JASC 2131

Service difficulty reports · 2,042

Reports filed under 2131 · Cabin Pressure Controller, newest first.

Query with SQL
duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
  FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
  WHERE jasc_code = '2131'
  ORDER BY difficulty_date DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SDR HNAA2022042000167Controller · faultedAUTO MODE SELECTED CABIN ALT CLIMBED WOULD NOT REGULATE PRESSURIZATION. MANUAL MODE WAS NOT SELECTED. C/W TASK 21-31-03-040-800-A. ROA REACTIVATED EOV IAW AMM TASK 21-31-03-440-801-A. R/R'D PRESS DIGITAL CONTROLLER IAW AMM 21-31-01-04. OPS CK GOOD NO FURTHEApr 19, 2022 · N641AE · Emb EMB145LRSDR AALA202204192272Controller · defectiveAIRCRAFT WAS GROUNDED: CABIN PRESSURIZATION FLUCTUATES +700 VERTICAL SPEED FPM TO -700FPM IN BOTH SYSTEM 1 AND SYSTEM 2 INTERMITTENTLY DURING FLIGHT. REPLACED #1 CABIN PRESSURE CONTROLLER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 21-31-34.Apr 17, 2022 · N993AN · Airbus A300*SDR J7SA2022042000313Cabin Pressure · warning lightDIVERTED DUE TO AMBER CABIN PRESS CAS AND CABIN PRESS WARNING. MASKS DEPLOYED; CREW APPLIED RELATIVE MEMORY ITEMS, FOLLOWED QRH, DECLARED EMERGENCY, AND LANDED SAFELY AT KHPN. PERFORMED OPERATIONAL TEST OF THE INTEGRATED AIR SYSTEM CONTROLLERS IAW AMM 21-31-01Apr 16, 2022 · N587FX · Bombdr BD1001A10SDR AALA202204184111Controller · defectiveAIRCRAFT WAS NOT GROUNDED: CABIN PRESSURIZATION V/S ERRATIC DURING CLIMB TO 1200 FPM TO 600FPM WITH 1000 FPM CLOSING IN 6 SECONDS. OUTFLOW VALVE OSCILLATING, AT SAME RATE OPEN & CLOSED 4500 CAB ALT NORMAL OPERATION IN CLIMB. REPLACED #1 CABIN PRESSURE CONTROLLApr 14, 2022 · N159AN · Airbus A300*SDR MASA2022041100104None · noneCABIN ALT HI WARNING. PLACED CABIN PRESSURE CONTROL AUTO MODE-1 CHANNEL INOPERATIVE ON MEL.Apr 11, 2022 · N88341 · Emb ERJ170200LRSDR 4DPA202204100001Controller · erraticISSUE- CAB ALT IMMEDIATELY STARTED TO CLIMB ON DEPARTURE FROM LAS. QRH WAS USED TO VERIFY DIFFERENTIAL PRESSURE. WHILE RUNNING, QRH/CAB ALT REACHED 10,700FT. MANUEL CONTROL IN DN POSITION. CREW REQUESTED TO RETURN TO LAS. NO EMERGENCY WAS DECLARED PER FLIGHT CApr 10, 2022 · N253JX · Emb EMB135LRSDR AALA202204058333Controller · unserviceableAIRCRAFT WAS GROUNDED: ON CLIMB OUT AT 14,000 FEET AIRCRAFT PRESSURE FLUCTUATES UNCONTROLLABLY. FLIGHT RETURNED TO CLT LANDING SAFELY. REPLACED CABIN PRESSURE CONTROLLER #1 (AALA202204058333) AND CABIN PRESSURE CONTROLLER #2 (AALA202204053319) PER AMM 21-31-34Apr 4, 2022 · N110UW · Airbus A320214SDR AALA202204053319Controller · unserviceableAIRCRAFT WAS GROUNDED: ON CLIMB OUT AT 14,000 FEET AIRCRAFT PRESSURE FLUCTUATES UNCONTROLLABLY. FLIGHT RETURNED TO CLT LANDING SAFELY. REPLACED CABIN PRESSURE