# JASC 2134: Cabin Pressure Sensor

- Type: JASC system/component code (FAA)
- ATA chapter: 21 Air Conditioning
- Title in the code table: CABIN PRESSURE SENSOR
- Service difficulty reports: 40
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=16
- Page: https://openairdocs.org/jasc/2134

## What it covers

The units and systems, which measure differential, pressure and transmit a signal. Typical parts are pressure switch, transducer, etc.

## Service difficulty reports (40)

- [SDR AALA202607077246](https://openairdocs.org/sdr/AALA202607077246), Jul 3, 2026: Boeing 737823. SENSOR. FAULTED. AIRCRAFT WAS GROUNDED: AIRCRAFT PRESSURIZATION ISSUE. CABIN ALTITUDE WAS STUCK AT 0 DURING CLIMB TO 10000 FT. HAD NO CAB (N996NN)
- [SDR 7C7A2022042600016](https://openairdocs.org/sdr/7C7A2022042600016), Apr 4, 2022: Dhav DHC8106. NONE. INTERMITTENT. DE-ICE PRESS LIGHT ILLUMINATED DE-ICE BOOTS CEASED OPERATION REMOVED AND REPLACED DE-ICE PRESS CAUTION LT. PRESSURE SWIT (N880EA)
- [SDR DALA2018012200356](https://openairdocs.org/sdr/DALA2018012200356), Jan 16, 2018: Doug MD9030. PRESSURE SWITCH. CONTAMINATED. PERFORMED AN AIR TURN BACK TO MSP DUE TO PRESSURIZATION ISSUES. ON CLIMB OUT, BELOW 8000 FEET, FLOW LIGHT ILLUMINATED. C (N905DA)
- [SDR 2017FA0000480](https://openairdocs.org/sdr/2017FA0000480), Sep 7, 2017: Diamon DA40. PRESSURE SWITCH. FAILED. PRESSURE SWITCH FAILED THAT CONTROLS THE HOBBS METER AND THE FAILURE ALLOWED OIL TO FLOW OUT OF THE ENGINE. THE PROBLEM  (N420FP)
- [SDR WX0A2015010772333](https://openairdocs.org/sdr/WX0A2015010772333), Jan 6, 2015: Doug DC983. WARNING SYSTEM. ACTIVATED. CABIN ALT WARNING ANNUNCIATOR COME ON DURING CLIMB THROUGH 12000 FEET. WE DECLARED AN EMER & RETURNED. QRH PROCEDURES WE (N873GA)
- [SDR WX0A072334](https://openairdocs.org/sdr/WX0A072334), Jan 4, 2015: Doug DC983. SENSOR. MALFUNCTIONED. AT FL 320, AFTER LEVEL OFF, RIGHT PACK PRESS DROPPED TO 0. COMPLIED WITH QRH 21-5. CABIN ALTITUDE CONTINUED TO CLIMB, DU (N869GA)
- [SDR AALA20120923011](https://openairdocs.org/sdr/AALA20120923011), Sep 23, 2012: Doug DC983. SENSE LINE. LOOSE. ORD - CREW REPORTED UNABLE TO PRESSURIZE AIRCRAFT AFTER TAKEOFF. THE OUTFLOW VALVE WAS CLOSED AND LEFT PACK SHOWED 50 ON (N9627R)
- [SDR USAA20101217BB091](https://openairdocs.org/sdr/USAA20101217BB091), Dec 16, 2010: Boeing 75723N. WARNING SWITCH. MALFUNCTIONED. FLL FLT 921 EN-ROUTE AUA TO PHL. DURING CRUISE, THE COCKPIT CREW OBSERVED A CABIN ALTITUDE WARNING. THE FLIGHT DESCENDED (N205UW)
