# JASC 2161: Cabin Temperature Controller - Type: JASC system/component code (FAA) - ATA chapter: 21 Air Conditioning - Title in the code table: CABIN TEMPERATURE CONTROLLER - Service difficulty reports: 308 - FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=16 - Page: https://openairdocs.org/jasc/2161 ## What it covers For reports of the parts within the cabin temperature control unit. A typical entry would only reference the "control unit" if specific part numbers are not available. ## Service difficulty reports (308, newest 50) - [SDR ABXA20260716323](https://openairdocs.org/sdr/ABXA20260716323), Jul 16, 2026: Boeing 767338. CONTROLLER. FAULTED. DUIRNG TAXI OUT AFTER ENG START WE GOT AFT CABIN TEMP, FWD CABIN TEMP , FLT DECK TEMP INOP. CAME ON AND A/C RETURNED TO (N219CY) - [SDR IPXA2026070971659](https://openairdocs.org/sdr/IPXA2026070971659), Jul 9, 2026: Airbus A300F4622R. CONTROLLER. FAILED. EMERGENCY DECLARED AT CRUISE 340, NR 2 A/C PACK FAILED, RAN ECAM NR 1 A/C PACK ALSO FAILED. INITIATED DESCENT TO 10,000 (N148UP) - [SDR CALA2025041003677](https://openairdocs.org/sdr/CALA2025041003677), Apr 8, 2025: Boeing 737824. CONTROLLER. DEFECTIVE. IN AIR RECEIVED LEFT PACK LIGHT. WOULD NOT CLEAR WITH TRIP RESET FLAGGED AS SDR SUGGEST TROUBLESHOOTING PER THE FOLLOWIN (N76526) - [SDR KY7A2024040800038](https://openairdocs.org/sdr/KY7A2024040800038), Jan 30, 2024: Swrngn SA227AC. CABLE. UNKNOWN. LEFT THROTTLE NOT RESPONSIVE. R &R LH POWER CABLE IAW FAIRCHILD SA227 MM CHAPTER 76-10-00. OPS GOOD. (N31171) - [SDR IPXA2023082162818](https://openairdocs.org/sdr/IPXA2023082162818), Aug 3, 2023: Boeing 76734AF. UNKNOWN. CRACKED. *** SUPPLEMENTAL SDR *** FAULT - FOUND MAIN DECK CARGO ZONE TEMP SENSOR COVER CRACK AT STA 1164 RIGHT SIDE (REPLACE) REV (N314UP) - [SDR IPXA2023082162263](https://openairdocs.org/sdr/IPXA2023082162263), Aug 3, 2023: Boeing 76734AF. UNKNOWN. UNKNOWN. *** SUPPLEMENTAL SDR *** FAULT - FOUND MAIN DECK CARGO ZONE TEMP SENSOR COVER CRACK AT STA 654+33 RIGHT SIDE (REPLACE) R (N314UP) - [SDR IPXA202308030004](https://openairdocs.org/sdr/IPXA202308030004), Aug 3, 2023: Boeing 76734AF. UNKNOWN. UNKNOWN. *SDR FILED OPEN* FAULT - FOUND MAIN DECK CARGO ZONE TEMP SENSOR COVER CRACK AT STA 654+33 RIGHT SIDE (REPLACE) OK TO WOR (N314UP) - [SDR ABXA2023041152](https://openairdocs.org/sdr/ABXA2023041152), Apr 8, 2023: Boeing 767231. MODULATING VALVE. FAULTED. AFTER ENGINE START WE GOT AN FLT DECK TEMP EICAS RAN THROGH ABNORMAL AND COULD NOT CONTROL HEAT. AIRCRAFT BACK TO BLOCK (N651GT) - [SDR AALA202303272902](https://openairdocs.org/sdr/AALA202303272902), Mar 24, 2023: Boeing 737823. CONTROLLER. FAULTY. AIRCRAFT WAS GROUNDED: LEFT AMBER ENGINE ANTI ICE LIGHT ILLUMINATED ON CLIMB OUT. FLIGHT DIVERTED TO CLT LANDING SAFELY. (N324RA) - [SDR ABXA2023011207](https://openairdocs.org/sdr/ABXA2023011207), Jan 11, 2023: Boeing 767281. CABIN AIR