CONTROLLER #1 (AALA202204058333) AND CABIN PRESSURE CONTROLLER #2 (AALA202204053319) PER AMM 21-31-34Apr 4, 2022 · N110UW · Airbus A320214SDR DALA2022040402264None · noneSHIP 5809 - PRES - EMERGENCY DESCENT DUE TO LOSS OF PRESSURIZATION. FLIGHT CONTINUED TO DESTINATION. CORRECTIVE ACTION: REPLACED RELAYS K21 AND K10646. MTC FOUND LT HIGH STAGE VALVE STICKING. REPLACED HIGH STAGE VALVE, FAN AIR TEMP SENSOR, AND REVERSE CONTROLLApr 4, 2022 · N589NW · Boeing 757351SDR FDEA202203260704Controller · failedAT FL400 RECEIVED CABIN ALTITUDE WARNING. CABIN ALTITUDE INDICATOR DISPLAYED OVER 10,000 FEET WITH A DIFFERENTIAL PRESSURE OF APPROXIMATELY 7.0. CABIN RATE INDICATOR SHOWED A 100-200 FPM CLIMB. CARRIED OUT QRH PROCEDURE AND DESCENDED TO FL250. CABIN ALTITMar 26, 2022 · N774FD · Boeing 757200SDR AALA202203282405Controller · unserviceableAIRCRAFT WAS GROUNDED: AUTO PRESSURIZATION FAILED AFTER TAKEOFF. EMERGENCY DECLARED AND FLIGHT RETURNED TO SJO LANDING SAFELY. REPLACED CABIN PRESSURE CONTROLLER #1 (AALA202203282405) AND #2 (AALA202203285971) PER AMM 21-31-01-400-801. REPLACED CABIN PRESSURE Mar 26, 2022 · N845NN · Boeing 737*SDR AALA202203285971Controller · unserviceableAIRCRAFT WAS GROUNDED: AUTO PRESSURIZATION FAILED AFTER TAKEOFF. EMERGENCY DECLARED AND FLIGHT RETURNED TO SJO LANDING SAFELY. REPLACED CABIN PRESSURE CONTROLLER #1 (AALA202203282405) AND #2 (AALA202203285971) PER AMM 21-31-01-400-801. REPLACED CABIN PRESSURE Mar 26, 2022 · N845NN · Boeing 737*SDR AALA202203114884Connector · corrodedAIRCRAFT WAS GROUNDED: CABIN PRESSURE SYSTEM 1 AND 2 MESSAGE ON DESCENT.MAINTENANCE FOUND OUT FLOW VALVE CONNECTOR 10HLA CORRODED. REPLACED CONNECTOR 10HLA PER ESPM 20-44-10. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.Mar 10, 2022 · N810AW · Airbus A319132SDR U5QA202303030113None · noneTEB-SRQ DIVERT BACK TO TEB (EMER DECLARED, 0PAX) FOR RED CABIN ALTITUDE LIGHT ILLUMINATED. MX C/A: R&R OUTFLOW VALVE, OPS CKS GOOD.Feb 27, 2022 · N351VJ · Bombdr BD1001A10SDR VNAA202202181111Controller · unserviceableDURING CLIMB AT FL 200 THE CREW RECEIVED A CABIN ALT WARNING MESSAGE. THE OXYGEN MASKS FELL AND THE CREW DECLARED AN EMERGENCY AND RETURNED TO DFW. THEY HELD FOR QUITE SOME TIME TO BURN OFF GAS SO THEY DID NOT LAND OVERWEIGHT. TRUCKS ROLLED. THE FLIGHT LANDED Feb 15, 2022 · N564NN · Cndair CL6002D24SDR SIMA20220213002None · noneDURING CLIMB THROUGH 13,200 CABIN PRESSURIZATION ISSUE / DECLARED EMERGENCY NOTICED CABIN ALT WAS 9700 AND INCREASED TO 10,000. PERFORMED QRH AND DECEND TO 10,00 ,CABIN WENT TO 9,800 A FURTHER DECENT TO 8,000 WAS INITATED AND CABIN RETURNED TO 8,200, CABIN WARFeb 13, 2022 · N612AE · Emb EMB145LRSDR DALA2022021501008None · noneSHIP 1702 -PRES- CABIN AUTO INOP EICAS MESSAGE AND