# JASC 2131: Cabin Pressure Controller

- Type: JASC system/component code (FAA)
- ATA chapter: 21 Air Conditioning
- Title in the code table: CABIN PRESSURE CONTROLLER
- Service difficulty reports: 2,041
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=16
- Page: https://openairdocs.org/jasc/2131

## What it covers

For the reports pertaining to the controller units only and not for the system. The defective part should be identified by the part name and part number whenever possible.

## Service difficulty reports (2,041, newest 50)

- [SDR IPXA2026101437503](https://openairdocs.org/sdr/IPXA2026101437503), Oct 14, 2026: Boeing 75724APF. CONTROLLER. FAULTED. CABIN ALTITUDE EICAS MSG AT FL300 ORDERED RIGHT PACK TEMP CONTROLLER. (N438UP)
- [SDR CALA2026100820232](https://openairdocs.org/sdr/CALA2026100820232), Oct 5, 2026: Boeing 737824. CONTROLLER. FAULTED. CABIN PRESSURE DIFF IS ABOVE LIMITS, DESCENDED FROM FL 390 TO 350. REMOVED AND REPLACED CPC NR 2 IAW AMM 21-31-01, OPS C (N77538)
- [SDR DALA2026100505503](https://openairdocs.org/sdr/DALA2026100505503), Oct 4, 2026: Airbus BD5001A10. CONTROLLER. FAULTED. ATB - TO SLC DUE TO A PRESSURIZATION ISSUE SHORTLY AFTER TAKEOFF. REMOVED & REPLACED NUMBER 1 IASC COMPUTER, OPS CHECK G (N118DU)
- [SDR DXTA2026100509995](https://openairdocs.org/sdr/DXTA2026100509995), Sep 30, 2026: Cessna 680A. CONTROLLER. FAULTED. RECEIVED BLD LEAK R AMBER CAS MESSAGE, RAN QRH, & TRIED TO EXIT ICING CONDS. AFTER, RECEIVED AMBER BLD LEAK L CAS MESS.  (N679QS)
- [SDR AALA202609248207](https://openairdocs.org/sdr/AALA202609248207), Sep 21, 2026: Boeing 737823. CONTROLLER. INOPERATIVE. AIRCRAFT WAS GROUNDED: AUTO PRESSURIZATION AND ALTERNATE FAIL IN FLIGHT. QRH ACCOMPLISHED. AS A PRECAUTION EMERGENCY DEC (N917AN)
- [SDR AALA202609245051](https://openairdocs.org/sdr/AALA202609245051), Sep 21, 2026: Boeing 737823. CONTROLLER. INOPERATIVE. AIRCRAFT WAS GROUNDED: AUTO PRESSURIZATION AND ALTERNATE FAIL IN FLIGHT. QRH ACCOMPLISHED. AS A PRECAUTION EMERGENCY DEC (N917AN)
- [SDR DALA2026091605158](https://openairdocs.org/sdr/DALA2026091605158), Sep 16, 2026: Airbus A320212. CONTROLLER. FAULTY. ATB - DUE TO CAB PR EXCESS CAB ALT ECAM WARNING FOLLOWED BY CAB PR SYS 2 FAULT. #2 CPC REPLACED. (LP: 9548118, AIRCRAFT  (N367NW)
- [SDR ABXA20260913404](https://openairdocs.org/sdr/ABXA20260913404), Sep 13, 2026: Boeing 767338. CONTROLLER. DEFECTIVE. WHILE CRUISING AT FL370 BETWEEN THE CALIFORNIA AND NEVADA BORDER, THE FO AND CAPT HEARD A BEEPING NOISE COMING FROM THE  (N362CM)
