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.
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
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
SDR ASAA2013012993785Converter · failedAPU FAULT LIGHT IS ON APU WILL NOT START. FOUND FAULT CODE 49-41250 START CONVERTER UNIT R & R APU START CONVERTER UNIT IAW AMM 49-41-46. APU OPS CHECK NORMAL IAW AMM 49-11-00.SDR ASAA2013012493753Ignition Lead · failedAPU FAILED TO START. NO FLAME SHUTDOWN FAULT CODE 49-41011. REPLACED APU IGNITION UNIT REF AMM 49-41-31. REPLACED APU IGNITER PLUG REF AMM 49-41-51. REPLACED APU IGNITER PLUG LEAD REF AMM 49-41-52. PERFORMED APU IGNITION UNIT, IGNITER PLUG AND IGNITER PLUSDR ASAA2013012093719Igniter · inoperativeAPU INOP, DUE TO NO FLAME SHUTDOWN, FAULT CODE 49-41011. ACFT GROUNDED. PERFORMED FIM TASK 49-40 TASK 802 BITE CHECKS NO CURRENT FAULTS, START/OPERATION/SHUTDOWN CHECKS GOOD, INLET PLENUM AND COMPRESSOR INLET CLEAR. BITE CHECKS GOOD 5 START CYCLES, NO HISTORSDR HALA2013011100009Battery · inoperativeAPU UNABLE TO START COMPLETELY. R & R APU BATTERY IAW AMM 24-31-04. OPERATION CHECK GOOD. OK FOR SERVICE.SDR ASAA2012122893574Ignition Unit · faultedDURING MX TROUBLESHOOTING, CSS FAILED, FAULT LIGHT. FOUND FAULT CODE 49-41011. NO FLAME SHUTDOWN. MADE 2 START ATTEMPTS WITH NO EGT RISE NOTED, FAULT LT ILLUM AND FAULT CODE 349-41011. LATCHED ON EACH ATTEMPT. ACCOMP. FIM TASK 49-40, TASK 802, FOR MAINT. SDR ASAA2012122093506Starter Gen · inoperativeON TAXI IN, STARTED APU BOTH ENGINES RUNNING BATTERY DISCHARGE LIGHT ILLUMINATED FOR 30 SECONDS. DURING START SEQUENCE THE WENT OUT. ALSO OCCURRED IN GATE WITH GROUND POWER CONNECTED DURING START SEQUENCE. ACFT GROUNDED. UPON START, FOUND THAT BATTERY DISCHSDR HALA2012121500235Ecu · failedAPU INFLIGHT START WAS NOT SUCCESSFUL. MAX EGT RECEIVED WAS 812' AND MAX RPM REACHED WAS 53 PERCENT. RPM ACCELERATION SEEMED VERY SLOW. APU FAULT ANNUNCIATED. REPLACED APU ECU IAW AMM 49-61-05-004-001. SECURITY CONDITION GOOD. OPS CHECK GOOD.SDR SWAA2012120610296Starter · faultyBATTERY CHARGER ALERT WOULD NOT EXTINGUISH FOLLOWED BY UNUSUAL DISCHARGE AND ODOR IN CABIN. REMOVED AND REPLACED MOTOR PER AMM.SDR UALA2012112006700Igniter · faultyAPU WILL NOT CRANK ON START - APU. STARTED APU, OPS OK. MCDU REPORTS, APU FAULT CONDITION: IGNITION UNIT (8030KM) AND FUEL CONTROL UNIT.