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 CA140923002Armature · damaged(CAN) APU STARTER GENERATOR FAILED TO START. THE APU STARTER GENERATOR WAS REPLACED AND THE APU STARTED NORMALLY. UPON REPAIR SHOP INVESTIGATION IT WAS NOTED THAT THE BRUSHES WERE SEVERELY DETERIORATED AND THE INTERNAL PARTS OF THE GENERATOR WERE HEAVILY CONTASDR ASAA2014090809084Converter · malfunctionedAPU FAULT LIGHT ILLUMINATED DURING APU START AT FL380. CSS REQUIRED ON DISPATCH RELEASE. ACFT GROUNDED. REPLACED APU START CONVERTER UNIT REF MM:49-41-61, OPS CK NORMAL.SDR Z5FA2014082357101Unknown · malfunctionedON A POSITION FLIGHT CLIMBING OUT OF 18000, APU WAS SHUTDOWN. HOWEVER, AS THE RPM REACHED 20 % ON THE SHUTDOWN PROCESS, APU STARTED AN UNCOMMANDED RESTART INFLIGHT. AFTER THE COMPLETION OF THE START SEQUENCE, APU WAS SHUTDOWN FOR THE SECOND TIME. AGAIN THE SDR ASAA2014081908892Switch · unknownDURING START, APU FAULT CAME ON WITH NO START. ACFT GROUNDED. FAULT/MAINT HISTORY HAS FAULTS: 49-41012, 49-15004, 49-72104. CLEARED FAULTS AND STARTED SUCCESSFUL. PERFORMED SUCCESSFUL COLD SOAK START. COMPLETED APU INLET DOOR ADJUSTMENT AND INLET DOOR POSSDR ASAA2014080808792Warning Light · illuminatedAPU FAULT LIGHT DURING START ATTEMPT. ACFT GROUNDED. APU OPS CHECKED GOOD IAW MM 49-11-00. NO HISTORY 30 DAYS. APU STARTED NORMALLY, THREE TIMES. CURRENT STATUS SHOWS NO FAULTS.SDR UIEA2014080500355Gasket · unknownAPU IGNITER PLUG REQUIRES NEW GASKET. REPLACED APU IGNITER PLUG GASKET WITH NEW GASKET IAW AMM 49-41-02.SDR 7GMB2014080511771Starter Gen · failedON APU CHANGE, STARTER GEN WAS TRANSFERRED FROM OLD APU & INSTALLED. DURING START UP, APU SHUTS DOWN WHEN GEN COMES ON LINE. FOUND APU STARTER GEN COOLING FAN TIPS RUBBING INSIDE DUCT COVER. REPLACED STARTER GEN WITH OVERHAULED UNIT. OPERATIONS CHECKED GOOSDR ASOA20140722081Start Valve · faultyTHE CREW REPORTED ON CLIMB OUT OF STL, AFTER SWITCHING TO ENGINE BLEEDS THEY NOTICED A STRONG ODOR SIMILAR TO "BURNED FIREWORKS". MX PERFORMED A GENERAL VISUAL INSPECTION OF NR 1 PACK SYS, PERFORMED HIGH POWER RUNS, AND PERFORMED A VISUAL INSPECTION OF THE RESDR CALA2014071191455Unknown · malfunctionedUPON LANDING & APU START, APU FAULT LIGHT ILLUMINATED. APU IGNITION EXCITER UNIT REPLACED, IGNITION LEAD REPLACED & IGNITER PLUG REPLACED. SYS RETURNED TO NORMAL OPERATIONAL STATE. FUNCTION TEST OF APU CARRIED OUT SUCCESSFULLY. FIVE ATTEMPTED STARTS TRIED SDR ASAA2014062408344Exciter · faultedAPU FAULT LIGHT ILLUMINATED DURING START AFTER LANDING. ACFT GROUNDED. PERFORMED BITE CHECK ON APU, FOUND FAULT CODED 49-41011. FOUND NO IGNITION AT EXCITOR UNIT. R & R APU EXCITOR REF MM 49-41-31. OPS CHECKS NORMAL. GROUND VERIFICATION CHECKS NORMAL.SDR HALA2014062200090Igniter · inoperativeAUTO SHUTDOWN OF APU, AFTER FUELING WAS COMPLETED, THREE START ATTEMPTS. REPLACED BOTH IGNITORS AND LEADS IAW AMM 49-41. APU STARTS NORMAL.SDR USAA2014061300002O-Ring · leakingAN OIL SMELL AT GATE. FOUND A SMOKING BAGGAGE CART ADJACENT TO AFT CARGO DOOR. CLOSED DOOR & SMELL DISSIPATED. TOOK OFF & SMELL RETURNED BRIEFLY BUT WENT AWAY FOR THE REST OF THE FLIGHT. ON DESCENT, SMELL RETURNED FROM BOTH APU & ENG BLEED SOURCE. COMPLIESDR ASAA2014061008146Warning Light · false activationAPU FAULT LIGHT, AMBER, ON GROUND. TURNED OFF AND FAULT LIGHT WENT OUT WITHIN 5 MINUTES. ACFT GROUNDED. STARTED SECOND TIME. NORMAL START. OPS NORMAL.SDR USAA2014061200007O-Ring · leakingCREW REPORTED A STRONG CABIN ODOR WHILE ON TAXI-OUT & THROUGH CLOUDS ON CLIMB OUT. ODOR DISSIPATED AT CRUISE & RETURNED ON DESCENT, WORSE IN THE CLOUDS & CLEANED UP BEFORE LANDING. R & R APU STARTER O RING IAW MM 49-42-51 & WASHED APU. OPERATIONS GOOD NO LEASDR ASAA2014060508091Igniter · failedAPU FAULT LIGHT ILLUMINATED. ACFT GROUNDED. VERIFIED FAULT LIGHT IAW FIM TASK 802. NO IGNITION. REPLACED APU IGNITOR PLUG, LEAD, & IGNITION UNIT REF TASK 49-41-31-000-801, 49-41-51-000-801, 49-41-31-400-801 & 49-41-51-400-801. ACCOMPLISHED APU STARTING ANDSDR ASAA2014060208024Starter Gen · failedAPU "MAINT" LIGHT ILLUMINATED. ACFT GROUNDED. REPLACED APU STARTER GENERATOR IAW MM 49-41-21-000-801 & INSTALLED MM 49-41-21-400-801. APU START & OPS NORMAL. IAW FIM 49-40-806 APU "MAINT" LIGHT FAULT IS CLEARED. GROUND VERIFICATION SUCCESSFUL.SDR UIEA2014051800199Exciter · inoperativeAPU INOPERATIVE, NO IGNITION. R & R APU IGN MODULE & EXCITER IAW AMM 49-41-03, APU OPERATIONS CHECKED NORMAL.SDR FDEA201405151042Starter · failedAFTER APU STARTED ON PREFLIGHT, LEVEL 1 ALERT APU STARTER FAULT. APU INOPERATIVE EXTERNAL POWER REQUIRED FOR ENGINE START. STARTER RELAY WILL NOT DE-ENERGIZE. INSPECTED APU COMPARTMENT NO DAMAGE NOTED OTHER THAN STARTER & LEAD. R & R APU STARTER RELAY IAWSDR UIEA2014051300179Igniter · wornAPU IGNITER PLUG REQUIRED REPLACEMENT DUE TO WEAR. R & R APU IGNITER PLUG IAW AMM 49-41-02.SDR ASAA2014051107770Igniter · faultedAPU FAULT LIGHT ILLUMINATED DURING START. ACFT GROUNDED. REPLACED IGNITER PLUG, IGNITER PLUG LEAD AND IGNITION UNIT REF AMM 49-41-51, AMM 49-41-52 & AMM 49-41-31. OPS CHECKED GOOD.SDR DALA14029029218Starter · overheatedFLIGHT CREW REPORTED ELECTRICAL ODOR IN COCKPIT. MAINTENANCE TROUBLESHOT AND FOUND APU STARTER OVERHEATED. REPLACED RELAY 52-63 AS A PRECAUTION. R & R COALESCER BAGS. OPS CHECKED GOOD.SDR ASAA2014050607705Nozzle · malfunctionedAPU CT5ATP EGT DATA SHOWS EGT IS TRENDING TOWARDS ESTABLISHED THRESHOLD. ACFT GROUNDED. REPLACED 10 EA APU FUEL NOZZLES AND SHROUD IAW: MM 49-31-14-400-801, STEP F 1, A THROUGH G. ACCOMPLISHED STEP G: FUEL NOZZLE INSTALLATION TEST IAW MM 49-31-14-400-801. NOSDR UIEA2014050500163Charger · failedAPU CANNOT USE BATTERY START. R & R APU BATTERY CHARGER IAW AMM 24-31-05.SDR CALA2014043090919Starter · faultedAPU FAULT ON START UP. R & R APU STARTER MOTOR IAW AMM 49-41-0. ALSO REPLACED APU CRANK CONTACTOR