20251121013](https://openairdocs.org/sdr/MJYA20251121013), Nov 21, 2025: Doug DC915F. BUTTERFLY VALVE. STUCK. TWO HOURS INTO CRUISE AT FL 350 ENCOUNTERED A LOSS OF CABIN PRESSURE. RAN COM PROCEDURES CABIN ALTITUDE WARNING/RAPID DE (N783TW)
- [SDR IPXA2025112183093](https://openairdocs.org/sdr/IPXA2025112183093), Nov 21, 2025: Boeing 7478F. SENSOR. INOPERATIVE. ATB, TEMP ZONE L EICAS MESSAGE DISPLAYED DURING CRUISE. FOLLOWED QRH AND WAS UNABLE TO RESET SYSTEM. RESULTED IN ATB CMC (N617UP)
- [SDR HALA20251010312](https://openairdocs.org/sdr/HALA20251010312), Oct 9, 2025: Airbus A330343. VALVE. FAULTED. ETOPS - TRIM AIR VALVE INDICATION FOR COCKPIT TEMP INDOCATE AMBER XX. BUT CKPT TEMP CAN BE CONTROLLED NORMALLY. REMOVED  (N4621K)
- [SDR DXTA2025100305178](https://openairdocs.org/sdr/DXTA2025100305178), Oct 2, 2025: Cessna 560XL. DISPLAY. INOPERATIVE. AFTER TAKE OFF-APPROX. 1500 FEET AGL BOTH LT SEAT PFD & MFD DISPLAYS FAILED. WE RETURNED TO THE FIELD. PERFORMED THE OPS (N683QS)
- [SDR HALA2025F00002](https://openairdocs.org/sdr/HALA2025F00002), Sep 26, 2025: Airbus A330343. VALVE. FAULTED. ETOPS - COCKPIT TEMP VARIES BETWEEN 22C - 28C AT 12:30 TEMP CONTROL POSITION. REMOVED AND REPLACED TRIM AIR VALVE (637HK (N4663K)
- [SDR HALA20250926290](https://openairdocs.org/sdr/HALA20250926290), Sep 26, 2025: Airbus A330343. VALVE. FAULTED. ETOPS - COCKPIT TEMP VARIES BETWEEN 22C - 28C AT 12:30 TEMP CONTROL POSITION. REMOVED AND REPLACED TRIM AIR VALVE (637HK (N1611)
- [SDR HALA20250925289](https://openairdocs.org/sdr/HALA20250925289), Sep 23, 2025: Airbus A330343. SENSOR. FAULTED. ETOPS - COCKPIT TEMP CONTROLLER DOES NOT KEEP STABLE TEMPERATURE. REMOVED AND REPLACED TEMP SENSOR (651HK) IAW AMM 21-63 (N4663K)
- [SDR ABXA20250917230](https://openairdocs.org/sdr/ABXA20250917230), Sep 17, 2025: Boeing 767338. WARNING MESSAGE. ILLUMINATED. ON ENGINE START, FWD CABIN TEMP EICAS MSG ACCOMPLISHED. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE DEFERRED FWD CABI (N371CM)
- [SDR 2025F00213](https://openairdocs.org/sdr/2025F00213), Sep 3, 2025: Emb EMB505. FLOW VALVE. FAILED. ECS 1 & 2 FAILED IN FLIGHT, DEPRESSURING VALVE, PASSENGERS HEARD A POP SOUND, OXYGEN MASKS CAME OUT. (N4MT)
- [SDR CALA2025090308435](https://openairdocs.org/sdr/CALA2025090308435), Aug 29, 2025: Boeing 777222. SIGNAL COND UNIT. FAULTY. CHRONIC LVL 1 FOR LAV-GALLEY FAN L WITH MM SG 21-11041 LAVATORY/GALLEY VENTILATION FAN (LEFT) DOES NOT FOLLOW COMMAND (O (N768UA)
- [SDR HALA20250812245](https://openairdocs.org/sdr/HALA20250812245), Aug 11, 2025: Airbus A321271N. CONTROL VALVE. FAULTED. DIV - AFT CABIN VERY WARM DIV TO OAK: AT TOC NOTICED PACK 2 AMBER ON PRESS PG, BLEED PG. SHOWING NO PRESSURE & IP VALVE  (N226HA)
- [SDR DALA2025081105963](https://openairdocs.org/sdr/DALA2025081105963), Aug 11, 2025: Airbus A319114. DUCT. OBSTRUCTED. SHIP 3162 - MISC - DECLARED EMERGENCY DUE TO HOT CABIN CAUSING F/A SICKNESS. ALSO HAD FUEL SMELL REPORTED BY A CUSTOMER. (N362NB)
- [SDR DALA2025081206007](https://openairdocs.org/sdr/DALA2025081206007), Aug 9, 2025: Airbus A319114. CONTROL UNIT. FAULTED. ATB DUE TO ENG 1 & 2 BLEED STATUS FAULT AND A COND HOT AIR FAULT. NO BLEED INDICATIONS ON ECAM. CFDS FAILURE MESSAGE IND (N326NB)

All 3,040: https://openairdocs.org/jasc/2160/reports.md

## Other codes in chapter 21

- [JASC 2100](https://openairdocs.org/jasc/2100): Air Conditioning System (1,354 reports)
- [JASC 2110](https://openairdocs.org/jasc/2110): Cabin Compressor System (252 reports)
- [JASC 2120](https://openairdocs.org/jasc/2120): Air Distribution System (15,360 reports)
- [JASC 2121](https://openairdocs.org/jasc/2121): Air Distribution Fan (4,375 reports)
- [JASC 2130](https://openairdocs.org/jasc/2130): Cabin Pressure Control System (3,454 reports)
- [JASC 2131](https://openairdocs.org/jasc/2131): Cabin Pressure Controller (2,041 reports)
- [JASC 2132](https://openairdocs.org/jasc/2132): Cabin Pressure Indicator (94 reports)
- [JASC 2133](https://openairdocs.org/jasc/2133): Pressure Regulator/Outflow Valve (1,711 reports)
- [JASC 2134](https://openairdocs.org/jasc/2134): Cabin Pressure Sensor (40 reports)
- [JASC 2140](https://openairdocs.org/jasc/2140): Heating System (1,020 reports)
- [JASC 2150](https://openairdocs.org/jasc/2150): Cabin Cooling System (12,384 reports)
- [JASC 2161](https://openairdocs.org/jasc/2161): Cabin Temperature Controller (308 reports)
- [JASC 2162](https://openairdocs.org/jasc/2162): Cabin Temperature Indicator (69 reports)
- [JASC 2163](https://openairdocs.org/jasc/2163): Cabin Temperature Sensor (154 reports)
- [JASC 2170](https://openairdocs.org/jasc/2170): Humidity Control System (1,332 reports)
- [JASC 2197](https://openairdocs.org/jasc/2197): Air Conditioning System Wiring (497 reports)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.