# JASC 2110: Cabin Compressor System

- Type: JASC system/component code (FAA)
- ATA chapter: 21 Air Conditioning
- Title in the code table: CABIN COMPRESSOR SYSTEM
- Service difficulty reports: 252
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=15
- Page: https://openairdocs.org/jasc/2110

## What it covers

The system and its controls supplying compressed air to the cabin. For reported problems with the compressor unit and not the associated system. Related entries should include the component manufacturer's make, model, and the specific defective part by name and part number. Typical parts are controls and indicating systems related to the compressors, wiring, etc.

## Service difficulty reports (252, newest 50)

- [SDR DALA2026032401988](https://openairdocs.org/sdr/DALA2026032401988), Mar 23, 2026: Boeing 757232. COMPRESSOR. INOPERATIVE. ROW 16-17-18, SMELL ELECTRICAL FUME ODER. (NO PACK, AIRFLOW IN THAT SECTION) L-PACK MEL, R-PACK OK. DUCT PRESSURE VIA AP (N651DL)
- [SDR 3EJA202603250004](https://openairdocs.org/sdr/3EJA202603250004), Feb 15, 2026: Cessna 560XL. ACM. FALSE INDICATION. DURING TAKEOFF AT 100 FEET ACM OVERHEAT LIGHT ILLUMINATED ALONG WITH AN ODOR OF PLASTIC MELTING. TROUBLE SHOT AND COULD  (N801JS)
- [SDR 2025FA0000722](https://openairdocs.org/sdr/2025FA0000722), Oct 15, 2025: Cirrus SR20. COMPRESSOR. CRACKED. AC COMPRESSOR CRACKS THAT WE ARE CURRENTLY ENCOUNTERING ACROSS OUR FLEET. THESE CRACKS PRESENT A POTENTIAL FAULT THAT RA
- [SDR G1IA20250625093](https://openairdocs.org/sdr/G1IA20250625093), Jun 25, 2025: Beech C90A. MOTOR. FAULTED. DURING OUR CLIMB, PILOT NOTED THAT THE AIR CONDITIONING HAD NOT ACTIVATED AT ALL. (N400EM)
- [SDR CALA2025062505872](https://openairdocs.org/sdr/CALA2025062505872), Jun 23, 2025: Boeing 7879. ACTUATOR. FAULTED. CPRSR DEFLECTOR DOOR L LEFT CABIN AIR COMPRESSOR AIR INLET DOOR NOT IN COMMANDED POSITI ON OR LOSS OF POSITION FEEBACK.D (N29975)
- [SDR 2025FA0000414](https://openairdocs.org/sdr/2025FA0000414), Jun 20, 2025: Cessna 525B. MOTOR. FIRE. AIRCRAFT START UP INITIATED AND ONCE TAXI BEGAN, CREW HAD THE BAGGAGE SMOKE CAS MESSAGE ON THE DISPLAY. AIRCRAFT WAS STO (N149WW)
- [SDR CALA2025051404669](https://openairdocs.org/sdr/CALA2025051404669), May 12, 2025: Boeing 7878. COMPRESSOR. FAULTED. CABIN AIR COMPRESSOR L2 CABIN AIR COMPRESSOR L2 HAS FAILED OR HAS A FAULT, IS UNAVAILABL E, OR HAS BEEN SELECTED OFF. FI (N26909)
- [SDR G1IA20250125081](https://openairdocs.org/sdr/G1IA20250125081), Jan 25, 2025: Beech C90A. MOTOR. SHORTED. AIR CONDITIONER WILL NOT TURN ON. REPLACED A/C COMPRESSOR DRIVE MOTOR WITH O/H MOTOR OP CHECK GOOD (N1068K)