RELAY IAW AMM 49-41-05. APU START & OPERATION ALL NORMAL.SDR ASAA2014041807512Igniter · failedAPU WILL NOT START AS REPORTED BY FLT CREW. ACFT GROUNDED. REPLACED APU IGNITOR PLUG & IGNITION UNIT IAW AMM 49-41-51-000-801, 49-41-51-400-801, 49-41-31-000-801 & 49-41-31-400-801. APU START NORMAL.SDR CALA2014041490816Igniter · faultyECAM MSG APU AUTO SHUTDOWN DISPLAYED ON UPPER ECAM SCREEN, APU. APU AUTO SHUTDOWN ON TWO ATTEMPTED STARTS. PLACED ON MEL 49-10B. SHOWS IGNITION & FUEL CONTROL FAULT. TROUBLE SHOT APU TO PLUGS IAW THE MX MSG. R & R APU IGNITER PLUGS IAW AMM 49-41-41.SDR CA140328004Apu · malfunctioned(CAN) ACFT EXPERIENCED AN APU UN-COMMANDED START IN THE HANGAR THAT COULD NOT BE STOPPED THE NORMAL WAY. BOTH MAIN BATTERIES CONNECTED BUT NOT TURNED ON. ACFT ELECTRICAL SYSTEM WAS POWERED WITH EXTERNAL POWER ONLY. HEARD THE APU SPOOLING UP UN-COMMANDEDSDR ASAA2014032407312Exciter · failedAPU WILL NOT START. ACFT GROUNDED. R & R THE APU EXCITER AND IGNITER PLUG IAW AMM 49-41-31 AND 49-41-51. OPS CHECK GOOD.SDR UIEA2014032000123Starter · inoperativeAPU WOULD NOT START ON THE GROUND. R & R APU STARTER IAW AMM 49-41-01/401, OPERATIONS CHECKED NORMAL.SDR ASAA2014030707114Exciter · failedAPU FAULT LIGHT ILLUMINATED DURING START. TURNED APU SWITCH OFF. ACFT GROUNDED. ACCOMPLISHED FIM TASK 49-40, TASK 801. NO WIRING FUALTS FOUND. R & R IGNITION UNIT. OPS CHECKED GOOD IAW AMM 49-41-31.SDR UIEA2014021300061Igniter · erodedAPU IGNITER PLUG ERODED BEYOND LIMITS. R & R APU IGNITER PLUG IAW AMM 49-41-02. OPERATIONS CHECKED NORMAL.SDR UIEA2014021300062Relay · failedAPU HEALTH CHECK FAILS STEP 5 D OF EO 6749A003, NO 28V DC AT TERMINAL X1. R & R APU START RELAY K197 IAW EO 6749A003 & AMM 49-41-11.SDR CA140217022Starter · failed(CAN) TSB REPORT FEBRUARY 17, 2014, OPERATOR HAD COMPLETED THE APU START, WHEN CREW NOTICED HIGH EGT AND RAMP REPORTED SMOKES AND FLAMES COMING FROM THE APU. THE CREW SHUT THE APU DOWN AND PERFORMED THE APPROPRIATE CHECK LIST. ALL FIRE MESSAGES WENT OUT. RASDR ASAA2014020106743Exciter · failedAPU DID NOT START, FAULT LIGHT ILLUMINATED. ACFT GROUNDED. R & R IGNITION UNIT. APU OPS CHECKED NORMAL IAW AMM 49-41-31.SDR ASAA2014013106742Igniter · failedAPU FAULT LIGHT ILLUMINATED AFTER FAILED START ATTEMPT. ACFT GROUNDED. R & R IGNITER PLUG, IGNITER LEAD, AND IGNITION UNIT, REF AMM 49-41-51, 49-41-52 AND 49-41-31. APU OP'S CHECKED NORMAL. NO ISSUES.SDR ASAA2014013006741Circuit Breaker · failedDURING TAXI IN, APU START UNSUCCESSFUL, APU FAULT LIGHT, LOW OIL PRESSURE LIGHT ILLUMINATED, MAINTENANCE MESSAGE 49-41247. ACFT GROUNDED. R & R AUX POWER BREAKER, C803. OPS CHECKED GOOD IAW WDM 49-11-11.SDR ASAA2014013006740Ignition Unit · failedAPU FAULT LIGHT ILLUMINATED TWO ATTEMPS. ACFT GROUNDED. PERFORMED FIM TASK 49-40, TASK 802, FOUND IGNITION UNIT BAD. R & R IGNITION UNIT REF AMM 49-41-31. APU OPS CHECKED GOOD. CLEARED MEL 49-1B, REMOVED PLACARD C/N 