JASC 4940

Service difficulty reports · 1,424

Reports filed under 4940 · APU Start/Ignition System, 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 = '4940'
  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 ASAA2023070843940Unknown · unknownAPU FAULT ON START UP, AFTER LANDING. GROUNDED - YES. (RESOLVED ON W/O: 1961088 TASKCARD: N/R-00001 ) OPS CHECKED APU. FOUND EXCESSIVE BUBBLES IN OIL RESERVOIR SIGHT GAUGE. ALSO FOUND AN OIL LEAK AT THE TURBINE SECTION OF THE TURBINE BEARING SCAVANGE RETURN LIJul 8, 2023 · N962AK · Boeing 7379SDR ASAA2023070143846Unknown · unknownAPU FAILED START AT FL380. APU FAULT LIGHT ILLUMINATED, THEN EXTINGUISHED AFTER FIVE MINUTES. SUCCESSFUL APU START AT FL 320 45 MINUTES AFTER FIRST ATTEMPT. GROUNDED - YES. PER CARL SEAMC, COLD SOAK START SUCCESSFUL. THIS CLEARS MEL49-99E.Jul 1, 2023 · N506AS · Boeing 737890SDR ASAA2023062943805Unknown · unknownTWO APU START ATTEMPTS RESULTED IN APU FAULT LIGHT ILLUMINATION. GROUNDED - YES. PER B737-9 FIM TASK 49-40-00-810-818 VERIFIED NO VISUAL DAMAGES TO STARTER AND CANNON PLUG ATTACHING. AFTER FURTHER INVESTIGATION, DELTA P POPPED ON LUBE MODULE FILTER. REMOVED ANJun 29, 2023 · N931AK · Boeing 7379SDR ASAA2023062743806Unknown · unknownUPON ARRIVAL IN SEA, APU WOULD NOT START AND WE GOT A FAULT LIGHT. GROUNDED - YES. CK'D AND REL PER MEL 49-99A. MAINT MSG #49-41012. STARTED APU REF MM 49-11-00-860-801. STARTS NORMALLY.Jun 27, 2023 · N431AS · Boeing 737990ERSDR ASAA2023062743762Unknown · unknownAPU FAULT LIGHT ILLUMINATED. GROUNDED - YES. BITE CHECKED APU REF AMM CH 49-61-00-700-801, FOUND NEW ACTIVE FAULT MAINT MESSAGE 49-41254 START CONVERTER UNIT SHOWS START SYSTEM INOP, OCCURRED AT 1852Z 27JUN2023. IN FAULT HISTORY FOUND THAT MAINT MESSAGE OCCURRJun 27, 2023 · N935AK · Boeing 7379SDR ASAA2023062743763Unknown · unknownPILOT RPTS APU FAULT LT ILLUMINATES ON START, APU WON'T START. GROUNDED - YES. PFMD FULL POWER RESET OF A/C SUSPECT BATTERY SWITCH TURNED OFF BEFORE 2 MIN SHUTDOWN. NO FAULTS FND ON START UP REF IFIM 31-00-00-810-803.Jun 27, 2023 · N963AK · Boeing 7379SDR ASAA2023062643740Unknown · unknownFAULT LIGHT ILLUMINATES DURING APU START. GROUNDED - YES. ON DEFERRAL.Jun 26, 2023 · N587AS · Boeing 737890SDR ASAA2023062643764Unknown · unknownAPU FAULT LIGHT ON TAXI IN APU START UP, ONLY ONE ATTEMPT. GROUNDED - YES. PERFORMED APU BITE TEST PER IFIM TASK 49-40-00-810-805. INTERMITTENT FAULT, NO OTHER DEFECTS NOTED OPS CHECK GOOD, NO DEFECTS NOTED.Jun 26, 2023 · N974AK · Boeing 7379SDR DALA2023062605135Unknown · unknownSHIP 5645 - ATB - LEFT ENGINE GENERATOR ON MEL, APU WAS INADVERTENTLY TURNED OFF DURING CLIMB. APU RESTARTED ON THE THIRD ATTEMPT, MAINTENANCE AND DISPATCH ELECTED TO RETURN TO ATL. CORRECTIVE ACTION: NO FAULTS OR MINIFLAGS FOUND ON ECU BITE. ECU WAS