SYS. FAULT MESSAGE. FWD CABIN TEMP EICAS ADVISORY MSG. FWD CABIN TEMP INOP DISCRETE LIGHT ILLUMINATED. AIRCRAFT BACK TO BLOCK AND GROUNDED B (N768AX) - [SDR NACA2023010700002](https://openairdocs.org/sdr/NACA2023010700002), Jan 7, 2023: Boeing 767323. SENSOR. FAULT MESSAGE. LEFT PACK TEMP EICAS MESSAGE ON CLIMBOUT. FOLLOWED QRH, MESSAGE CLEARED. PERFORMED LEFT PACK TEMP CONTROLLER BITE PER AM (N399CM) - [SDR CALA2022101202764](https://openairdocs.org/sdr/CALA2022101202764), Oct 10, 2022: Boeing 7879. SENSOR. UNSERVICEABLE. CABIN TEMP UNCONTROLABLE ROWS 30-35 EXTREMELY HOT / REMOVED AND REPLACED ZONE C AIR TEMP SENSOR REFERENCE AMM 21-61-05-0 (N25982) - [SDR GTIA2022092936683](https://openairdocs.org/sdr/GTIA2022092936683), Sep 27, 2022: Airbus A320232. NONE. NONE. DIRTY SOCK SMELL/ODOR IN BOTH FLIGHT DECK AND CABIN DURING DESCENT. SMELL SEEMED TO GO AWAY AFTER TURNING PACK 1 OFF ( P (N652NK) - [SDR GTIA2022092336678](https://openairdocs.org/sdr/GTIA2022092336678), Sep 22, 2022: Airbus A320232. NONE. NONE. ON DESCENT PASSING FLT LEVEL 12,000 WE COULD SMELL FUMES (WET SOCK) UNTIL PACK 1 WAS SHUT OFF ( PACKS A320 WITH MOD 3128 (N631NK) - [SDR NACA2022082000002](https://openairdocs.org/sdr/NACA2022082000002), Aug 20, 2022: Boeing 767. NONE. NONE. AFT CABIN TEMP EICAS MSG. BITE ZONE TEMP BOX REF AMM 21-61-06-02. MSG CLEARED NO DEFECTS NOTED OPS CHECK GOOD. (N321CM) - [SDR DALA2022071504903](https://openairdocs.org/sdr/DALA2022071504903), Jul 11, 2022: Boeing 737. NONE. NONE. SHIP 3832 MISC/DE- DUE TO COCKPIT TEMPERATURE WAS HOT AND UNCONTROLLABLE. CORRECTIVE ACTION: RESET CIRCUIT BREAKERS. OPS (N832DN) - [SDR NACA2022070600001](https://openairdocs.org/sdr/NACA2022070600001), Jul 6, 2022: Boeing 767323. NONE. NONE. SUPPLEMENTAL INFORMATION - PERFORMED BITE TEST OF ZONE TEMP CONTROLLER PER AMM 21-61-03 NO CURRENT OR PREVIOUS FAULT DIS (N321CM) - [SDR CALA2022070401634](https://openairdocs.org/sdr/CALA2022070401634), Jul 1, 2022: Boeing 767322. CONTROLLER. FAILED. MID CABIN TEMP EICAS C THE MID CABIN SUPPLY DUCT TEMPERATURE IS MORE THAN 190 DEGREES F (88 DEGREES C); OR THE ZONE TEMP (N662UA) - [SDR ASAA2022062438788](https://openairdocs.org/sdr/ASAA2022062438788), Jun 24, 2022: Boeing 737990ER. A/C PACK. WARNING LIGHT. LEFT PACK LIGHT ILLUMINATED DURING DESCENT BELOW FL260 SINGLE PACK LIGHT STAYED ILLUMINATED. GROUNDED - YES. PERFORMED P (N402AS) - [SDR CALA2022053001396](https://openairdocs.org/sdr/CALA2022053001396), May 30, 2022: Boeing 737824. CIRCUIT BREAKER. TRIPPED. LEFT PACK TRIP OFF AFTER TAKEOFF. RESET BUT ELECTED TO RETURN TO DEN PER FIM TASK 21-62 TASK 835 BIT ZONE TEMP CONTROLLE (N13227) - [SDR DALA2022052303521](https://openairdocs.org/sdr/DALA2022052303521), May 23, 2022: Boeing 737832. VALVE. INOPERATIVE. SHIP 3749 -ATB- DUE TO AIRCRAFT CABIN EXTREMELY HOT. CORRECTIVE ACTION: REPLACED LT-RT STANDBY TEMP CONTROL VALVES. REPL (N3749D) - [SDR