- [SDR AALA2009032600002](https://openairdocs.org/sdr/AALA2009032600002), Mar 26, 2009: Doug DC982. SWITCH. INOPERATIVE. BNA - INFLIGHT DFW-LGA. CREW REPORTED PRESSURIZATION LOSS. MASKS DID NOT DEPLOY. EMERGENCY DECLARED, LANDED BNA WITHOUT  (N7549A)
- [SDR AALA200802237](https://openairdocs.org/sdr/AALA200802237), Aug 28, 2008: Doug DC983. PRESSURE SWITCH. INOPERATIVE. LAX INFLIGHT T1960/28AUG. BOTH AIR CON PACKS WENT TO ZERO FLOW ON CLIMB. ACFT WOULD NOT PRESSURIZE. RETURNED TO LAX AND  (N593AA)
- [SDR 2008FA0000053](https://openairdocs.org/sdr/2008FA0000053), Jan 17, 2008: Lear 35A. PRESSURE SENSOR. MALFUNCTIONED. LOSS OF CABIN PRESSURE AT 25K FT. PRESSURE SENSOR MALFUNCTIONED (N55FN)
- [SDR CA070530006](https://openairdocs.org/sdr/CA070530006), May 30, 2007: Boeing 727225. WARNING SYSTEM. ACTIVATED. (CAN) AFTER DEPARTURE, WHEN AT 13,000 FEET ALT WARNING HORN SOUNDED AND COULD NOT BE SILENCED WITH THE HORN CUTOUT. CREW
- [SDR AWXA200700685](https://openairdocs.org/sdr/AWXA200700685), May 20, 2007: Airbus A319132. VALVE. FAILED. PHL - CREW REPORTED, DURING CLIMB TO F250 PACK 2 TRIPPED. TEMP 32 DEG C ZONE OUTPUT 92 DEG F, PACK FLOW STAYED IN THE LO (N812AW)
- [SDR BSAASDR0709](https://openairdocs.org/sdr/BSAASDR0709), Apr 27, 2007: Beech 1900D. PRESSURE SWITCH. SHORTED. DURING CLIMB, BOTH ENVIR FAIL LIGHTS CAME ON, CREW RETURNED TO STATION WITH NO FURTHER INCIDENT. LEFT SYSTEM WAS INITIAL (N3199Q)
- [SDR 105102006TB](https://openairdocs.org/sdr/105102006TB), Oct 11, 2006: Bolkms BO105LSA3. PRESSURE SWITCH. INOPERATIVE. THE EMS FLIGHT WAS EN ROUTE TO HOME BASE IN REDDING, CALIFORNIA, AFTER A CANCELLED SCENE CALL 20 MILES TO THE NORTHEAST. (N31RX)
- [SDR XN0A1250](https://openairdocs.org/sdr/XN0A1250), Aug 2, 2005: Airbus A300B4203. WARNING LIGHT. MALFUNCTIONED. ON TAXI, GROUND AUX VALVE FAULT LIGHT REMAINED ON. DMI GROUND AUX LIGHT REF MEL 21-34-05 AND DMI 5606 CAT "C". PLACARDS  (N224KW)
- [SDR 0500669601](https://openairdocs.org/sdr/0500669601), Apr 30, 2005: Doug DC932. LINE. KINKED. AT FL340, CREW NOTICED THE CABIN ALTITUDE CLIMBING THROUGH 10,000 FEET. A RAPID DESCENT WAS INITIATED AND COMPLIED WITH  (N601NW)
- [SDR CA041012007](https://openairdocs.org/sdr/CA041012007), Oct 8, 2004: Dhav DHC8201. PRESSURE SWITCH. OUT OF TOLERANCE. (CAN) CABIN ALTITUDE CLIMBED DURING DESCENT WITH LOW ENGINE POWER SELECTED. CABIN ALTITUDE WARNING (CABIN PRESS) LIGHT I
- [SDR 0039](https://openairdocs.org/sdr/0039), Jun 22, 2004: Lear 35A. PRESSURE SWITCH. OUT OF LIMITS. DURING A 2400 HOUR INSPECTION, THE ABSOLUTE PRESSURE WARNING SWITCH FOR THE PRESS CONTROLLER WAS FOUND TO BE DEFECTIVE.  (N222BE)