ASSOCIATED LIGHT ILLUMINATED IN CRUISE. MAN PRESSURIZATION MODE SELECTED. DURING DECENT UNABLE TO CONTROL CABIN PRESSURE. EMERGENCY DESCENT COMPLETED. MASK DID NOT DEPLOY. CORRECTIVE ACTION: FOUND WATER SUPPLYFeb 11, 2022 · N172DZ · Boeing 767332SDR DALA2022021000881None · noneSHIP 1602 -PRES- CABIN AUTO INOP EICAS MESSAGE AND ASSOCIATED LIGHT ILLUMINATED IN CRUISE. MAN PRESSURIZATION MODE SELECTED. DURING DECENT UNABLE TO CONTROL CABIN PRESSURE. MASKS DEPLOYED AND EMERGENCY DESCENT COMPLETED. CORRECTIVE ACTION: FOUND WATER SUPPLY LFeb 9, 2022 · N1602 · Boeing 767332SDR CALA2022013100272Cabin Pressure · unknownCABIN DPRESSURIZED ON DESCENT AND DPI SHOWED 0 AT 3000 FT. LOUD AIR SOUND AT 2L REPORTED FIM 21-31 TREE 803, NO FAULTS REPORTED. CYCLED OUTFLOW VALVE, NO DEFECTS WITH VALVE NOTED. ACP''D GENERAL VISUAL INSPECTION OF CABIN DOOR 2L, OUTER FUSALAGE AREA AROUND DJan 31, 2022 · N677UA · Boeing 767322SDR AALA202201259392Controller · fluctuatesAIRCRAFT WAS NOT GROUNDED: ON TAKE OFF TO ABOUT 20,000' THE PRESSURIZATION V/S HAD WILD / ERRATIC SWINGS BETWEEN 50-1000 FPM CABIN V/S STARTED STABILIZE TO NORMAL ABOVE 20,000' ACTUAL PRESSURIZATION ISSUE, NOT JUST AN INDICATION PROBLEM. REPLACED CABIN PRESSURJan 23, 2022 · N157AA · Airbus A300*SDR A6WA202201178078None · noneAT FL230 CABIN ALT SPIKED TO 5,900FT. AT 3,700 FPM. AT 10000FT, CABIN ALT DECREASED TO 900FT AT 300 FPM. FROM 10000 FEET TO LANDING, PSI'N ACTED NORMALLY. PRESSURIZATION WAS IN AUTO MODE FOR THE ENTIRE EVENT. BOTH PACKS OPERATED NORMALLY THE ENTIRE FLIGHTJan 17, 2022 · N409AW · Cndair CL6002B19SDR YENA2022011900029Knob · activation errorFLT # 625, EWR-CHS(AIR TURN BACK TO EWR). AIR RETURN TO EWR, UNABLE TO PRESSURIZE; PRESSURIZATION KNOB WAS SET TO MANUAL POSITION. KNOB PLACED IN AUTO POSITION. PERFORMED PRESSURIZATION TEST IAW AMM 21-30-00. ALL OPS CHKS GOOD. A/C OK FOR CONT SVC .Jan 15, 2022 · N187JB · Emb ERJ190100IGWSDR 2022FA0000043Pseu · failedMASTER CAUTION ACCESS DOORS CARGO DOORS ENTRY DOORS L/R CABIN ALTITUDE WAS RISING FROM 8,500 FT TOWARDS 9,200 FT AT A RATE OF 500 FT / ??? WE EXECUTED AN IMMEDIATE DESCENT TO 14,000 FT AT WHICH POINT ALL EICAS MESSAGES CLEARED MAX CABIN DIFFERENCIAL REAJan 14, 2022 · N378AX · Boeing 767300SDR JJBA20220113018Not Reported · not reportedSUPPLEMENTAL (NEW) INFORMATION: AUTO PRESSURIZATION FAIL. R&R MAIN DOOR FRAME SEAL. R&R SIDE HINGED MAIN DOOR RUBBER TRIM SEAL. OPS CHECK SAT.Jan 13, 2022 · N14177 · Emb EMB145XRSDR DALA2022011800323Controller · faultedSHIP 1814 -ATB- DUE TO EQUP COOLING OVERHEAT LIGHT ILLUMINATED. CABIN AUTO 1 INOP AND PASSENGER CABIN NOT PRESSURIZING ON SCHEDULE. CORRECTIVE ACTION: RE-ACCOMPLISHED MEL FOR EQUIPMENT COOLING EXHAUST VALVE. REPLACED CABIN PRESSURE CONTROLLER 1. (8211548)Jan 