NACA2022050800001](https://openairdocs.org/sdr/NACA2022050800001), May 8, 2022: Boeing 767323. NONE. NONE. AFT CABIN TEMP INOP. PERFORMED CABIN ZONE TEMP CONTROL TEST ON AFT CABIN TEMP PER AMM 21-61-00 OPS CHECK GOOD. AC REMAIN (N321CM) - [SDR ASAA2022050338187](https://openairdocs.org/sdr/ASAA2022050338187), May 3, 2022: Boeing 737890. CONTROL VALVE. FAULTY. RIGHT PACK LIGHT ILLUMINATED AFTER LANDING. GROUNDED - YES. ACCOMPLISHED PACK / ZONE TEMP CONTROLLER BITECK PER B737-800 (N590AS) - [SDR NACA2022042300001](https://openairdocs.org/sdr/NACA2022042300001), Apr 23, 2022: Boeing 767323. NONE. NONE. LEFT PACK TEMP MSG ON EICAS ON GROUND - DURING PREFLIGHT. PERFORMED BITE TEST L PACK SYSTEM IS OK FOR NOW REF 21-60-00 N (N321CM) - [SDR NACA2022042200001](https://openairdocs.org/sdr/NACA2022042200001), Apr 22, 2022: Boeing 767323. MODULATING VALVE. FAILED. AFT CABIN TEMP EICAS MSG. AFT CABIN TEMP EICAS MSG DEFERRED PER MEL 21-61-01-02 CAT C @ 0927Z, 4/22/22 AC REMAINS ETOPS (N321CM) - [SDR NACA2022040500002](https://openairdocs.org/sdr/NACA2022040500002), Apr 4, 2022: Boeing 767. CONTROLLER. FAILED. CABIN TEMPERATURE REMAINED AT 86 DEGREES F, CABIN WOULD NOT/COULD NOT COOL. REMOVED AND REPLACED ZONE TEMP CONTROLLER, O (N321CM) - [SDR JIKA2022033101](https://openairdocs.org/sdr/JIKA2022033101), Mar 31, 2022: Frchld SA227CC. CONTROLLER. BROKEN. AMF 1088 - DURING FLIGHT, JUST BEFORE LANDING, PILOT NOTED SMOKE IN THE COCKPIT. THE CONTROL AIR FAN SOUNDED LIKE IT WAS (N672AV) - [SDR NACA2022032800002](https://openairdocs.org/sdr/NACA2022032800002), Mar 28, 2022: Boeing 767323. VALVE. FAILED. AFT CABIN TEMP EICAS MSG AND DISCRETE LIGHT ON. REMOVED AND REPLACED AFT TRIM AIR MODULATING VALVE, OPS CHECK AS PER AMM (N351CM) - [SDR I5PA2022031692202](https://openairdocs.org/sdr/I5PA2022031692202), Mar 16, 2022: Boeing 757260PF. VALVE. FAULTY. FWD CABIN AUTO EICAS MSG... REPLACED TRIM AIR MOD VALVE. (N922TS) - [SDR VNAA202203081112](https://openairdocs.org/sdr/VNAA202203081112), Mar 3, 2022: Cndair CL6002D24. SENSOR. FAULT MESSAGE. PILOTS NOTED SMOKE COMING FROM AIR VENT WHEN ENGAGING L PACK. ATTEMPTED TO RECREATE THE EVENT AND NOTED SMOKE STILL COMI (N563NN) - [SDR HALA2022013100034](https://openairdocs.org/sdr/HALA2022013100034), Jan 29, 2022: Airbus A321271N. NONE. NONE. BTB AFTER ENGINE STARTS FWD CRG HEAT / FWD CRG VENT // PERFORMED RESET AND BITE TEST IAW AMM 21-28-00. NO FAULTS NOTED A (N230HA) - [SDR I5PA2021112675708](https://openairdocs.org/sdr/I5PA2021112675708), Nov 26, 2021: Boeing 75729J. CONDENSER. UNSERVICEABLE. COCKPIT TEMP RUNNING WARM. REMOVED AND REPLACED LEFT PACK CONDENSER REF AMM 21-51-10 PG 401. (N757QM) - [SDR UIEA2021111202405](https://openairdocs.org/sdr/UIEA2021111202405), Nov 12, 2021: Boeing 767324. NONE. NONE. L PACK TEMP EICAS DISPLAYED(

PERFORMED LEFT PACK TEMP CONTROLLER BITE TEST IAW 21-51-00-705-001. EICAS MSG CLEARED.