(8022KM) NO PARTS SFO. APU SYSTEM SELF TEST FAULTS SPEED SNSR1 (8060KM1) NOT IN STOCK. SPEED SENSOR ATA: 49-71-13 AND IGSDR UALA2012103006241Motor · faultyPACK L1 OVERHEAT AT LEFT PACK OUTLET OR LEFT PACK COMPRESSOR OUTLET OR 2) LEFT PACK FLOW CONTROL VALVES (FCV) ARE CLOSED DUE TO: FCVS FAILED CLOSED, FCVS LATCHED CLOSED BY CABIN TEMP CONTROLLER (CTC) BECAUSE OF FAULT, OVERHEAT, OR PACK CONTROL SWITCH COMMANDEDSDR CA121030005Ecu · malfunctioned(CAN) APU UNCOMANDED START CAPTAIN GOES TO TURN ON MAIN & STANDBY BATTERIES TO POWER UP THE ACFT. APU STARTS ROTATING AND LIGHTS OFF WITH THE APU START SW IN THE OFF POSITION. THERE WAS NO EICAS INFO THAT THE RT FUEL PUMP WAS ON AND THERE WAS NO APU INFO ON SDR ASAA2012102393168Apu · malfunctionedAPU FAILED FIRST START AT FL 320, WITH FAULT LIGHT ILLUMINATED. FOLLOWED QRH PROCEDURE. FAULT LIGHT EXTINGUISHED AND SECOND APU START SUCCESSFUL. NOTE APU EGT HUNG AT APPROX 450 DEGREES WITH FAULT LIGHT ON FIRST ATTEMPT. TROUBLESHOT CDU - FOUND FAULT 49-41SDR ASAA2012102093159Exciter · malfunctionedON APU START THE FAULT LIGHT CAME ON AND SMOKE WAS OBSERVED COMING OUT OF THE APU EXHAUST. ACCOMPLISHED FIM TASK 49-40, TASK 802, NO FLAME SHUTDOWN, MAINT MESSAGE 49-41011. REPLACED IGNITER PLUG AND IGNITION EXCITER REF MM 49-41-51 AND 49-41-31.SDR ASAA2012100593037Exciter · inoperativeATTEMPTED THREE COLD SOAK STARTS ON THE APU AT FL 400, ALL THREE ATTEMPTS RESULTED IN FAULT LIGHTS ILLUMINATING. REMOVED AND REPLACED IGNITION UNIT REF MM 49-41-31. PERFORMED FIM TASK 49-40 TASK 85. DISCONNECTED D10434 AND P13. CHECKED PINS 16/17 AND 2/1. NO SDR UALA2012100305621Start Valve · faultyAPU AIR START VALVE CYCLES OFF AND ON WITH THE APU RUNNING AND APU BLEED VALVE OFF. THIS SHOWS ON THE AIR PAGE. REPLACED STARTER VALVE REF NEEDS OPS AND LEAK CHECKS. ACP OPS CHECK, NO LEAKS NOTED.SDR UALA2012100205573Starter · faultyAPU WILL NOT START EGT 715 & RPM 25 THEN SHUT DOWN PERFORMED BITE CHECK AND SHOWS NO ACCELL LAST 2 START ATTEMPTS WITH PT SENSOR. SEE 49-11-00 FOR T/S INFO. TESTED HYD GEN PER MM. REPLACED STARTER AND APU STARTED NORMAL.SDR UALA2012092405411Starter · faultyAPU FAULT ON START WILL NOT START. TORUBLESHOT AS PER MM AND REMOVED AND REPLACED APU STARTER AS PER MM. OPS CHECKS GOOD. PCN 651-1150.SDR ASOA20120903075Starter Gen · shortedAPU FIRE INDICATION ON EICAS AT GATE. CREW DISCHARGED APU FIRE EXTINGUISHER. MX PERFORMED APU FIRE WARNING INSPECTION AND FOUND FIRE TO BE LIMITED TO APU STARTER GENERATOR AND ASSOCIATED DUCTING AND OUTLET SCOOP. APU PLACED ON MEL. ACFT APPROVED FOR RETURN TOSDR ASAA2012092092927Fuel Nozzle · faultedCOLD SOAK START(CSS) WAS