12, 2022 · N838MH · Boeing 767432ERSDR YENA2022011900025Cabin Pressure · failedFLT #6122, RIC-MCO(DIVERTED TO JFK). AFTER TAKE-OFF THE AIRCRAFT DID NOT PRESSURIZE WITH EITHER AUTO PRESSURIZATION SYSTEM, MANUAL PRESSURIZATION WAS OPERATIVE. DIVERSION TO JFK NECESSARY; CPC 1 FLAGGED ON "PFR". R & R CPC1.VERIFIED OUTFLOW VALVES CLEARED OF OJan 11, 2022 · N663JB · Airbus A320232SDR YENA2022011900023Actuator Valve · failedFLT # 1126, FLL-RDU(AIR TURN BACK TO FLL). DOOR PAX FWRD OPEN MESSAGE AFTER TAKE OFF . PRESSURIZATION CLIMBED UNTIL WE LEVELED OFF AT 21000. MAXIMUM ALTITUDE DISPLAYED 7300 DIFF PRESS 6. NO OVERWEIGHT LANDING REQUIRED; PER AMM 52-72-20, REPLACED ROLL PIN TO SHJan 11, 2022 · N298JB · Emb ERJ190100IGWSDR YENA2022011900022Actuator · failedFLT # 1126, FLL-RDU(AIR TURN BACK TO FLL). DOOR PAX FWRD OPEN MESSAGE AFTER TAKE OFF . PRESSURIZATION CLIMBED UNTIL WE LEVELED OFF AT 21000. MAXIMUM ALTITUDE DISPLAYED 7300 DIFF PRESS 6. NO OVERWEIGHT LANDING REQUIRED; PER AMM 52-72-20, REPLACED ROLL PIN TO SHJan 11, 2022 · N298JB · Emb ERJ190100IGWSDR VNAA202201121111Controller · malfunctionedDURING THE FLIGHT THE CREW RECEIVED A CABIN PRESSURE WARNING MESSAGE AND SHORTLY AFTER THE FAS REPORTED THE SMELL OF SMOKE IN THE MAIN CABIN. THE FLIGHT DIVERTED TO IAD AND STILL HAD A STRONG SMOKE SMELL IN THE COCKPIT AND MAIN CABIN AFTER LANDING. THE PAX WERJan 8, 2022 · N572NN · Cndair CL6002D24SDR QXEA2022011000018Controller · faultedGOING THROUGH 10,000-11,000 FEET CABIN PRESS MASTER WARNING CHIME AND LIGHT CAME ON. RAN THE CABIN PRESS WARNING CHECKLIST WHICH DROVE US TO THE PRESSURIZATION FAIL CHECKLIST. RETURNED TO FIELD AND NORMAL LANDING. NOTE: WHEN DUMP/MAN/AUTO WAS PUT IN MANUAL THEJan 8, 2022 · N450QX · Bombdr DHC8402SDR AALA202201126914Controller · fluctuatesAIRCRAFT WAS NOT GROUNDED: CABIN PRESSURIZATION FLUCTUATIONS AT CRUISE 600 FT/MIN. **SUPPLEMENTAL REPORT FOR AALA202201106914: REPLACED #2 CABIN PRESSURE CONTROLLER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 21-31-34 ** (CLOSED)Jan 6, 2022 · N778XF · Airbus A319112SDR DALA2022010600097Valve · inoperativeSHIP 3820 -DIV/PRESS- TO ATL DUE TO CABIN PRESSURE CLIMBING ABOVE 10K FEET. CORRECTIVE ACTION: MAINTENANCE REPLACED GROUND AIR CHECK VALVE PER B737 AMM 21-21. OPS CHECK OK AIRCRAFT RETURNED TO SERVICE.Jan 5, 2022 · N820DN · Boeing 737932ERSDR QXEA2022010300004None · inoperativeINITIAL CLIMB PSC A/C DID NOT PRESSURIZE.SLOWED RATE OF CLIMB AND REQUESTED 10,000 FEET FOR MORE CHECKLIST TIME.VERIFIED ALL SETTINGS CORRECT IAW EMERGENCY CHECK LIST.NO PRESSURIZATION.RESET ALL COMPONENTS. BLEEDS OFF.PACKS OFF.CABIN DUMP. 5 SECONDS.BACK ON .PJan 2, 2022 · N444QX · Bombdr DHC8402SDR QXEA2022010300573Seal · damagedON CLIMBOUT SAW RATE UP TO 3000' AND