PERFORMED BITE T (N1499A) - [SDR DALA2021110206767](https://openairdocs.org/sdr/DALA2021110206767), Oct 30, 2021: Airbus A319114. NONE. NONE. SHIP 3153 - REJECTED TAKEOFF FOR HOT AIR PRESSURE REGULATING VALVE MESSAGE. CORRECTIVE ACTION: PERFORMED COCKPIT AND CAB (N353NB) - [SDR UIEA2021102602289](https://openairdocs.org/sdr/UIEA2021102602289), Oct 26, 2021: Boeing 767328. RELAY. NONE. REPEAT WRITE-UP. AUTOMATIC FLIGHT DECK TEMPERATURE CONTROL OPERATES NORMALLY ON THE GROUND BUT UNCONTROLLABLE IN FLIGHT, (N1499A) - [SDR UIEA2021101902250](https://openairdocs.org/sdr/UIEA2021101902250), Oct 19, 2021: Boeing 76736N. CONTROLLER. NONE. COCKPIT TEMP CONTROL ERRATIC IN AUTO. TRIM VALVE CYCLES FULL OPEN AND CLOSED. COCKPIT TEMP HOT. TEMPERATURE CONTROLLED I (N1013A) - [SDR UIEA2021101902249](https://openairdocs.org/sdr/UIEA2021101902249), Oct 18, 2021: Boeing 767375. SENSOR. NONE. L PACK TEMP CAUITON MSG COMPLIED WITH QRH L TEMP CONTROLLER WORKS IN STANDBY MODE.(

R&R CABIN AIR SENSOR ASSY IAW (N1709A) - [SDR UIEA2021101802245](https://openairdocs.org/sdr/UIEA2021101802245), Oct 15, 2021: Boeing 767328. NONE. NONE. WITH THE FLT DECK TEMPERATURE CONTROL IN AUTO THE TEMPERATURE VARIES WILDLY WITH NO PILOT INPUT. TEMPERATURE OSCILLATES (N1499A) - [SDR P5CA2021101500389](https://openairdocs.org/sdr/P5CA2021101500389), Oct 14, 2021: Boeing 7673JHF. NONE. NONE. FWD CARGO BACKUP EICAS ON FINAL APPROACH.(

PERFORMED T/S PER FIM 21-61 FAULT TREE 804 REV 134. MSG CLEARED. OPS CHECK (N643GT) - [SDR UIEA2021100402180](https://openairdocs.org/sdr/UIEA2021100402180), Oct 2, 2021: Boeing 76731K. NONE. NONE. AFT CABIN TEMP ADVISORY MSG DISPLAYED IN FLIGHT.(

PERFORMED BITE ON ZONE TEMP CONTROLLER REF FIM 21-61 FT 803, NO FAUL (N1487A) - [SDR UIEA2021100202162](https://openairdocs.org/sdr/UIEA2021100202162), Oct 2, 2021: Boeing 76731K. CONTROLLER. FAULT MESSAGE. AFT CABIN TEMP CAUTION MSG IN FLIGHT @FL390 CABIN ALT 7000 CABIN DIFFERENTIAL PRESS 8.4 PSI. T/S IAW FIM 21-61 FAULT TRE (N1487A) - [SDR UIEA2021100102158](https://openairdocs.org/sdr/UIEA2021100102158), Sep 30, 2021: Boeing 76731K. CONTROL PANEL. WARNING MESSAGE. "AFT CABIN TEMP" EICAS MESSAGE OBSERVED IN FLIGHT.(