- [SDR G1IA20250124080](https://openairdocs.org/sdr/G1IA20250124080), Jan 24, 2025: Beech C90A. MOTOR. SHORTED. AIR CONDITIONER INOP (N299RP)
- [SDR G1IA20250106079](https://openairdocs.org/sdr/G1IA20250106079), Jan 6, 2025: Beech C90A. MOTOR. INOPERATIVE. ENROUTE FROM KOA TO HNL THE AIR CONDITIONING FAILED. (N299RP)
- [SDR VGCA20241209001](https://openairdocs.org/sdr/VGCA20241209001), Dec 9, 2024: Cvac STC3405800. CHECK VALVE. BLOCKED. ON LANDING SMOKE FILLED CABIN AND COCKPIT. DURING SUBSEQUENT INSPECTION FOUND THAT ENGINE DRIVEN COMPRESSOR (CABIN) HAD  (N351FL)
- [SDR QMLA2024012620007](https://openairdocs.org/sdr/QMLA2024012620007), Jan 26, 2024: Urocop EC130B4. COMPRESSOR. SEIZED. IN ROUTE WITH PATIENT TO RECEIVING HOSPITAL, CRUISE FLIGHT. CREW NOTICED A STRONG ODOR OF WHAT SMELLED LIKE BURNING ELEC (N325AM)
- [SDR 9JLA2023042039077](https://openairdocs.org/sdr/9JLA2023042039077), Apr 19, 2023: Gulstm G150. UNKNOWN. UNKNOWN. THE FLIGHT CREW REPORTED THEY EXPERIENCED A CABIN OVERPRESSUREIZATION OF 9.0 PSI AT CRUISING ALTITUDE OF FL400. THEY IND (N530LD)
- [SDR 2022F00437](https://openairdocs.org/sdr/2022F00437), Oct 30, 2022: Cessna 208B. COMPRESSOR. SEIZED. SMOKE IN COCKPIT. UPON LANDING MAINTENANCE DISCOVER AC COMPRESSOR SEIZED AND DRIVE BELT HAD MELTED (N549PN)
- [SDR 9JLA2022101232269](https://openairdocs.org/sdr/9JLA2022101232269), Oct 6, 2022: Lear 60LEAR. MOTOR. INOPERATIVE. THE FLIGHT CREW REPORTED THAT DURING THE POSTFLIGHT IT WAS DISCOVERED THE FREON AIR CONDITIONING SYSTEM WAS INOP. THE AI (N358F)
- [SDR SIMA20221001001](https://openairdocs.org/sdr/SIMA20221001001), Oct 1, 2022: Emb EMB145LR. NONE. NONE. PACK 1 AND 2 CLOSED ON EICAS / EMERGENCY NOT DECLARED A/C SWAP. FLIGHT CONTINUED. -C/A-PACK LEAKS FOUND ON PACK 1 AND PA (N664MS)
- [SDR DXTA2022092971290](https://openairdocs.org/sdr/DXTA2022092971290), Sep 28, 2022: Emb EMB505. MODULE. DEFECTIVE. CARGO SMOKE RED CAS, WHEN PARKING ON THE RAMP WE GOT A RED BAG SMK CAS MESSAGE. WHEN WE EXITED THE AIRCRAFT THERE WAS SM (N438QS)
- [SDR YENA2022082200810](https://openairdocs.org/sdr/YENA2022082200810), Aug 19, 2022: Airbus A320232. A/C PACK. ODOR. FLT#194, STI-EWR.' ON DESCENT BELOW 1000FT DIRTY SOCK SMELL, TURNED OFF PACK #1 AND THE SMELL DISSIPATED; COMPLIED WITH  (N746JB)
- [SDR K11A2022072500147](https://openairdocs.org/sdr/K11A2022072500147), Jul 23, 2022: Boeing 727264. PRESSURE SYSTEM. FAILED. RIGHT PACK FAILED DURING CLIMBOUT - UNABLE TO PRESSURIZE. PERFORMED OPS CHECK OF COOLING PACKS IAW B727 AMM 21-55-00 OPS (N729CK)