- [SDR 0038](https://openairdocs.org/sdr/0038), Jun 22, 2004: Lear 35A. PRESSURE SWITCH. OUT OF LIMITS. DURING A 2400 HOUR INSPECTION, THE ABSOLUTE PRESSURE WARNING SWITCH FOR THE PRESS CONTROLLER WAS FOUND TO BE DEFECTIVE.  (N222BE)
- [SDR 0037](https://openairdocs.org/sdr/0037), Jun 22, 2004: Lear 35A. PRESSURE SWITCH. OUT OF LIMITS. DURING A 2400 HOUR INSPECTION, THE ABSOLUTE PRESSURE WARNING SWITCH FOR THE PRESS CONTROLLER WAS FOUND TO BE DEFECTIVE.  (N222BE)
- [SDR 0036](https://openairdocs.org/sdr/0036), Jun 22, 2004: Lear 35A. PRESSURE SWITCH. OUT OF LIMITS. DURING A 2400 HOUR INSPECTION, THE ABSOLUTE PRESSURE WARNING SWITCH FOR THE PRESS CONTROLLER WAS FOUND TO BE DEFECTIVE.  (N222BE)
- [SDR 0035](https://openairdocs.org/sdr/0035), Jun 22, 2004: Lear 35A. PRESSURE SWITCH. OUT OF LIMITS. DURING A 2400 HOUR INSPECTION, THE ABSOLUTE PRESSURE WARNING SWITCH FOR THE PRESS CONTROLLER WAS FOUND TO BE DEFECTIVE.  (N222BE)
- [SDR 0034](https://openairdocs.org/sdr/0034), Jun 22, 2004: Lear 35A. PRESSURE SWITCH. OUT OF LIMITS. DURING A 2400 HOUR INSPECTION THE ABSOLUTE PRESSURE WARNING SWITCH FOR THE PRESSURIZATION CONTROLLER WAS FOUND TO BE DEF (N222BE)
- [SDR 0032](https://openairdocs.org/sdr/0032), Jun 20, 2004: Lear 35A. PRESSURE SWITCH. OUT OF LIMITS. DURING PERFORMANCE OF A 2400 HOUR INSPECTION THE ABSOLUTE PRESSURE SWITCH FOR THE AURAL WARNING ON THE PRESSURIZATION SY (N222BE)
- [SDR ARWA20030703](https://openairdocs.org/sdr/ARWA20030703), Jul 8, 2003: Doug DC863. LINE. BROKEN. ON CLIMB OUT HEARD LOUD NOISE AND CABIN CLIMBED, UNABLE TO MAINTAIN CABIN PRESSURE. ENTERED ON DMI NR 17926 IAW MEL 21-6 (N345JW)
- [SDR GLBA2002114](https://openairdocs.org/sdr/GLBA2002114), Jul 31, 2002: Beech 1900D. PRESSURE SWITCH. FAILED. LEFT ENVIROMENTAL FAIL ON CLIMB-OUT, REMOVED AND REPLACE PRESSURE SWITCH OPS CHECK GOOD (N226GL)
- [SDR C2XA01TY116](https://openairdocs.org/sdr/C2XA01TY116), Sep 18, 2001: Emb EMB145LR. SWITCH. FAILED. TYS DURING A SCHEDULED INSPECTION, THE ALTITUDE SENSING SWITCH FOR PASSENGER OXYGEN FAILED OPS CHECK. MAINTENANCE REMOVE (N13989)
- [SDR RAIA00107014](https://openairdocs.org/sdr/RAIA00107014), Jul 17, 2001: Aerosp ATR72202. SWITCH. FAILED. 7166-STL-RIGHT BLEED FAULT CAPTION ILLUMINATED DURING CLIMB, AIRCRAFT RETURNED FROM FLIGHT WITHOUT INCEDENT. MAINTENANCE (N723TE)
- [SDR GLBA2001056](https://openairdocs.org/sdr/GLBA2001056), Mar 7, 2001: Beech 1900D. PRESSURE SWITCH. FAILED. ABORTED T/O - RIGHT ENVIROMENTAL FAILURE. REPLACED PRESSURE SWITCH, OPS CHECKED SYSTEM GOOD. (N219GL)