PERF BITE OF ZONE CONTROL PANEL IAW AMM 21-61-03. NO CURRENT FAULT (N1487A) - [SDR UIEA2021093002148](https://openairdocs.org/sdr/UIEA2021093002148), Sep 30, 2021: Boeing 76731K. CONTROLLER. FALSE INDICATION. DURING CRUISE, AFT CABIN TEMP MESSAGE PERFORMED BITE CHECK OF ZONE TEMP CONTROLLER IAW FIM 21-61 FT 803. NO DEFECTS NOTE (N1487A) - [SDR UIEA2021093002146](https://openairdocs.org/sdr/UIEA2021093002146), Sep 29, 2021: Boeing 76736N. VALVE. ILLUMINATED. AFT CABIN TEMP EICAS MSG PERFORMED FIM TASK 21-60 FT 803. FOUND AFT ZONE TRIM VALVE ILLUMINATED. REMOVED AND REPLACED TR (N1093A) - [SDR UIEA2021020200192](https://openairdocs.org/sdr/UIEA2021020200192), Feb 1, 2021: Boeing 76731K. CONTROLLER. INOPERATIVE. FORWARD CABIN TEMP INOPERATIVE. CABIN COMPT TEMP CONTROL SYSTEM, ALL CARGO CONFIGURATION. TRANSFERRED TO MDDR 141789 PER (N1487A) - [SDR I5PA2021020188802](https://openairdocs.org/sdr/I5PA2021020188802), Feb 1, 2021: Boeing 757230. MODULATING VALVE. FAULTY. DISCREPANCY FLT DECK COMP TEMP CONTROL INOPERATIVE. CORRECTIVE ACTION R & R FLT DECK TRIM AIR MODULATING VALVE IAW AMM 2 (N888LT) - [SDR ASAA2021012933974](https://openairdocs.org/sdr/ASAA2021012933974), Jan 29, 2021: Boeing 737990ER. CONTROLLER. INOPERATIVE. CONT CABIN ZONE TEMP LT ILLUM ON PUSH BACK. GROUNDED - YES. RELEASED PER MEL 21-21G. FLIGHT DECK PRIMARY TEMP CONTROL IN (N453AS) - [SDR ASAA2021012833972](https://openairdocs.org/sdr/ASAA2021012833972), Jan 28, 2021: Boeing 737990ER. CONTROLLER. FAULT MESSAGE. AFTER ENGINE START CONTROL CABIN ZONE AMBER ON, DOES RESET WITH MASTER CAUTION. GROUNDED - YES. INTERROGATED PACK CONTRO (N464AS) - [SDR UIEA2020060501210](https://openairdocs.org/sdr/UIEA2020060501210), Jun 4, 2020: Boeing 767328. FILTER. DIRTY. RIGHT PACK ALONE IS UNABLE TO ADEQUATELY COOL THE COCKPIT DURING FLIGHT. HIGHEST RECORDED COCKPIT TEMP WAS 36 DEG C. CLE (N1499A) All 308: https://openairdocs.org/jasc/2161/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 (15,352 reports) - [JASC 2121](https://openairdocs.org/jasc/2121): Air Distribution Fan (4,373 reports) - [JASC 2130](https://openairdocs.org/jasc/2130): Cabin Pressure Control System (3,453 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 (12,383 reports) - [JASC 2160](https://openairdocs.org/jasc/2160): Cabin Temperature Control System (3,039 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.