REPLACED Jun 26, 2023 · N545US · Boeing 757251SDR ASAA2023062543741Unknown · unknownTWO APU FAULTS ON SEQUENTIAL STARTS. DID NOT TRY A THIRD ATTEMPT. GROUNDED - YES. ON DEFERRAL.Jun 25, 2023 · N979AK · Boeing 7379SDR ASAA2023062243685Unknown · unknownAPU FAULT LIGHT WHEN ATTEMPTING TO START UPON ARRIVAL IN SEA. TRIED TWICE, NO JOY. GROUNDED - YES. PERFORM OPERATION CHECKS OF APU PER AMM 49-11-00 AND NO FAULT FOUNDJun 22, 2023 · N954AK · Boeing 7379SDR HALA2023062000130Unknown · unknownETOPS - AFTER LANDING APU FAULT AUTO SHUTDOWN, TRIED 2 MORE TIMES NO START, SAME FAULT. REMOVED AND REPLACED APU STARTER - MOTOR. OPS CHECK, LEAK CHECK GOOD WORK PERFORMED IAW AMM 49-42-51-000-801-A OK TO RETURN TO SERVICEJun 18, 2023 · N361HA · Airbus A330*SDR ASAA2023061543623Converter · faultyAFTER LANDING, APU WOULD NOT START AFTER 2 ATTEMPTS. GROUNDED - YES. DURING INITIAL EVALUATION FOUND ACTIVE FAULT 49-41254, REF B737-9 IFIM TASK 49-40-00-810-818. INSPECTED APU STARTER GENERATOR ELECTRICAL CONNECTOR AND THE HARNESS, NO DEFECT FOUND, REF B737-9Jun 15, 2023 · N920AK · Boeing 7379SDR ASAA2023061043534Exciter · inoperativeAPU FAILED TO START. FAULT LIGHT AND LOW OIL PRESSURE LIGHT ARE ON. GROUNDED - YES. HAD MAINTENANCE MESSAGE " NO FLAME SHUTDOWN". PERFORMED B737-9 IFIM 49-40-00-810-804. VISUALLY INSPECTED APU AND FOUND RED BUTTON ON LUBE FILTER CASE EXTENDED. REMOVED AND REPLJun 10, 2023 · N920AK · Boeing 7379SDR ASAA2023052843385Unknown · unknownAPU FAULT LIGHT ON FIRST START ATTEMPT ON TAXI IN, WAITED 5 MINUTES, FAULT CLEARED, SUCCESSFUL START ON ATTEMPT #2. GROUNDED - YES. PERFORMED TROUBLESHOOTING & FOUND MAINTENANCE MESSAGE 49-41012 NO APU ROTATION SHUTDOWN & 49-41254 START CONVERTER UNIT SHOWS STMay 28, 2023 · N924AK · Boeing 7379SDR I5PA2023052788803Starter · faultyFLT NO: MGE303. ESI - APU START FAILED ON THE GROUND. FOUND FAULTY APU STARTER. REPLACED STARTER AND CONFIRMED APU OPERATIONAL PER THE APPLICABLE MANUAL.May 27, 2023 · N888LT · Boeing 757230SDR ASAA2023051943304Starter · faultyAPU FAULT LIGHT ILLUMINATED AFTER START ATTEMPT. SELECTED APU SWITCH OFF THE FAULT LIGHT WENT OUT. ATTEMPTED A SECOND START WITH THE SAME RESULT. FAULT LIGHT ILLUMINATED. GROUNDED - YES. REPLACED APU SCU. REF B737-9 AMM 49-41-61.May 19, 2023 · N972AK · Boeing 7379SDR ASAA2023051643257Igniter · faultyAPU FAULT LIGHT DURING APU START. GROUNDED - YES. REMOVED AND REPLACED APU IGNITER PLUG REF B737-800 AMM 49-41-51.May 16, 2023 · N519AS · Boeing 737890SDR I5PA2023051288801Starter · faultyFLT. NO. MGE401 EVENT AND ESI - APU IN-FLIGHT START FAILED. REPLACED APU STARTER MOTOR.May 12, 2023 · N888LT · Boeing 757230SDR ASAA2023050443156Unknown · unknownAPU FAULT ON TAXI IN. APU WOULD NOT START. GROUNDED - YES. FOUND FAULT 49130100 WITH ASSOCIATED MAINT MSG 49-41012 AND WAS