0130006, NO S/P, SEAM C.SDR ASAA2014012112449Converter · faultedDURING APU START, MAINTENANCE LIGHT ILLUMINATED, AFTER SHUTDOWN, FAULT LIGHT ILLUMINATED. ACFT GROUNDED. PERFORMED BITE CHECK APU CDU, FOUND FAULT CODE 49-41244 LOGGED, START CONVERTER SHOWS FAILED GENERATOR DIODE-FAULT ISOLATION. PERFORMED FIM TASK 49-40-SDR ASAA2014011112370Apu · malfunctionedAPU START SWITCH TO STRT EGT BEGAN TO RISE THEN APU FAULT LIGHT ILLUMINATED AND APU SHUTDOWN. ACFT GROUNDED. ACCOMPLISHED BITE CHECK, VERIFIED IN FAULT HISTORY MAINT MSG 49-41012. NO APU ROTATION SHUTDOWN. INSPECTED MAGNETIC DRAIN PLUG, NO CONTAMINATION NOTSDR ASAA2014010612337Exciter · failedAPU FAILS TO START, NO FLAME MAINTENANCE MESSAGE 49-41011. ACFT GROUNDED. REPLACED EXCITER, IGNITER PLUG LEAD AND IGNITION PLUG IAW AMM 49-41-31, AMM 49-41-52 AND AMM 49-41-51. OPS CHECK APU, NORMAL. CURRENT STATUS SHOW NO FAULT.SDR CALA2013122793977Starter · faultyAPU INOPERATIVE 2 ATTEMPTS. SHOWS STARTER ON BITE CHECK. INSPECTED STARTER & FOUND BURNED OUT NEEDS MR49408. REPLACED APU STARTER MOTOR IAW AMM-49-41-01, OPERATIONS CHECKED OK.SDR CALA2013122693931Ignition Unit · faultyECAM MESSAGE APU AUTO SHUTDOWN DISPLAYED ON UPPER ECAM SCREEN. AUTO SHUTDOWN TWICE. R & R APU IGNITION UNIT, OPERATIONS CHECKED GOOD.SDR CALA2013122093830Starter · faultyAPU WON’T START AFTER 2ND ATTEMPT. TRIED CYCLING THE APU CONTROL BREAKERS, NO HELP. INLET DOOR STUCK IN THE PARTIALLY OPEN POSITION & APU IS INOPERATIVE. IAW MEL CB L41 & L42 OPENED & TAGGED. ACCOMPLISHED TSM 49-00-00-810-899 -A REPLACED APU MOTOR STARTER ISDR CALA2013121293619Starter · faultyAPU CONTROL STATUS MESSAGE. REPLACED APU STARTER MOTOR IAW MM. FOUR GOOD STARTS, NO MESSAGES.SDR CALA2013120993532Starter · inoperativeSTATUS APU CONTROL, MX MESSAGE 49-10760. ELECTRIC STARTER INOPERATIVE. APU WILL START BY AIR, APU USEABLE.SDR ASAA2013120696651Exciter · failedFAULT LIGHT ILLUMINATED WHEN WE TRY TO START APU. ACFT GROUNDED. REPLACED APU IGN UNIT REF AMM TASK 49-41-31/401. RAN APU 3 TIMES NO FAULTS NOTED.SDR ASAA2013120596638Igniter · failedAPU FAILED TO START ON LANDING APU FAULT LIGHT ILLUMINATED. ACFT GROUNDED. REPLACED APU IGNITER PLUG REF MM 49-41-51. OPS CHECK GOOD, ACCOMPLISHED APU BITE CHECK, NO FAULTS NOTED.SDR CALA2013120593495Clutch · faultyAPU WILL NOT START. BOTH ENG GEN OPERATES NORMALLY. HYD MOTOR GEN VERIFIED IAW 24-25-00-501. APU INTAKE DOOR IS CLOSED. GND PNEUMATIC SOURCE FOR ENG START USED AT GVA. STARTER ROTATING AT APU START BUT RPM NOT RISING ON EICAS. APU STARTER REMOVED & NO DAMSDR CALA2013120393399Ignition Lead · faultyAPU AUTO SHUT DOWN WITH FAULT LIGHT. R & R IGNITION UNIT & LEADS IAW AMM 49-41-38 & 49-41-31, OPERATIONS CHECKED GOOD.SDR ASAA2013112396505Exciter · failedFLT CREW REPORTS FAULT LIGHT ILLUMINATED ON APU START. ACFT GROUNDED. REPLACED STARTER IGNITION UNIT IAW AMM 49-41-31.
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