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 CALA2013112193181Starter · failedTHREE FAILED APU ATTEMPTS. APU CONTROL UNIT SHOWING MINI FLAG 35, STARTER FAILED. R & R APU STARTER IAW AMM, STARTED APU TWICE, STARTS NORMAL.SDR CALA2013111993053Igniter · faultyAPU FAILED TO START AFTER LANDING. FOUND NO FLAME ON CFDS. REPLACED IGNITER PLUGS IAW AMM 49-41-41. ACCOMPLISHED OPERATION TEST OF APU IAW AMM 49-00-00, TESTED OK.SDR CALA2013111993041Spring · brokenRETURN SPRING IN APU START SWITCH IS BROKEN. REPLACED SWITCH SPRING FUNCTION & OPERATIONS CHECKED GOOD.SDR ASAA2013111596409Starter Gen · crackedM/C REPORTS THE APU OIL CONSUMPTION HAS SPIKED. ACFT GROUNDED. TROUBLESHOT AND FOUND APU OIL LEAKING FROM CRACKED STARTER GENERATOR HSG REF FIM 49-90-00-810-813. REPLACED APU STARTER-GENERATOR REF AMM 49-41-21-000-801 AND AMM 49-41-21-400-801. OPS CHECK APU NSDR REXA2013110802251Starter · failedAIR CREW REPORTED, APU HIGH EGT, RPM 6-7, FLAME ERUPTED OUT OF TAIL PIPE. R & R APU STARTER IAW AMM 49-41-07. OP CHECKED GOOD.SDR ASAA2013110296282Warning Light · illuminatedAPU FAULT LIGHT ILLUMINATE ON START ATTEMPT, NO ROTATION. ACFT GROUNDED.SDR CALA2013110592646Ignition Lead · defectiveAPU WILL NOT START, HANGS AT 18% N1. REPLACED IGNITION UNIT IAW MM-49-41-38, NO HELP. REPLACED FUEL CONTROL UNIT FOR TROUBLESHOOTING IAW MM, NO HELP. REPLACED IGNITER PLUGS & LOWER IGNITION LEAD IAW MMS. OPERATIONS CHECKED GOOD.SDR ASAA2013103096261Exciter · failedAPU FAULT LIGHT CAME ON DURING START ON GROUND. QRH ACCOMPLISHED FIVE MINUTES, LIGHT OUT AND RE-START. OPS NORM. ACFT GROUNDED. ACFT GROUNDED. PERFORM APU BITE PROCEDURE REF. FIM TASK 49-60 TASK 801. FOUND FAULT CODE 49-41180 LOGGED. CLEARED FAULT. PERFORMESDR CALA2013102992469Starter · failedAPU AUTO SHUTDOWN AT GATE, UNABLE TO START. REPLACED APU STARTER MOTOR & STARTER MOTOR CLUTCH, OPERATIONS CHECKED GOOD.SDR CALA2013102992464Contactor · faultyAPU WILL NOT START, APU INOPERATIVE. REPLACED CONT BREAKER, REPLACED APU BATTERY, REPLACED APU CONTROLLER 2117342-20, SERIAL OFF = 15, REPLACED APU DOOR ACTUATOR & NO HELP. IAW DF198 FOR APU DOOR MESSAGE. REPLACED APU BATTERY CHARGER 8-930-03, SERIAL OFF = 3SDR ASAA2013102696234Igniter · failedAPU FAILED TO START ON THREE ATTEMPTS. FAULT LIGHT ILLUMINATED WITH MAINT MESSAGE 49-41181, IGNITION UNIT CIRCUIT SHOWS OPEN. CYCLED AUX PWR UNIT CIRCUIT BREAKER. NO HELP. ACFT GROUNDED. REPLACED APU IGNITER PLUG, LEAD, AND APU IGNITION UNIT IAW MM 49-41-5SDR UIEA2013101600523Ecu · faultedAPU NO START ON LANDING. CHECKED OIL LEVEL, CHECK OK, NO OIL ADDED. BITE TEST IAW AMM 49-61-05-742, APU ECU FOUND MULTIPLE FAULTS. CLEARED FAULTS. OPS CHECKED APU. APU CHECKED NORMAL ON GROUND. NO DEFECTS NOTED.SDR