- [SDR 2022FA0000273](https://openairdocs.org/sdr/2022FA0000273), Jun 2, 2022: Urocop AS365N3. NONE. NONE. DURING TAKEOFF THE CABIN EXPERIENCED A RUBBER BURNING SMELL, THE AIRCRAFT RETURNED TO BASE, SHUTDOWN WITHOUT FURTHER INC (N464RM)
- [SDR 2022FA0000259](https://openairdocs.org/sdr/2022FA0000259), May 12, 2022: Snias AS350B3. NONE. NONE. DURING TAKEOFF THE CABIN EXPERIENCED RUBBER BURNING SMELL, THE AIRCRAFT RETURNED TO BASE, SHUT DOWN WITHOUT EVENT. TROUB (N464RM)
- [SDR 2022FA0000241](https://openairdocs.org/sdr/2022FA0000241), Apr 28, 2022: Cessna 208B. COMPRESSOR. SEIZED. ON CLIMB OUT, THE AIR CONDITIONER COMPRESSOR FAILED CAUSING THE DRIVE BELT TO BREAK. CREW NOTICED A BURNING ODOR AND TUR (N808MA)
- [SDR 9JLA2021100623873](https://openairdocs.org/sdr/9JLA2021100623873), Sep 19, 2021: Beech 400A. MOTOR. DEFECTIVE. THE FLIGHT CREW REPORTED THE FREON COMPRESSOR CIRCUIT BREAKER TRIPPED TWICE. THE CORRECTIVE ACTION WAS DEFERRED PER MEL  (N215JL)
- [SDR DXTA2021081847130](https://openairdocs.org/sdr/DXTA2021081847130), Aug 17, 2021: Emb EMB505. DRIVE ASSY. LEAKING. LIGHT HAZE AND ELECTRICAL ODOR FILLED CABIN. VCS SYSTEM CUTOFF. VCS SYNOPSIS PAGE DISPLAYS YELLOW X ON VCS. RECOVERED RE (N431QS)
- [SDR QR9R20210802001](https://openairdocs.org/sdr/QR9R20210802001), Aug 2, 2021: Bolkms BK117C2. COMPRESSOR. SEIZED. DURING POST FLIGHT INSPECTION, FOUND AIR CONDITIONING COMPRESSOR DRIVE BELT BROKEN DUE TO COMPRESSOR LOCKING UP. BORESCO (N799AE)
- [SDR 4HYA2021072603](https://openairdocs.org/sdr/4HYA2021072603), Jul 26, 2021: Snias AS350B3. COMPRESSOR. SMOKE. IN CRUISE NOTICED SMOKE IN CABIN WITH PLASTIC SMELL. MAINTENANCE DISCOVERED AIR CONDITIONER COMPRESSOR TO BE SOURCE. (N545HF)
- [SDR GTIA2021050335711](https://openairdocs.org/sdr/GTIA2021050335711), May 3, 2021: Airbus A320232. COMPRESSOR. HOT. CRUISING AT FL350 FLIGHT ATTENDANT REPORTED STRONG SMOKE SMELL (NON-VISABLE) SHORTLY AFTER CAPT AND FO SMELLED SAME ODOR (N627NK)
- [SDR VE7A2020081700001](https://openairdocs.org/sdr/VE7A2020081700001), Aug 11, 2020: Bolkms BK117C2. COMPRESSOR. SLIPPED. CREW ABORTED FLIGHT DUE TO SMELL COMING FROM AIR CONDITIONING VENTS. NO CAUTION/WARNING MESSAGES GIVEN. FOUND COMPRESSOR (N745TX)
- [SDR CA190726022](https://openairdocs.org/sdr/CA190726022), Jul 25, 2019: Dhav DHC8102. ACM. SEIZED. (CAN) THE CREW MADE A GATE RETURN AS CABIN TEMP COULD NOT BE CONTROLLED IN MANUAL OR AUTO MODE. AFTER A SYSTEM RESET AND
- [SDR CA190630001](https://openairdocs.org/sdr/CA190630001), Jun 24, 2019: Cndair CL6002B19. SHUTOFF VALVE. FAULTY. (CAN) R PACK HIGH TEMP PASSING THROUGH 13,000FT. QRH CLEARED. MESSAGE RETURNED APPROX 5 MIN LATER AND WAS CLEARED AGAIN.