NOT ACTIVE. STARTED B737-9 IFIM 49-40-00-810-805 INITIAL EVAL AND NO ACTIVE FAULT. HOWEVER WHEN STARTING THE APU FAULT LT APPEARED WITH FMay 4, 2023 · N956AK · Boeing 7379SDR HALA2023042800095Igniter Box · faultyETOPS - APU AUTO SHUTDOWN, FAULTING IGNITION EXCITER (8030KM) REPLACED APU IGNITION UNIT REF AMM 49-41-38. ECB SELF TEST GOOD, APU OPS CHECK GOOD. OK TO CONTINUE SERVICE.Apr 27, 2023 · N209HA · Airbus A321271NSDR ASAA2023032442579Exciter · inoperativeAPU FAULT LIGHT CAME ON AT START UP. GROUNDED - YES. REMOVED AND REPLACED IGNITION EXCITER UNIT REF B737-800 AMM 49-41-31. OPERATIONAL TEST PASS. APU OPERATES NORMAL.Mar 24, 2023 · N594AS · Boeing 737890SDR ASAA2023032342580Unknown · unknownGOT FAULT LIGHT WHEN ATTEMPTING TO START APU ON LANDING. GROUNDED - YES. INTERATED FAULT HISTORY FOUND 49-41254, REF B737-9 IFIM 49-40-00-810-818, RESTARTED APU 2 TIMES OPS GOOD AFTER NO FAULTS IN STATUS ACTIVE OR NOT ACTIVE.Mar 23, 2023 · N978AK · Boeing 7379SDR ASAA2023031542415Exciter · faultyDURING START ATTEMPT OF APU, THE FAULT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED IGNITION EXCITER BOX AND IGNITER PLUG LEAD ON APU WITH REF B737-900 AMM 49-41-31, AND AMM 49-41-52.Mar 15, 2023 · N469AS · Boeing 737990ERSDR ASAA2023031242375Unknown · unknownAPU "FAULT" LIGHT WHILE ATTEMPTING START. GROUNDED - YES. IN OMF FOUND MAINT MESSAGE 49-41254 START CONVERTER UNIT SHOWS START SYSTEM INOP. PERFORMED GVI OF CONNECTOR P6 REF B737-9 AMM 49-11-01 AND B737-9 IFIM 49-40-00-810-818. NO DEFECTS NOTED. STARTED AND RAMar 12, 2023 · N938AK · Boeing 7379SDR FDEA202302040234Transformer · failedWHILE ATTEMPTING TO START APU, GOT AN APU FAULT, THEN ELECTRICAL FUMES AND SMOKE IN COCKPIT PULLED APU/ START C/B. OPEN FRONT PANEL OFF OF 120 VU, INSPECTED WIRING, AND APU START CONTACTOR 5KA, APPEARS TO BE IN GOOD SHAPE, NO DAMAGE, 50 AMP BREAKER 10XH POFeb 4, 2023 · N671FE · Airbus A300*SDR I5PA2023012575704Starter · faultyFLT NO. N/A. (MX). ESI - APU FAILED TO START. REPLACED APU STARTER PER AMM 49-41-01.Jan 25, 2023 · N757QM · Boeing 75729JSDR FDEA202301200157Exciter · failedPDIS 113 49-99 8422 20JAN23 CDG FACT U APU START ATTEMPT UNSUCCESSFUL. FL350, -59 DEGREES CELSIUS, AND THREE ATTEMPTS MADE. NEED TO INITIATE ETOPS VERIFICATION FLIGHT FOR APU IN-FLIGHT START PER GMM 15-9-0 (REF ITEM 49-99/8422) REFER TO ITJan 20, 2023 · N113FE · Boeing 767300SDR IPXA2023011659892Ignition Sys · faultedINSPECTION TYPE: ETOP, APU FAULT AFTER LANDING ICNPERFORMED ECU BITE TEST PER FIM TASK 49-11-00-802-002, FOUND "IGN UNIT" FAULT. CYCLED APU PRIME CONTROL C/B, THEN ECU BITE TEST & APU OPS CHECKED OK PER AMM 49-61-00 & 49-21-00. A/C OK FOR SVCJan 15, 2023 · N352UP · Boeing 76734AFSDR ASAA2023011391503Converter · inoperativeAFTER LANDING, APU WOULD NOT START. FAULT INDICATED. GROUNDED - YES. REMOVED AND REPLACED APU SCU IAW B737-800 AMM 49-41-61/401. COLD SOAK START PASSED. ORIG SUBMISSION DATE: 1/13/2023Jan 9, 2023 · N530AS · Boeing 737890SDR ASAA2022112740982Starter Gen · faultedNO APU START. GROUNDED - YES. REMOVED AND REPLACED STARTER GENERATOR REF B737-900 AMM 49-41-21. ORIG SUB DATE: 12/1/2022Nov 27, 2022 · N435AS · Boeing 737990ERSDR AALA202211016754O-Ring · leakingAIRCRAFT WAS GROUNDED: VERY STRONG DIRTY SOCK SMELL AFTER TAKEOFF THROUGHOUT CABIN AND FLIGHT DECK. FLIGGHT CREW DONNED OXYGEN MASKS AND ACCOMPLISHED SMOKE ODOR FUME CHECKLIST. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT WHERE IT LANDED SAFELY WOct 30, 2022 · N8027D · Airbus A319115SDR ASAA2022102240467Warning Light · false activationAPU FAULT LIGHT ON START. GROUNDED - YES. FOUND FAULT CODE 49-41012 ON BITE TEST, APU REMAINS ON MEL 49-1B. PERFORMED B737-900 FIM 49-40 TASK 803 FAULT 49-41012 NOT CURRENT NO OTHER ACTIVE FAULTS ASSOCIATED NOT ACTIVE FOR 8 STARTS OPERATED APU SEVERAL TIMES NOct 22, 2022 · N477AS · Boeing 737990ERSDR HALA2022102200278Igniter · failedETOPS - APU AUTOSHUTDOWN - TRIED A SECOND TIME WITH ANOTHER AUTOSHUTDOWN. REMOVED AND REPLACED IGNITER AS PER AMM 49-41-41-400-0041-A, ALSO REMOVED AND REPLACED EXITER BOX AS PER AMM 49-41-38-400-003-A, PERFORMED OPS CHECK NORMAL. APU VERIFICATION FLIGHT FOROct 22, 2022 · N216HA · Airbus A321271NSDR AALA202210182370Fuse · blownAIRCRAFT WAS GROUNDED: STRONG HOT ELECTRICAL SMELL ON DESCENT THROUGH 13,000 ONLY NOTICEABLE IN THE FLIGHT DECK. MAINTENANCE FOUND THE APU START FUSE (6KA) BURNT / BLOWN IN THE FLIGHT DECK AND REPLACED IT PER AMM 49-42-00-960-003-A. A SATISFACTORY OPERATIONAOct 16, 2022 · N3014R · Airbus A319115SDR HALA2022093000264None · noneETOPS - APU AUTO SHUT DOWN AT RON SPOT. 2 FAILED STARTS. REPLACED LEAD ASSY AND PLUG IGNITER PER AMM 49-41-41 AND 49-41-43. NO HELP. P/N OFF/ON: 3876132 (CABLE ASSY) P/N OFF/ON: 3057664 FOR IGNITER. REPLACED EXCITER BOX REF AMM 49-41-38. P/N OFF/ON:3888058-7Sep 29, 2022 · N218HA · Airbus A321271NSDR ASAA2022092540076Ignition Unit · failedAPU FAULT LIGHT CAME ON AFTER FAILED START. GROUNDED - YES. REMOVED AND REPLACED IGNITION UNIT REF B737-9 AMM 49-41-31.Sep 25, 2022 · N932AK · Boeing 7379SDR ASAA2022091939997Apu · warning lightAPU FAULT LIGHT ON START UP AFTER LANDING. GROUNDED - YES. FOUND FAULT CODE 49130100 WITH CORRELATED MTX MESSAGE. 