CALA2013101692106Starter · faultyAPU FAULT WILL NOT START. LAST 5 STARTS APUC SHOWED START ABORT, 11% N1, BATTERY VOLTAGE DURING CRANK WAS 22 VOLTS DURING MX START ATTEMPT. APU DOOR NOT DISPLAYED. APU, REPLACED STARTER & STARTER CLUTCH ASSEMBLY, OPERATIONAL CHECKED GOOD.SDR CALA2013100991909Counter · malfunctionedREPLACED APU START COUNTER & NOW IT DOUBLE CLICKS EVERY TIME YOU START THE APU.SDR CALA2013100891861Unknown · malfunctionedAPU WON'T START BY ELECTRIC STARTER, OK FOR BY PNEUMATIC. APU USEABLE IAW MEL.SDR CALA2013093091569Ignition Unit · failedAPU START SYSTEM DISPLAYED. BOEING AHM HAS FAULT MESSAGE "49-10700 IGN UNIT IS FAILED".SDR UIEA2013092000505Apu · malfunctionedAPU COLD SOAK START AT FL-400, SAT -59, UNSUCCESSFUL AFTER 2 ATTEMPS. RERACKED APU ECU, OPS TEST NORMAL. IAW AMM 49-11-00.SDR CALA2013083090876Starter · slowAUXILIARY POWER UNIT SHUTDOWN ON PUSHBACK. AUXILIARY POWER UNIT FAULT MAINTENANCE MESSAGE. RESTART GOOD. ACCOMPLISHED SEVERAL SUCCESSFUL AUXILIARY POWER UNIT STARTS. RAN PACKS & STARTED ENGINES. NO AUXILIARY FAULTS OR SHUTDOWNS. REPLACED AUXILIARY POWER SDR CALA2013082890808Exciter · faultyAUXILIARY POWER UNIT WILL NOT START. R & R AUXILIARY POWER UNIT IGNITER BOX. R & R AUXILIARY POWER UNIT PLUGS. R & R AUXILIARY POWER UNIT IGNITER PLUG LEADS, OPERATIONS CHECKED NORMAL.SDR CALA2013081390400Motor · faultyAPU CONTROL APUC DETECTED FAILURE OF REDUNDANT CONTROL FUNCTION OR LOSS OF 1 629 CHANNEL. STATUS MESSAGE APU CONTROL MSG-4910760 ACTIVE TA INTER APU CONTROL MESSAGE FAULT. APU USEABLE. TS IAW FIM 49-40, TASK 807, REPLACED ELEC STARTER MOTOR IAW MM, OP CHECSDR UIEA2013080300429Apu · faultedAPU FAULT ON START, ACCOMPLISHED QRH PROCEDURE, BOTH START ATTEMPTS UNSUCCESSFUL. APU BITE PROCEDURE PERFORMED IAW FIM 49-11 FAULT TREE 958 FIG 105. APU STARTED ON GROUND. AT FIRST ATTEMPT, OPS CHECKED GOOD. APU OK FOR FURTHER SERVICE.SDR UIEA2013072800415Apu · malfunctionedAPU WOULD NOT START AFTER THREE ATTEMPTS, AFTER LANDING. FAULT LIGHT WAS ILLUMINATED. APU BITE PROCEDURE PERFORMED IAW FIM 49-11 FAULT TREE 958, FIG 103. APU STARTED ON GROUND AT FIRST ATTEMPT AND OPS CHECKED GOOD. APU OK FOR FURTHER SERVICE.SDR UALA2013072305175Control Unit · faultyAPU BITE MESSAGE. TROUBLESHOT IAW FIM 49-11-00, R & R ECU, OPS CHECKED NORMAL.SDR UALA2013071204867Unknown · unknownAPU DID NOT START. COULD NOT DUPLICATE PROBLEM.SDR UALA2013071204902Exciter · inoperativeAPU EXCITER BOX INOPERATIVE. R & R EXCITER BOX, OPS CKS GOOD. SN PART INSTALLED 0916250, 402068.SDR HNAA2013071000406Contactor · failedAPU FAILED. CIRCUIT BREAKER N-8 TRIPPED. R & R APU START CONTACTOR. RESET CIRCUIT BREAKER N-8. OPS CHECKED GOOD.SDR UALA2013071204897Switch · failedAPU START SWITCH DOES NOT