- [SDR DALA2026090905060](https://openairdocs.org/sdr/DALA2026090905060), Sep 9, 2026: Boeing 7379GPER. ACTUATOR. FAULTED. DIV/PRES/DE- DIVERTED TO LAS DUE TO LOSS OF CABIN PRESSURE. FOUND CLAMP ON APU DUCT BOOT IN KEEL BEAM DAMAGED CAUSING LA (N934DZ)
- [SDR I5PA2026090468814](https://openairdocs.org/sdr/I5PA2026090468814), Sep 4, 2026: Boeing 757230. CONTROLLER. MALFUNCTIONED. ETOPS SIGNIFICANT REPORT AND EVENT - LEFT PACK TEMP AND CABIN ALTITUDE EICAS MESSAGE. EMERGENCY DESCENT AND DIVERSION TO (N688SL)
- [SDR I5PA2026083068809](https://openairdocs.org/sdr/I5PA2026083068809), Aug 30, 2026: Boeing 757230. CONTROLLER. INOPERATIVE. ETOPS SIGNIFICANT REPORT, CABIN ALT AUTO 2 STATUS MESSAGE. REPLACED CABIN PRESSURE CONTROLLER 2 IAW AMM. (N688SL)
- [SDR IPXA2026082388187](https://openairdocs.org/sdr/IPXA2026082388187), Aug 23, 2026: Airbus A300F4622R. CONTROLLER. FAULTED. AIR TURN BACK, DURING CLIMB OUT CAB PRESSURE ECAM ADVISORY DISPLAY V/S AT 0. THEREAFTER ECAM CABIN PRESS REG 1 FAULT. FO (N154UP)
- [SDR YENA2026072000604](https://openairdocs.org/sdr/YENA2026072000604), Jul 19, 2026: Airbus A321271NX. CONTROLLER. FAULTED. FLT # 1023, JFK-LAX. (ETOPS) "CABIN PRESSURE SYSTEM 2 FAULT ( AUTOMATIC CABIN PRESSURE CONTROL SYSTEMS SYSTEM 2 (CPC 2)  (N2193J)
- [SDR HNAA2026071300592](https://openairdocs.org/sdr/HNAA2026071300592), Jul 10, 2026: Emb EMB145LR. CONTROLLER. FAULTED. PRESSURE CLIMBED CONTINUOUSLY IN FLT. PRESS CONTROL AUTO AND MANUAL. R & R DIGITAL RESSURE CONTROLLER IAW AMM 21-31-01 O (N695AE)
- [SDR YENA2026070700514](https://openairdocs.org/sdr/YENA2026070700514), Jul 1, 2026: Airbus A320232. CONTROLLER. FAILED. FLT# 1009, JFK-SDQ(EMERGENCY DECLARED AIR RETURN).CAB PR SYSTEM 1 FAULT WAS RESET AT GATE BY MX TECH. CAME BACK ON CLIMB (N661JB)
- [SDR 6CBA2026061126001](https://openairdocs.org/sdr/6CBA2026061126001), Jun 6, 2026: Pilats PC1247E. CONTROLLER. MALFUNCTIONED. CREW BEGAN DESCENT FROM FL230 AND AT AROUND FL200 HAD AN ACS LOW INFLOW CAS AND SAW THE CABIN ALTITUDE RISING. REQUESTED (N131AF)
- [SDR VNAA2026060518502](https://openairdocs.org/sdr/VNAA2026060518502), Jun 3, 2026: Cndair CL6002C10. CONTROLLER. FAULTED. AUTOPRESS FAIL CAUTION IN FLIGHT / REMOVED AND REPLACED CPC 2 IAW AMM 21-31-04-000/400-801-A01-PSA. A/C IS GOOD FOR SERV (N517AE)
- [SDR HNAA2026051900385](https://openairdocs.org/sdr/HNAA2026051900385), May 18, 2026: Emb EMB145LR. CONTROLLER. FAULTED. CABIN ALT 9,000FT WITH ACFT NO PRESSURIZING MEL C13835 21-12-3 PRESS CONTROL AUTO AND MANUAL. PRESS CONTROL AUTO AND MAN (N654AE)
- [SDR IXXA202604275038](https://openairdocs.org/sdr/IXXA202604275038), Apr 25, 2026: Boeing 767323. CONTROLLER. FAILED. AT FL350, MASTER WARNING, AURAL ALARM, AND CABIN ALTITUDE. CABIN ALTITUDE 10, 000, CABIN ALTITUDE ON AUTO 2 WAS NOT RESP (N227AZ)