- [SDR AALA201810259007](https://openairdocs.org/sdr/AALA201810259007), Oct 22, 2018: Boeing 7878. COMPRESSOR. FAULTED. DURING CRUISE AT 38,000 FEET, .84M, 270 KIAS, CABIN AIR COMPRESSOR R2 STATUS MESSAGE APPEARED. FLIGHT CREW NOTICED A TEM (N800AN)
- [SDR CA180925008](https://openairdocs.org/sdr/CA180925008), Sep 21, 2018: Bombdr BD7001A10. COMPRESSOR. MALFUNCTIONED. (CAN) DURING A CHECK-FLIGHT, POST 15 YEARS CHECK AT MAINTENANCE FACILITY (2 MONTHS DOWNTIME), CREW NOTICED DURING TAKE-O
- [SDR CA180808026](https://openairdocs.org/sdr/CA180808026), Jul 29, 2018: Beech B200GT. COMPRESSOR. LEAKING. (CAN) AIR CONDITIONING COMPRESSOR WEEPING OIL FROM AFT SEAL. ADDITIONAL AIRCRAFT IN THE COMPANY FLEET HAVE ENCOUNTERED T
- [SDR CA180808025](https://openairdocs.org/sdr/CA180808025), Jul 25, 2018: Beech B300C. COMPRESSOR. FAILED. (CAN) AIR CONDITIONING COMPRESSOR P/N 201-0450-3 FAILURE, 73.5 HRS FROM INSTALLATION. DEFECT REPORTED: `AIR CONDITIONING
- [SDR CA180808024](https://openairdocs.org/sdr/CA180808024), Jun 27, 2018: Beech B300C. COMPRESSOR. FAILED. (CAN) AIR CONDITIONING COMPRESSOR P/N 201-0450-3 FAILURE, 15.7 HRS FROM INSTALLATION. DEFECT REPORTED: `AIR CONDITIONING
- [SDR CA180808023](https://openairdocs.org/sdr/CA180808023), Jun 5, 2018: Beech B300C. COMPRESSOR. FAILED. (CAN) AIR CONDITIONING COMPRESSOR P/N 201-0450-3 FAILURE ON AN AIRCRAFT WITH UNDER 400 HRS FROM NEW. DEFECT REPORTED: `A
- [SDR HDNA1007201600001](https://openairdocs.org/sdr/HDNA1007201600001), Oct 7, 2016: Bolkms BK117C2. MOUNT. CRACKED. DURING DAILY INSPECTION, FOUND AIR CONDITIONER COMPRESSOR MOUNT CRACKED. REPLACED WITH NEW . (N194LL)
- [SDR QMLA2016092016106](https://openairdocs.org/sdr/QMLA2016092016106), Sep 20, 2016: Snias AS350B3. HOSE. CRACKED. ENROUTE THE CREW NOTICE SMOKE IN CABIN AREA PILOT FOLLOWED EMERGENCY PROCEDURES OPENED FRESH AIR VENTS AND WINDOWS NOTIF (N439AE)
- [SDR 9JLA201611187890](https://openairdocs.org/sdr/9JLA201611187890), Sep 14, 2016: Beech 400A. MOTOR. OVERHEATED. CREW REPORTED AFTER THE AIRCRAFT WAS SHUT DOWN AND OPENING THE BAGGAGE DOOR, THE PILOT NOTED PRESENTS OF SMOKE IN THE TA (N345HC)
- [SDR QMLA2016071316078](https://openairdocs.org/sdr/QMLA2016071316078), Jul 13, 2016: Snias AS350B3. CLUTCH. FAILED. SHORTLY AFTER TAKE-OFF, CREW SMELLED AN ODOR IN THE AIRCRAFT. SUSPECTED THE AIR CONDITIONING SYSTEM SINCE THE SAME HAD H (N913SM)
- [SDR 17GR2016010900001](https://openairdocs.org/sdr/17GR2016010900001), Jan 9, 2016: Cessna 560CESSNA. MOTOR. FAULTED. AC COMPRESSOR MOTOR WOULD NOT RUN. FOUND CURRENT LIMITER BLOWN. ON INSPECTION, FOUND BRUSHES WERE NOT SEATING. SPRINGS W (N999CB)