SPRING RETURN FROM "START" TO "ON". REPLACED APU START SWITCH AND OPS NORMAL.SDR UALA2013062704505Ignition Unit · faultyAPU AT ALTITUDE WILL NOT START. APU HANGS BETWEEN 30 TO 50 PERCENT DURING START. APU STOPS AT 26 PERCENT. THREE ATTEMPTS. APU WILL NOT START TEST ECU SHOW INGNITION FAULT. REPLACED IGNITION UNIT AND APU STARTED SEVERAL TIMES.SDR UALA2013062704481Ignition Unit · inoperativeAPU WILL NOT CRANK ON START. TROUBLESHOT IAW TSM 49-40-00. R & R IGNITION UNIT REF AMM 49-41-38. OPS NORMAL.SDR UALA2013060403869Starter · failedAPU FAULT DURING START. HUNG AT 33 PERCENT AND DIED. REPLACED STARTER IAW MM, OPS CHECKED GOOD.SDR HALA2013052600073Igniter · malfunctionedAPU SHUTDOWN ON START. SYS REPORT SHOWS IGNITOR PLUG (59KA31), IGNITOR EXCITER (59KA10), CLASS 1 FAULT. R & R IGNITOR PLUGS IAW TSM 49-41. RAN APU & OPS CHECK NORMAL.SDR HALA2013052600072Igniter · faultedAPU SHUTDOWN ON START. SYS REPORT SHOWS IGNITOR PLUG (59KA31), IGNITOR EXCITER (59KA10) CLASS 1 FAULT. R & R IGNITOR PLUGS IAW TSM 49-41. RAN APU & OPS CHECK NORMAL.SDR UIEA2013052600298Apu · inoperativeAPU NO START, IGNITION NOT ENERGIZED DURING START SEQUENCE, FUEL OK. TROUBLESHOT IAW FIM 49-11, FAULT TREE 958, FIG 107.SDR UALA2013050603155Starter · inoperativeAPU WILL NOT START, NO ROTATION. NO VOLTAGE DROP OR BATTERY DISCHARGE. REPLACED STARTER, OPS CHECKED GOOD.SDR HALA2013042900049Starter · faultedAPU FAULT DISPLAYED WHEN APU START ATTEMPTED ON FINAL APPROACH. BITE CHECKED ECU BOX. FAULTED APU STARTER. REPLACED APU STARTER IAW AMM 49-41-01. SECURITY AND COND OK. OK FOR SVC.SDR UALA2013043003011Starter · failedAPU WOULD NOT START ON GROUND. RPM WOULD HANGUP AT 20RPM. ACCOMPLISHED FIM 49-61-00 PG110-111. FOUND STARTER FAULTY. CONFIRMED HMG IS OPERATING NORMALLY PER MM 24-25-00-501. REMOVE AND REPLACED APU STARTER IAW AMM, OPS CHECKED OK.SDR UIEA2013042900253Ignition Unit · faultyAPU DID NOT START - FAULT LIGHT ON. (R & R APU IGNITION UNIT IAW AMM 49-41-03. OPS CHECKS GOOD.)SDR HNAA2013042600236Seal · leakingWITH APU RUNNING, WITHOUT GROUND POWER UNIT, ELECTRICAL BURNING ODOR AND SMOKE COMING FROM CARGO BAY / APU AREA. INSPECTED AND FOUND APU STARTEF GENERATOR TO BE THE CAUSE OF SMOKE AND FUMES. NO DAMAGE NOTED. REMOVED APU STARTER GENERATOR AND FOUND OIL SOAKESDR ASAA2013042294584Starter Gen · failedAPU UNABLE TO START AFTER THREE ATTEMPTS. LOW OIL PRESSURE LIGHT ILLUMINATED FOLLOWED BY FAULT LIGHT ON EACH ATTEMPT. REPLACED APU STARTER GENERATOR UNIT IAW AMM 49-41-21 AND APU STARTER POWER UNIT IAW AMM 49-41-41. APU GROUND VERIFICATION TESTS PASS.SDR ASAA2013042194559Starter Gen · failedAPU FAILED TO START AND THE APU FAULT LIGHT ILLUMINATED. REPLACED STARTER GENERATOR IAW AMM 49-41-21-000-801 AND 