- [SDR AALA202604143265](https://openairdocs.org/sdr/AALA202604143265), Apr 13, 2026: Boeing 737823. CONTROLLER. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AFTER TAKEOFF AUTOFAIL LIGHT ILLUMINATED, AIRCRAFT FAILED TO PR (N951NN)
- [SDR K11A2026040400376](https://openairdocs.org/sdr/K11A2026040400376), Apr 4, 2026: Boeing 7374C9. CONTROLLER. FAILED. AT FL 310 CABIN ALTITUDE WARNING LIGHT ILLUMINATED AND HORN SOUNDED, FOLLOWED QUICK ACTIONS ITEMS DECLARED EMERGENCY, IM (N730CK)
- [SDR 3EJA2026071300402](https://openairdocs.org/sdr/3EJA2026071300402), Apr 2, 2026: Cessna 525B. CONTROLLER. FAILED. PRESSURE CONTROLLER WENT BLANK IN FLIGHT. R & R PRESSURIZATION CONTROLLER. (N780JS)
- [SDR HNAA2026031700218](https://openairdocs.org/sdr/HNAA2026031700218), Mar 16, 2026: Emb EMB145LR. CONTROLLER. ABNORMAL. CABIN ALTITUDE PRESSURE INDICATION DROPPED TO 0 DURING DEPARTURE UP TO 4000FT. R & R DIGITAL CONTROLLER PER MM 21-31-01, (N662EH)
- [SDR AALA202603117222](https://openairdocs.org/sdr/AALA202603117222), Mar 9, 2026: Airbus A321231. CONTROLLER. WARNING MESSAGE. AIRCRAFT WAS GROUNDED: AIRCRAFT RETURNED TO MIA DUE TO THE FLIGHT CREW REPORTING THAT IMMEDIATELY AFTER TAKEOFF RECEIVED (N156AN)
- [SDR AALA202603118095](https://openairdocs.org/sdr/AALA202603118095), Mar 9, 2026: Airbus A321231. CONTROLLER. WARNING MESSAGE. ACRT WAS GROUNDED: ACRT RETURNED TO MIA DUE TO THE FLT CREW REPORTING THAT AFTER TAKEOFF RECEIVED CABIN PRESSURE SYS 1 & (N156AN)
- [SDR AALA202603117626](https://openairdocs.org/sdr/AALA202603117626), Mar 8, 2026: Boeing 737823. CONTROLLER. INOPERATIVE. AIRCRAFT WAS GROUNDED: AT 360 WE RECEIVED CABIN ALTITUDE AND IMMEDIATELY RAN THE QRC. THE CABIN WAS UNCONTROLLABLE IN MA (N862NN)
- [SDR DALA2026030601549](https://openairdocs.org/sdr/DALA2026030601549), Mar 6, 2026: Airbus A321211. CONTROLLER. FAULTED. DIV - TO DEN DUE TO CAB PR SYS 1 FAULT APPEARING AT FL340, FOLLOWED BY INTERMITTENT EXCESSIVE CABIN ALTITUDE MESSAGES AN (N373DX)
- [SDR DALA2026022501329](https://openairdocs.org/sdr/DALA2026022501329), Feb 24, 2026: Airbus A320212. CONTROLLER. FAULTED. DIVERTED TO DTW DUE TO CABIN PRESSURE EXCESS ECAM WARNING. FOUND OUTFLOW VALVE FAULTING ON CPC 1. REPLACED THE OUTFLOW V (N338NW)
- [SDR FDEA202602040125](https://openairdocs.org/sdr/FDEA202602040125), Feb 4, 2026: Airbus A300F4605R. CONTROLLER. FAULTED. AT FLIGHT LEVEL 370 GOT AN ECAM DUE TO HIGH CABIN PRESSURE, SHORTLY AFTER THAT THE NR 2 PRESSURE REGULATOR FAULTED, DONE (N664FE)