INCOMPLETE. FIRST START ATTEMP FL390. FAULT LIGHT ILLUMINATED, WENT OUT AFTER 4 MINUTES. SECOND START ATTEMPT FL36.3 UNSUCCESSFUL WITH FAULT LIGHT ILLUMINATION. WENT OUT AT 4-5 MINUTE MARK. BUT ACFT HAD DESCENDED BELOW FL290. SUBSSDR ASAA2012091592892Warning Light · false activationAPU FAULT LIGHT ILLUMINATED DURING APU START, LIGHT WENT OUT WHEN SWITCHED TO OFF. SECOND APU START WAS NORMAL. PERFORMED APU OPS TEST IAW AMM 49-11-00-701-801. APU CHECKS NORMAL. NO FAULTS ON CURRENT STATUS.SDR ASOA20120825070Starter Gen · inoperativeTHE CREW REPORTED APU GENERATOR OFF BUS INDICATION AND A BURNING ODOR IN COCKPIT. MX REPLACED APU STARTER GENERATOR. PERFORMED OPS CHECKS GOOD AND NO BURNING ODOR WAS NOTED.SDR UALA2012082304725Contactor · faultyAPU FAULT ON FIRST START ATTEMPT ECS FAULT MSG WAS "A-C START CIRCUIT". REPLACED APU CRANK CONTACTOR. REPLACED APU STARTER MOTOR. ERASED ALL FAULT MSGS ON ECS BOX AND FAULT MSG ON EICAS APU PAGE. APU STARTED SUCCESSFULLY ON 1ST AND 2ND TRIES AT GATE IN SFOSDR UALA2012082104655Starter · faultyAPU FAILS TO START. APU NO ROTATION AFTER SWITCH TURNED ON. REPLACED STARTER PER MM, OPS CHECKED OK.SDR ASAA2012082292762Exciter · inoperativeAT GATE, APU FAILED TO START. APU FAULT LIGHT ILLUMINATED, REMAINED ON. ACFT GROUNDED. R & R APU EXCITER UNIT IAW AMM 49-41-31. APU OPS CHECKED NORMAL.SDR ASAA2012081792732Igniter · failedFIRST CSS OF APU RESULTED IN FAILED START AND APU FAULT LIGHT. ALTITUDE OF 37,000. FAULT LIGHT WENT OUT AFTER QRH PROCEDURE AND 3 MIN. SECOND CCS AT FL 350 WAS SUCCESSFUL. PERFORMED APU BITE TEST - FOUND CODE 49-41010 NO ACCELLERATION SHUTDOWN. PERFORMED SDR UALA2012073004116Exciter · inoperativeAPU HAD SHUTDOWN, FAULT LIGHT ILLUMINATED AND EICAS MESSAGE. APU FAULT DISPLAYED. THREE FAILED START ATTEMPTS ALL HUNG AT 25 PCT RPM BEFORE AUTO ABORT. FOUND NO SPARK ON APU ENGINE START, REPLACED EXCITER BOX AND LEAD, OPS CHECKED GOOD.SDR HALA2012072900187Switch · looseAPU FAILED TO START ON GROUND. FOUND APU START SWITCH VERY LOOSE, CAN NOT SELECT PROPER START POSITION, SECURED START SWITCH. STARTED NORMAL IAW AMM 49-21-00.SDR HALA2012072700183Exciter · inoperativeAPU WOULD NOT START TWO ATTEMPTS, HUNG UP AT RPM 18. BITE APU ECU NO FAULTS NOTED. ON TEST FOUND APU IGNITION INOPERATIVE. R & R APU IGNITION EXCITER & IGNITER PLUG. APU START NORMAL & OPS CHECKED GOOD. OK FOR SERVICE IAW AMM 49-41-03-049-41-02.SDR UALA2012072504034Cable · failedAPU WILL NOT START. REPLACED APU IGNITER CABLE AND PLUG REF MM 