CABIN ALT TO 4000' THEN NORMAL. CYCLE REPEATED ONCE. ON ROLLOUT NOTICED DIFFERENCE .4 AND RATE TO 1500' FOR A FEW SEC. REMOVED FROM SERVICE. TEAR FOUND IN AFT BAG DOOR SEAL. REMOVED AFT BAG DOOR SEAL IAW Q400 AMM 52-31-26-0Dec 30, 2021 · N405QX · Bombdr DHC8402SDR AALA202112231066Controller · failedAIRCRAFT WAS GROUNDED: WHILE EN ROUTE TO DEN AT FLIGHT LEVEL 260 FLIGHT DECLARED EMERGENCY WITH KANSAS CENTER ON ACCOUNT OF BOTH AUTO PRESSURIZATION SYSTEMS FAILED. FLIGHT DECK CONTROLLED PRESSURIZATION MANUALLY AND ALTITUDE WAS NOT OUT OF LIMITS. MASKS DID NODec 21, 2021 · N815NN · Boeing 737*SDR AALA202112238324Controller · failedAIRCRAFT WAS GROUNDED: WHILE EN ROUTE TO DEN AT FLIGHT LEVEL 260 FLIGHT DECLARED EMERGENCY WITH KANSAS CENTER ON ACCOUNT OF BOTH AUTO PRESSURIZATION SYSTEMS FAILED. FLIGHT DECK CONTROLLED PRESSURIZATION MANUALLY AND ALTITUDE WAS NOT OUT OF LIMITS. MASKS DID NODec 21, 2021 · N815NN · Boeing 737*SDR YENA2021121700848Controller · malfunctionedFLT 1018, CABIN ALTITUDE HIGH WARNING MESSAGE DURING FLIGHT; FOUND MODE SWITCH ON PRESSURIZATION PANEL IN MANUAL MODE. ROTATE SWITCH TO AUTO FAULT CLEARED.A CCOMP CABIN PRESS FUNCTION TEST PER AMM 21-31-00-720-802A NO FAULTS NOTED UP TO 4.5 PSI. CONFIRM MODE SDec 17, 2021 · N239JB · Emb ERJ190100IGWSDR AALA202112082147Controller · fluctuatesAIRCRAFT WAS NOT GROUNDED: ON ARRIVAL TO LAX FLIGHT CREW REPORTED THAT THE CABIN ALTITUDE FLUCTUATED BETWEEN 3750-3800 V/S-50 TO +300 22K CABIN ALTITUDE 6500-800' AT 10K CABIN ALTITUDE WENT TO -15. AN EMERGENCY WAS DECLARED, THE AIRCRAFT LANDED AT LAX WITHOUT Dec 7, 2021 · N415AN · Airbus A321253NXSDR HNAA2021120800599None · nonePDIS 627 21-31 2596072 07DEC21 PHL CLOSE ON CLIMB OUT AIRCRAFT WOULD NOT PRESSURIZE. RESET DUMP SWITCH ON GROUND. FACT 07DEC21 11:02 PHL FOUND PRESSURE CONTROLLER IN WRONG CONFIGURATION. A/C PRESSURIZATION NORMAL. OK FOR SERVICDec 7, 2021 · N627AE · Emb EMB145LRSDR SIMA20211201003None · noneON CLIMB ABOVE 10000FT LOW CABIN PRESSURE EICAS MSG. CABIN ALT READ 11800FT. PRESSURIZATION ISSUES DECLARED EMERGENC.-C/A-RE-SET MANUAL PRESSURE CONTROL KNOB AND C/W AUTO AND MANUAL PRESSURIZATION SYSTEMS OPC IAW EMB 145 AMM 21-31-00. FOUND SATISFACTORY AT THIDec 1, 2021 · N670AE · Emb EMB145LRSDR DALA2021120207458Controller · faultedSHIP 0193 -MISC- EICAS MESSAGE CABIN AUTO INOP AFTER PUSHBACK. C/W QRH (SELECTED MANUAL CABIN PRESSURE CONTROL). WHILE RETURNING TO BLOCKS, CABIN PRESSURE INCREASED DURING THROTTLE ADVANCEMENT. CREW OPENED OUTFLOW VALVE MANUALLY CAUSING RAPID PRESSURE DECREASENov 29, 2021 · N193DN · Boeing 767332SDR 9JLA2021120131026Selector Valve · defectiveTHE FLIGHT CREW REPORTED OF A PRESSURIZATION FAULT AFTER TAKEOFF TO 9500FT WHEN THEY ELECTED TO RETURN BACK TO MMUN FOR LANDING AND EVALUATION. OPERATIONS WERE CONTINUED PER MEL 21-31-1. 