- [SDR AALA20150501014](https://openairdocs.org/sdr/AALA20150501014), May 1, 2015: Boeing 737823. SENSOR. FAULTY. DURING CLIMB THE RIGHT PACK BLEED FAULTED AND WOULDN"T RESET. EMERGENCY DECLARED AND FLIGHT LANDED WITHOUT INCIDENT. REM (N904AN)
- [SDR 2015FA0000122](https://openairdocs.org/sdr/2015FA0000122), Apr 6, 2015: Snias AS350B2. COMPRESSOR. LOCKED. A/C BELT FOUND MELTED AND BROKEN DUE TO A/C COMPRESSOR LOCK UP. HEAT GENERATED ON PULLEY CAUSED REJECTION OF THE PULLEY  (N4068W)
- [SDR 2014FA0000253](https://openairdocs.org/sdr/2014FA0000253), Apr 4, 2014: Cessna 208. COMPRESSOR. SEIZED. ODOR DETECTED RESEMBLING BURNING RUBBER AND / OR PLASTIC. AIR CONDITIONING COMPRESSOR SEIZED CAUSING DRIVE BELT TO BE DA (N366TA)
- [SDR ABXA20131009578](https://openairdocs.org/sdr/ABXA20131009578), Oct 4, 2013: Boeing 767338. COMPUTER. FAILED. ENROUTE, LEVEL AT FL350 CENTER AUTOPILOT SHORTLY THERE AFTER NOTED BRIEF ODOR OF SMOKE. DEFERRED, CLEARED 10/08/2013-PER (N364CM)
- [SDR 2013FA0000485](https://openairdocs.org/sdr/2013FA0000485), Aug 23, 2013: Piper PA28181. COMPRESSOR. LEAKING. HAVE EXPERIENCED MULTIPLE FAILURES/DEFECTS OF THE A/C SYSTEM. THE TYPES OF FAILURES ARE PRIMARILY COMPRESSOR SHAFT OIL L (N4402U)
- [SDR 2013FA0000486](https://openairdocs.org/sdr/2013FA0000486), Aug 8, 2013: Piper PA28181. CLUTCH. DEFECTIVE. THE A/C COMPRESSOR CLUTCH FAILS AND THEN LOCKS UP CAUSING A DESTROYED DRIVE BELT AND A/C SYS FAILURE. THESE SYS AR ON BR (N4401F)
- [SDR QMLA2013072513102](https://openairdocs.org/sdr/QMLA2013072513102), Jul 25, 2013: Snias AS350B3. COMPRESSOR. SEIZED. AIR CONDITIONER COMPRESSOR PULLEY BEARING AND CLUTCH OVERHEAT WITH PULLEY BEARING SEIZING. DURING TROUBLESHOOTING DETERM (N903CF)
- [SDR 2013FA0000442](https://openairdocs.org/sdr/2013FA0000442), Jun 30, 2013: Pilats PC1245. MOTOR. FAILED. DURING NORMAL OPERATION FLIGHT, THE FREON AIR CONDITIONER SYS SHUTDOWN. PILOT REPORTED WHEN, AFTER LANDING, THEY CHECKED (N6971Z)
- [SDR DXTA2013012905265](https://openairdocs.org/sdr/DXTA2013012905265), Jan 28, 2013: Cessna 750. COMPRESSOR. INOPERATIVE. COCKPIT PAC TEMPERATURE WAS UNCONTROLLABLE WHILE ON THE GROUND. COCKPIT FILLED WITH BLUEISH WHITE SMOKE BEFORE COCKPIT P (N921QS)

All 252: https://openairdocs.org/jasc/2110/reports.md

## Other codes in chapter 21

- [JASC 2100](https://openairdocs.org/jasc/2100): Air Conditioning System (1,354 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 2160](https://openairdocs.org/jasc/2160): Cabin Temperature Control System (3,040 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)

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