49-41-21-400-801. R & R START CONVERTER UNIT IAW AMM 49-41-61-000-801 AND 49-41-61-400-801 STARTER APU IAW AMM 49-11-00-860-801. GROUND OPERATIOSDR ASAA2013041594497Converter · faultedFAULT LIGHT ILLUMINATED DURING APU START ATTEMPT AT FLIGHT LEVEL 360. (SUBSIQUENT ATTEMPT AT FL 300 APU STARTED NORMALLY WITH NO FAULT LIGHT) ON ARRIVAL APU FAULT LIGHT NOT ON. ACCOMPLISHED APU BITE TEST, MAINT MSG 49-41010, NO ACCELERATION SHUTDOWN AT LEG 1SDR UALA2013041502535Starter · faultyON APU START UP, WITH BATTERY VOLTAGE AT 31 VOLTS, APU NO LIGHT OFF. NO ROTATION. APUC MESSAGE RPM BELOW 7% AND AUTO SHUT DOWN. NO BATTERY VOLTAGE DROP WHILE CRANKING. REPLACED APU STARTER PER MM. ALSO REPLACED APUC PER MM. APU STARTED ON FIRST ATTEMPT WSDR CA130410012Starter · failed(CAN) AFTER THE PASSENGERS HAD BOARDED THE ACFT, DURING THE STARTING OR SLIGHTLY AFTER THE STARTING OF THE APU, A STATION ATTENDANT NOTICED SMOKE/FLAME COMING FROM THE AREA OF THE APU. THE SMOKE/FLAME WAS REPORTED TO THE CAPTAIN BY A STATION ATTENDANT AND THESDR UALA2013040302203Starter · failedAPU WILL NOT START, APU FADEC SHOWS LRU STARTER FAULT . REPLACED STARTER.SDR UALA2013032001706Exciter · failedAPU NO START. REPLACED EXCITER, LEAD AND IGNITER PLUG. OPS NORMAL.SDR HALA2013031500031Switch · failedTHREE APU ATTEMPTED STARTS FAILED, PON LANDING "APU FAULT" EICAS MESSAGE. REPLACED LOW OIL TEMP SWITCH IAW AMM 49-27-14, FUNCTIONAL AND LEAK CK NORMAL ON GROUND, OK TO CONTINUE, RESERVICED APU OIL TO FULL.SDR ASAA2013030494078Converter · failedAPU WONT START, VERIFIED DISCREPANCY - PERFORMED APU BITE IAW 49-60 TASK 801. FOUND FAULT CODE 49-41254 ACTIVE. START CONVERTER UNIT SHOWS START SYS INOP. PERFORMED 49-40, TASK 821. REMOVED START CONVERTER UNT. INSTALLED NEW SCU IAW 49-41-61. PERFOMED OPSDR DXTA2013030105301Starter Gen · failedDURING PREFLIGHT THE APU WAS STARTED AND THE THE BLEED AIR WAS SELCTED ON. AFTER ABOUT 1MIN THE CABIN BEGAN TO FILL FULL OF SMOKE. BLEED AIR WAS SELECTED OFF AND APU WAS SHUTDOWN. RAN BOTH ENGINES WITH PRESSURE SOURCE SELECTOR IN BOTH, LT, RT AND OFF AND COUSDR UALA2013021200848Igniter · faultyAPU START SYS STATUS MSG. MX MSG 49-10690 IGNITION CLUSTER HIGH VOLTAGE CIRCUIT IS OPEN. DF PER MEL. INF- :REF: FIM 49-40 & PERFORM TASK 805. RPL NR 2 IGNITOR PLUG REF AMM, ALSO REPLACED IGNITION UNIT AS PRECAUTIONARY & NR 1 IGNITION LEAD, STARTED APU 3 TISDR ASAA2013021093855Starter Gen · malfunctionedAPU MX LIGHT ILLUMINATED. CHECKED CDU FOUND APU LOW OIL FAULT 49-91227. SERVICED APU TO FULL 1QT. FOUND APU OIL LEAK ONE DROP PER. ALSO FOUND FWD INBD BOWL INDICATION PIN POPPED SHOWING RED. REPLACED STARTER GENERATOR FILTER AND LUBE FILTER, AND RESET DE
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