16NOV2021 - THE MAINTENANCE TEAM TROUBLESHOT AND REMOVED AND REPLACED THENov 14, 2021 · N530BD · Bombdr CL6002D15SDR 2021FA0000327None · noneDIVERTED DUE TO CABIN ALTITUDE PRESSURIZATION INCREASING AT A RATE OF 800FT PER MINUTE. THE CREW IMMEDIATELY INSTRUCTED ATC THEY NEEDED TO DESCEND. THE PRESSURIZATION RATE WAS NOT DECREASING DURING DESCENT, CAUSING THE CREW TO DECLARE AN EMERGENCY. THE CABIN ANov 14, 2021 · N346FX · Emb EMB505SDR P5CA2021111100418None · noneCABIN ALT AUTO 2 STATUS MSG(<P>TRANSFERRED TO DMI # 156576 MEL 21-31-01A DUE 21 NOV 21 CAT C</P> / <P>11NOV21 - LOG PAGE 1424620 - ITEM 4: PERFORMED RESET TO AUTO 2 CABIN PRESS CONTROL UNIT. OPS CHECK GOOD. NO FAULTS FOUND IAW AMM 21-31-00. MESSAGE CLEARED. THNov 11, 2021 · N642GT · Boeing 7673Y0SDR UIEA2021110802363None · noneMANUAL OUTFLOW VALVE TO OPERATE NORMALLY(<P>OUTFLOW VALVE OPS CK C/W IAW AMM 21-31-03, OPS CHK GOOD</P>)Nov 6, 2021 · N1511A · Boeing 767383SDR GTIA2021101836056None · noneCAB EXCESSIVE ALTITUDE ALERT IN CLIMB - NO OVERWEIGHT LDG -PER TSM 21-31-00-810-809 FOUND AFT CARGO DOOR SEAL IN PROPERLY INSTALLED. REMOVED AND PROPERLY INSTALLED AFT CARGO SEAL PER AMM 53-32-18. PERFORMED AIRCRAFT PRESSURIZATION PER AMM 05-53-00 NO LEAKS OR Oct 17, 2021 · N674NK · Airbus A321231SDR YENA2021101300674Heat Exchanger · damagedFLT # 1125, RDU-FLL. AT 30,000 WE GOT CABIN HI, WE IMMEDIATELY DESCENT TO 10,000. THE MAX CABIN ALT WAS 11,100. THE ANTI-ICE SYSTEM WAS OFF AT THE TIME ; FOUND LOWER HOSE IN THE AFT OF THE PACK 2 HEAT EXCHANGER DAMAGED & DISCONNECTED, FROM THE HEAT EXCHANGER. Oct 12, 2021 · Emb ERJ190100IGWSDR AALA202110069636Outflow Valve · inoperativeAIRCRAFT WAS GROUNDED: DURING CRUISE CABIN ALTITUDE BEGAN TO CLIMB AND COULD NOT BE CONTROLLED IN AUTO. INITIATED EMERGENCY DESCENT AND FOLLOWED QUICK REFERENCE HANDBOOK PROCEDURES FOR RAPID DEPRESSURIZATION. CABIN OXYGEN MASKS MANUALLY DEPLOYED. REMOVED AND ROct 5, 2021 · N831NN · Boeing 737823SDR AALA202110063947Control Unit · inoperativeAIRCRAFT WAS GROUNDED: DURING CRUISE CABIN ALTITUDE BEGAN TO CLIMB AND COULD NOT BE CONTROLLED IN AUTO. INITIATED EMERGENCY DESCENT AND FOLLOWED QUICK REFERENCE HANDBOOK PROCEDURES FOR RAPID DEPRESSURIZATION. CABIN OXYGEN MASKS MANUALLY DEPLOYED. REMOVED AND ROct 5, 2021 · N831NN · Boeing 737823SDR AALA202110063377Control Unit · inoperativeAIRCRAFT WAS GROUNDED: DURING CRUISE CABIN ALTITUDE BEGAN TO CLIMB AND COULD NOT BE CONTROLLED IN AUTO. INITIATED EMERGENCY DESCENT AND FOLLOWED QUICK REFERENCE HANDBOOK PROCEDURES FOR RAPID DEPRESSURIZATION. CABIN OXYGEN MASKS MANUALLY DEPLOYED. REMOVED AND ROct 5, 2021 · N831NN · Boeing 737823
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