49-41-04 AND MM49-41-02. APU OP CHECKED RUN OKSDR HALA2012071400173Starter · failedAFTER LANDING FAULT LIGHT ILLUMINATED ON 1ST ATTEMPT TO START APU. MAGENTA ADD DISPLAYED AT APU OIL QUANTITY. R & R STARTER ASSY IAW AMM 49-41-01 AFTER TROUBLESHOOTING IAW FIM 49-11-00. PERFORMED OPS AND LEAK CHECKED, NO DEFECTS NOTED. OK FOR SERVICE.SDR ASAA2012070592501Exciter · failedAPU FAULT LIGHT ILLUMINATED ON START ATTEMPT. WAITED 5 MIN, FAULT LIGHT EXTINGISHED ATTEMPTED SECOND START, FAULT LIGHT ILLUMINATED AGAIN. R & R APU IGNITION UNIT, IGNITER PLUG, AND IGNITION LEAD IAW AMM 49-41-31, 49-41-51 AND 49-41-52. PERFORMED APU STARTISDR QXEA2012062800583Igniter · failedAPU FAIL LIGHT ILLUMINATED DURING START ATTEMPT WITH A SIGNIFICENT AMOUNT OF FUEL DUMPED ON THE GROUND UNDER THE TAIL SECTION. HEAVY FUEL ODOR INSIDE ACFT. R & R IGNITOR PLUGS WITH NEW IAW AMM TASK 49-40-04-000-801/49-40-04-400-801. PERFORMED START PROCEDURSDR UIEA2012062400278Battery · inoperativeAPU FAULT ON GROUND - IAW MCC. REPLACED APU BATTERY WITH REPAIRED UNIT IAW AMM 34-31-04. OPS /GND CHECK - GOOD. OK FOR CONTINUE SERVICE.SDR 9JLA2012071904180Igniter Box · failedCREW REPORTED THAT THE APU WOULD NOT START, TROUBLESHOOTING IDENTIFED THE APU IGNITER BOX DEFECTIVE. A NEW UNIT WAS INSTALLED FUNCTIONAL CHECKED SATISFACTORY.SDR UIEA2012062300276Starter · malfunctionedAPU DIDN'T START ON TAXI-IN. THREE ATTEMPTS. PERFORMED OPS CHECK OF APU START SYS. IAW FIM 49-11-00. APU STARTEDSDR UIEA2012062200275Apu · faultedAPU FAULT EICAS AFTER LANDING THREE ATTEMPTS. PERFORMED OPS CHECK OF APU IAW FIM 49-11-00, FIG 106A. NO FAULTS NOTED - GROUND CHECK OK.SDR QXEA2012061600470Igniter · failedAPU FAIL MESSAGE ON APU POWER BUTTON AFTER ATTEMPTED START OF APU. FUEL SMELL ENTERED CABIN. CLEANED AND INSPECTED APU FOR ANY ACTIVE LEAKS, NO ACTIVE LEAKS FOUND. VENTILATED CABIN, FUEL ODOR WENT AWAY. COMPLIED WITH HS 49-0008 WITH NO DEFECTS NOTED. NO CURSDR ASAA2012060992332Exciter · malfunctionedAPU FAILED TO START. FAULT CODE 49-41011. MAINT MESSAGE NO FLAME SHUTDOWN. REPLACED THE APU IGNITION UNIT (EXCITER) IAW AMM 49-41-31-400-801. OPS NORMAL.SDR ASAA2012061792378Exciter · inoperativeTWO APU START ATTEMPTS BOTH RESULTED IN FAULT LIGHT , NO START. ACFT GROUNDED. R & R, AND TESTED APU IGNITION UNIT IAW MM 49-41-31-400-801. TEST PASSED. APU BITE SHOWS NO CURRENT FAULTS THROUGH 3 START CYCLES. REPAIR CONFIRMATION SUCCESSFUL IAW FIM 49-40-00SDR UIEA2012060100256Starter · failedAPU WILL NOT START. REMOVED & REPLACED