- [SDR CA000809012](https://openairdocs.org/sdr/CA000809012), Jul 24, 2000: Beech B200C. TUBE. SPLIT. (CAN) DURING CLIMB CREW OBSERVED A RT BLEED AIR LIGHT. WHEN RT BLEED AIR SWITCHED OFF, LT BLEED WOULD NOT HOLD CABIN PRE
- [SDR CA000801033](https://openairdocs.org/sdr/CA000801033), Jul 17, 2000: Lear 25B. PRESSURE SWITCH. FAILED. (CAN) A/C EXCEDED MAX ALT DUE TO UPDRAFT, A/C PRESSURIZATION SYSTEM ANORIDE SWITCH OPERATED TO SPEC UPON DESCNET SYSTEM 
- [SDR RAIA0004016](https://openairdocs.org/sdr/RAIA0004016), Apr 15, 2000: Bag JETSTM3201. CONNECTOR. FAILED. 7356-STL-AIR, OFF CAPTION ILLUMINATED FOR LEFT AIR CONDITIONING PACK. MAINTENANCE INSPECTED AND DEFERRED PER MEL. MAINTE (N426AM)
- [SDR TWAA9917002](https://openairdocs.org/sdr/TWAA9917002), Dec 15, 1999: Doug DC982. LINE. LOOSE. CRUISING AT FL310 CABIN PRESSURIZATION WAS LOST. PASSENGER OXYGEN MASKS DEPLOYED. MADE AN UNSCHEDULED LANDING AT RNO. TI (N917TW)
- [SDR 99ZZZX3662](https://openairdocs.org/sdr/99ZZZX3662), Aug 26, 1999: Gulstm G1159A. INLET COUPLING. FAILED. DURING CLIMB-OUT, CREW NOTICED THE CABIN WAS NOT PRESSURIZING (CABIN WAS CLIMBING WITH AIRCRAFT). THE AIRCRAFT THEN RETU (N700SB)
- [SDR SCNA99509](https://openairdocs.org/sdr/SCNA99509), May 10, 1999: Doug DC1015. SWITCH. FAILED. DURING A HEAVY MAINTENANCE VISIT, DURING COMPLETION OF A CABIN LEAK CHECK THE ALTITUDE WARNING HORN FAILED TO GO OFF WHE (N154SY)
- [SDR 98ZZZM772](https://openairdocs.org/sdr/98ZZZM772), Mar 30, 1998: Gulstm G1159B. TRANSDUCER. MALFUNCTIONED. LOST CABIN PRESSURIZATION CONTROL AT 37,000 FT, WENT TO MANUAL AND COULD NOT CONTROL. MADE EMERGENCY DESCENT TO 10,000 F (N36PN)
- [SDR USAASB97128](https://openairdocs.org/sdr/USAASB97128), May 12, 1997: Boeing 737301. SENSOR. MALFUNCTIONED. CLT - FLT 1594, DURING CRUISE FL350, THE CABIN ALT WARNING HORN WENT OFF AT 10,000 FT CABIN ALT. ALL SYS'S APPEARED TO B (N342US)
- [SDR SWAA960853](https://openairdocs.org/sdr/SWAA960853), Aug 21, 1996: Boeing 7372H4. SENSOR. INOPERATIVE. AIRCRAFT RETURNED TO DAL DUE TO RIGHT PACK TRIPPING AND UNABLE TO CONTROL CABIN PRESSURE. REMOVED AND REPLACED 450 DEGRE (N51SW)
- [SDR 95ZZZW95](https://openairdocs.org/sdr/95ZZZW95), Jan 13, 1995: Doug DC932. PRESS SENSOR. FAILED. ON CLIMB-OUT, PRESSURIZATION UNCONTROLLABLE IN AUTO AND MANUAL. AUTO PILOT PREVIOUSLY ON MEL. FLIGHT RETURNED TO ATL. RE (N1269L)

## 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 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 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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