- [SDR CALA2026020213492](https://openairdocs.org/sdr/CALA2026020213492), Jan 30, 2026: Boeing 737724. CONTROLLER. FAULTED. CREW ADVISES AUTO PRESS FAIL LIGHT CAME ON AFTER TAKE OFF & MANUAL WOULD NOT OPERATE CORRECTLY. ACP WIRE CHECKS BTWN CPC (N27724)
- [SDR IPXA2026012891803](https://openairdocs.org/sdr/IPXA2026012891803), Jan 27, 2026: Boeing 75724APF. CONTROLLER. FAULTED. EMERGENCY DECLARED, CABIN ALTITUDE WARNING EICAS ABOVE 100 MSL. A/C @ FL 210/CABIN ALT 11500/ WARNINGS OCCURRED WITH BOT (N415UP)
- [SDR IPXA2026012791803](https://openairdocs.org/sdr/IPXA2026012791803), Jan 27, 2026: Boeing 75724APF. WARNING MESSAGE. ILLUMINATED. EMERGENCY DECLARED, CABIN ALTITUDE WARNING EICAS ABOVE 100 MSL. ACFT AT FL 210, CABIN ALT 11500. WARNINGS OCCURRED WITH  (N415UP)
- [SDR HNAA2026012200071](https://openairdocs.org/sdr/HNAA2026012200071), Jan 21, 2026: Emb EMB145LR. CONTROLLER. ABNORMAL. REJECTED TAKE OFF, DEPRESSURIZATION AUTO FAIL. R & R PRESSURIZATION DIGITAL CONTROLLER IAW EMB AMM 21-31-01, OPS CHECK G (N909AE)
- [SDR G41A2026012200053](https://openairdocs.org/sdr/G41A2026012200053), Jan 20, 2026: Lear 60LEAR. CONTROLLER. FAULTED. ON 1/20/2026, LEAR 60 N317MP CYO317 DEPARTED KAPF HEADING TO KSUS. AS THE AIRCRAFT WAS CLIMBING, THE CAPTAIN REPORTED TH (N317MP)
- [SDR CALA2026011913077](https://openairdocs.org/sdr/CALA2026011913077), Jan 15, 2026: Boeing 737924ER. CONTROLLER. FAULTY. CABIN ALTITUDE WARNING IN FLIGHT PERF BITE ON BOTH CABIN PRESS CTLRS. PRESS CTLR #1 SHOWS LEG 00 ONE FAULT. MANUAL MODE  (N68807)
- [SDR UIEA2025121401344](https://openairdocs.org/sdr/UIEA2025121401344), Dec 14, 2025: Boeing 767383. CONTROLLER. FAULTED. AT TOP OF DESCENT, CREW ALTITUDE EICAS MSG. CABIN ALT WENT TO 11,000 FT AFTER DESCENT TO 8000 FT, CABIN PRESS DIFF WAS 0 (N1511A)
- [SDR ABXA2025122315](https://openairdocs.org/sdr/ABXA2025122315), Dec 2, 2025: Boeing 767328. WARNING MESSAGE. FALSE ACTIVATION. ON DESCENT INTO BOG NEAR, BUT PRIOR TO FL250 CABIN ALT MASTER WARNING SIREN, LIGHT AND EICAS MESSAGE. EMERGENCY DECLARED (N1499A)
- [SDR CALA2025111411208](https://openairdocs.org/sdr/CALA2025111411208), Nov 10, 2025: Airbus A319132. CONTROLLER. FAULTED. CABIN PRES WARNING AT FL390. PILOTS STATED THEY SAW A FLUCTUATION OF 2500 FT BUT FELT NO PRESSURE IN EARS.CPC 2 TOOK OVE (N899UA)
- [SDR 2025FA0000746](https://openairdocs.org/sdr/2025FA0000746), Nov 5, 2025: Lear 60LEAR. CONTROLLER. DEFECTIVE. ON 11/5/2025 DEPARTING KDAL, CLIMBING THROUGH 15,000 FT, THE CAPTAIN REPORTED ABNORMAL CABIN PRESSURE INDICATING A RISE 
- [SDR HNAA2025102700724](https://openairdocs.org/sdr/HNAA2025102700724), Oct 26, 2025: Emb EMB145LR. CONTROLLER. FAULTED. AUTO PRESS FAIL MEL C29930 21-12-3 PRESS CONTROL AUTO AND MANUAL (N640AE)