APU STARTER PER AMM 49-41-01, SYSTEM OPS CHECKED GOOD.SDR ASOA201201711Motor · failedAPU WOULD NOT START. TWO ATTEMPTS MADE ON GROUND POWER AND ONE ATTEMPT ON BATTERY. APU RPM WOULD NOT GO ABOVE 18 PERCENT. OBSERVED SMOKE COMING FROM INTAKE BELOW NR 1 ENGINE, R & R APU STARTER MOTOR IAW AMM 49-41-07. OPS CHECKED GOOD, COMPLETED THREE APSDR ASAA12511615Sensor · failedAPU FAULT LIGHT ILLUMINATED ON 2 ATTEMPTED CSS STARTS AT FL 370. APU STARTED ON 3RD ATTEMPT AT FL300. ACFT GROUNDED. APU BITE SHOWED TWO FAILED START ATTEMPTS WITH OVERTEMP SHUTDOWN MAINT MSGS 49-31016 LOGGED. PERFORMED TWO STARTS FOR GROUND VERIFICATION, SDR UALA2012053103034Charger · faultedAPU WON'T START, THREE ATTEMPTS. GET FAULT LIGHT EACH TIME. ACCOMPLISHED APU BITE CHECK FOUND NO ACTIVE FAULTS. STARTED APU NORMAL, OBSERVED APU BATTERY VOLTAGE DROPPED TO 16V, SHUTDOWN APU AND OBSERVERED APU BATTERY CHARGER. AMPS LESS THAN 38.5 AMPS. REPLSDR MASA2012052734820Ecu · inoperativeAPU AUTO SHUT DOWN IN FLIGHT WITH ONE GENERATOR ALREADY ON MEL. CREW EXPERIENCED MULTIPLE ELECTRICAL FAILURES DUE TO ONLY ONE GENERATOR BEING ON LINE. FLIGHT DIVERTED TO NEAREST SUITABLE AIRFIELD. NO EMERGENCY WAS DECLARED. MAINTENANCE IS CURRENTLY GATHERISDR UALA2012052102863Starter · faultedAFTER LANDING APU WOULD NOT START. THREE ATTEMPTS MAX EGT 777 N40. PRIOR START IN AIR WAS OK. CLEANED CONNECTORS AT IGV, FCU & FUEL FLOW DIVIDER & SOLENOID VALVE PER AMM & MM(S) RESPECTIVELY, CHECKED ALL MAG CD'S PER MM. FOUND CLEAN AND REPLACED APU STARTERSDR UALA2012050402634Charger · faultyBATTERY CHARGER APU MESSAGE. REPLACED APU CHARGER AND BATTERY PER MM, CKS OKAY.SDR UALA2012042302435Igniter · failedAPU HANGS BELOW 20 PERCENT WITH NO EGT RISE DURING ACCELERATION. REPLACED IGNITER PLUGS PER MM.SDR UALA2012042302425Starter · failedAPU CONTROL STATUS MESSAGE. STARTER MOTOR HAS BRUSH WEAR. REPLACED APU STARTER MOTOR AS PER MM. OPS CHECKED NORMAL.SDR UALA2012040202062Igniter · crackedAPU UNABLE TO START. BITE CHECKED ECU NOTED "ABORT START" PREVIOUS 5 SEGMENTS & RESET ECU. ACCOMPLISHED THREE SUCCESSFUL STARTS, UNABLE TO DUPLICATE. REMOVED APU IGNITER PLUG, FOUND CERAMIC INSULATOR CRACKED & WORN. REPLACED NEW IGNITER PLUG AND LEAD IAWSDR USAA2012040300004O-Ring · leakingPACKS WERE EMITTING A PUNGENT, ACRID ODOR, MAINTENANCE FOUND EXTERNAL LEAK AT APU STARTER ADAPTER PAD. REPLACED ADAPTER PAD O-RING IAW AIRBUS MAINTENANCE MANUAL 49-42-51. LEAK CHECK GOOD.
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