49-41254 START CONV. SHOWS START SYSTEM INOP. PERFORMED B737-9 IFIM TASK 49-40-00-810-818 START FAULT ISOL. PROCEDURE, FOUND NON ACTIVE FAULT, SUSSep 19, 2022 · N928AK · Boeing 7379SDR ASAA2022090639924Starter Gen · faultyAPU FAULT LIGHT DURING TAXIN IN. GROUNDED - YES. REMOVED AND REPLACED APU STARTER GENERATOR PER B737-800 AMM 49-41-21. PERFORMED OPS AND LEACK CHECKS . OPS AND LEACK CHECKS GOOD REF AMM 49-41-21-400-801 STEPS 3I -3L.Sep 6, 2022 · N569AS · Boeing 737890SDR YENA2022083000846None · failedFLT#1926, LGW-BOS. (ETOPS) 'APU AUTO-SHUTDOWN X2 ON GROUND WHILE TAXING TO GATE; REMOVED AND REPLACED IGN EXCITER ON APU PER AMM 49-41-38-400-003-A. OP'S CHECK'S OK.'Aug 29, 2022 · N4062J · Airbus A321271NSDR ASAA2022082739706Ignition Unit · faultyAPU START FAULT DURING START. GROUNDED - YES. REPLACED THE APU IGNITION UNIT, APU STARTS AND OPERATES NORMALLY, REF B737-900 AMM 49-41-31-000-801.Aug 27, 2022 · N442AS · Boeing 737990ERSDR ASAA2022081539527Generator · faulty"MAINT" LIGHT ILLUMINATED DURING APU START, APU OPERATED NORMALLY. GROUNDED - YES. REMOVED AND REPLACED STARTER GENERATOR UNIT REF B737-800 AMM 49-41-21.Aug 15, 2022 · N577AS · Boeing 737890SDR ASAA2022081239503Starter Gen · faultyAPU FAULT LIGHT DURING APU START. GROUNDED - YES. REMOVED AND REPLACED STARTER-GENERATOR REF B737-900 AMM 49-41-21.Aug 12, 2022 · N440AS · Boeing 737990ERSDR ASAA2022081039476Converter · inoperativeAPU FAULT ON START, DID NOT START. GROUNDED - YES. REMOVED AND REPLACED START CONVERTER UNIT REF B737-900 AMM 49-41-61.Aug 10, 2022 · N440AS · Boeing 737990ERSDR ASAA2022080139326Unknown · faultyAPU FAULT LIGHT. GROUNDED - YES. REMOVED AND REPLACED STARTER CONVERTER UNIT REF B737-9 AMM 49-41-61. OPS CHK AND BITE TEST GOOD.Aug 1, 2022 · N934AK · Boeing 737SDR ASAA2022080139306Generator · failedAPU FAILED TO START. FAULT LIGHT ON. GROUNDED - YES. REMOVED AND REPLACED APU STARTER GENERATOR REF B737-800 AMM 49-41-21-400-801. REMOVED AND REPLACED START CONVERTER UNIT REF AMM 49-41-61/401.Aug 1, 2022 · N585AS · Boeing 737890SDR ASAA2022073139325Unknown · faultyAPU FAILED START - FAULT CODE 49-41012 NO APU ROTATION SHUTDOWN. GROUNDED - YES. REMOVED AND REPLACED APU IGNITOR PLUG PER ASA TASK CARD 78349007 AND B737-800 AMM 49-41-51. APU OPS CHECK GOOD.Jul 31, 2022 · N585AS · Boeing 737SDR I5PA202072988801Apu · activation errorAPU FAILED TO START IN FLIGHT PER THE FM LIMITATIONS. A BITE CHECK OF THE ECU WAS PERFORMED PER THE APPLICABLE FIM AND DID NOT REVEAL ANY FAULTS. A APU VERIFICATION FLIGHT WAS ACCOMPLISHED ON THE NEXT FLIGHT AND THE APU STARTED IN FLIGHT PER THE FM LIMITATIONSJul 29, 2022 · N888LT · Boeing 757230SDR ASAA2022072539230Generator · faultyAPU MAINT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED APU STARTER GENERATOR IAW B737-800 AMM 49-41-21.Jul 25, 2022 · N560AS · Boeing 737890SDR AALA202207190194O-Ring · leakingAIRCRAFT WAS GROUNDED: ON DESCENT NOTICED STRONG DIRTY SOCK ODOR. MAINTENANCE FOUND THE APU STARTER LEAKING OIL AND INGESTING IT INTO THE APU INLET. REPLACED APU STARTER O-RING PER AMM 49-42-51 AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK.Jul 15, 2022 · N9004F · Airbus A319115
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