- [SDR CALA2025102810669](https://openairdocs.org/sdr/CALA2025102810669), Oct 25, 2025: Boeing 737824. CONTROLLER. FAULTED. CABIN ALT WARNING AT 290. CREW STATED AT 29000FT CABIN ALTITUDE WARNING DISPLAYED, CABIN CLIMB RATE SHOWING 1000FT PER M (N12225)
- [SDR AALA202510238688](https://openairdocs.org/sdr/AALA202510238688), Oct 22, 2025: Boeing 737823. CONTROLLER. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CLIMB OUT BETWEEN 9000 AND 10,000 FEET WE GOT CABIN ALTI (N958NN)
- [SDR AALA202510238671](https://openairdocs.org/sdr/AALA202510238671), Oct 22, 2025: Boeing 737823. CONTROLLER. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CLIMB OUT BETWEEN 9000 AND 10,000 FEET WE GOT CABIN ALTI (N958NN)
- [SDR DALA2025102107693](https://openairdocs.org/sdr/DALA2025102107693), Oct 20, 2025: Airbus A320212. CONTROLLER. FAULTY. SHIP 3274 - ATB - DUE TO CABIN PRESSURE ISSUES AND LOW CABIN DIFFERENTIAL PRESSURE MESSAGE. CREW WAS ABLE TO REGAIN PRES (N374NW)
- [SDR HNAA2025101400702](https://openairdocs.org/sdr/HNAA2025101400702), Oct 12, 2025: Emb EMB145LR. CONTROLLER. FAULTED. IN DESCENT FROM 24,000 FT AT SINK RATE OF 4,000 FT/MIN PRESSURIZATION INDICATION WENT INTO RED UNTIL UNDER 10,000 FT AND (N906AE)
- [SDR 2025F00235](https://openairdocs.org/sdr/2025F00235), Oct 2, 2025: Lear 45LEAR. CONTROLLER. FAILED. N499GS TRIP 8907, 2 OCT 2025, LEG 1 KBNA KMCN. NO PAX ONBOARD. DURING CRUISE AT FL450 THE CABIN BEGAN DEPRESSURIZING. RE (N499GS)
- [SDR JJBA20250930046](https://openairdocs.org/sdr/JJBA20250930046), Sep 26, 2025: Emb EMB145XR. CONTROLLER. FAILED. DURING CLIMBOUT AUTO PRESS INCREASED UNCONTROLLED, MANUAL MODE OPERATED NORMAL. USING FIM TROUBLESHOOT TO DIGITAL CONTRO (N12201)
- [SDR 3EJA739JS083725](https://openairdocs.org/sdr/3EJA739JS083725), Aug 27, 2025: Cessna 525B. CONTROLLER. NO DISCREPANCY. CLIMBING THROUGH 12,000 MSL, THE CABIN ALTITUDE INCREASED SIGNIFICANTLY.NO MESSAGES OR NOTIFICATIONS AND THE MASKS DID N (N739JS)
- [SDR HNAA2025082500579](https://openairdocs.org/sdr/HNAA2025082500579), Aug 24, 2025: Emb EMB145LR. CONTROLLER. FAULTED. RAPID DEPRESSURIZATION AT 22,000FT USED CREW OXYGEN MASK TO DESCEND TO 10,000FT AND DIVERTED. R & R DIGITAL PRESSURIZATI (N695AE)
- [SDR 3EJA20250825001](https://openairdocs.org/sdr/3EJA20250825001), Aug 8, 2025: Cessna 750. CONTROLLER. FAULTED. CLIMBING THROUGH 4000 FT. OUT OF MYNN AMBER CABIN ALTITUDE MESSAGE ILLUMINATED. AT 10,000 FEET RED CABIN ALTITUDE ILLUMI (N956JS)

All 2,041: https://openairdocs.org/jasc/2131/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 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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