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 ASAA2022071439096Converter · faultyAPU FAULT LIGHT ILLUMINATED ON START ATTEMPT. GROUNDED - YES. REMOVED & REPLACED APU STARTER CONVERTER REF B737-9 AMM 49-41-21.SDR ASAA2022070338915Converter · failedAPU FAULT LIGHT DURING 2 APU START ATTEMPTS ON THE GROUND AFTER LANDING. GROUNDED - YES. PERFORMED B737-9 IFIM 31-00-00-810-803 FOUND FAULT 49-41254 START CONVERTER UNIT FAULT. REF APU BITE REF B737-9 AMM 49-61-00-700-801 PERFORMED IFIM 49-40-00-810-818. PER FSDR ASAA2022062638853Apu · faultyAPU FAULT LIGHT ON INITIAL START AT GATE. GROUNDED - YES. C/W B737-800 FIM 49-40- TASK 803. APU DID NOT START FAULT LIGHT CAME ON. PERFORMED BIT TEST FOUND MAINTENANCE MESSAGE 49-41012, RELEASED PER MEL 49-1B. VERIFIED NO HEAT DAMAGE OR DELAMINATION ON TAIL COSDR ASAA2022062038715Starter Unit · reads lowAPU FAULT LIGHT CAME ON DURING START USING BATTERY. GROUNDED - YES. PER B737-900 FIM 49-60 TASK 801, 819, 822 APU FAULT HISTORY HAD MULTIPLE HITS OF 49-41249 START CONVERTER UNIT SHOWS LOW BATTERY POWER. MAINTENANCE HISTORY PAGE HAD MULTIPLE HITS OF 49-41297 SSDR ASAA2022060938687Converter · faultyAPU FAULT LIGHT ON START UP APU DOES NOT START. GROUNDED - YES. CONFIRMED FAULT, APU WILL NOT START. REMOVED & REPLACED APU (SCU) START CONVERTER UNIT PER B737-800 AMM 49-41-61. ACCOMPLISHED APU BITE PROCEDURE PER AMM 49-61-00-700-801, OPS CK NML. ALSO, STARTESDR SWAA2022060614342Coalescer Bag · smokeSMOKE FROM PACKS ON APU. APU TRIPPED OFF BUSSES. FIRE HANDLE PULLED; BOTTLE DISCHARGED. ACRID SMELL IN COCKPIT + THROUGHOUT CABIN. HAZE VISIBLE FROM FORWARD. CABIN. / [01] PERFORMED APU GENERATOR OPS AND LEAK CHECK PER AMM 49-41-21. OPS CHECK GOOD.SDR SWAA2022060615635Generator · smokeSMOKE FROM PACKS ON APU. APU TRIPPED OFF BUSSES. FIRE HANDLE PULLED; BOTTLE DISCHARGED. ACRID SMELL IN COCKPIT + THROUGHOUT CABIN. HAZE VISIBLE FROM FORWARD. CABIN. / [01] PERFORMED APU GENERATOR OPS AND LEAK CHECK PER AMM 49-41-21. OPS CHECK GOOD.SDR SWAA2022060615636Feeder Cable · smokeSMOKE FROM PACKS ON APU. APU TRIPPED OFF BUSSES. FIRE HANDLE PULLED; BOTTLE DISCHARGED. ACRID SMELL IN COCKPIT + THROUGHOUT CABIN. HAZE VISIBLE FROM FORWARD. CABIN. / [01] PERFORMED APU GENERATOR OPS AND LEAK CHECK PER AMM 49-41-21. OPS CHECK GOOD.SDR SWAA2022060615637Fire Bottle · smokeSMOKE FROM PACKS ON APU. APU TRIPPED OFF BUSSES. FIRE HANDLE PULLED; BOTTLE DISCHARGED. ACRID SMELL IN COCKPIT + THROUGHOUT CABIN. HAZE VISIBLE FROM FORWARD. CABIN. / [01] PERFORMED APU GENERATOR OPS AND LEAK CHECK PER AMM 49-41-21. OPS CHECK GOOD.SDR ASAA2022052938531Apu · sluggishAPU NO START FAULT LIGHT. GROUNDED - YES. APU FIRST START ATTEMPT SUCCESS, SECOND ATTEMPT FAILED. STARTED FEW MORE TIMES WITH NO FAILURES. NOTED WHENEVER WE HAD A SUCCESSFUL START, APU TOOK A LONGER TO ENGAGE SGU BUT <20 SECS. REF CMM 49-26-93 REMOVED TRANSDUCSDR ASAA2022052638487Converter · faultyAPU INOP UPON LANDING MULTIPLE STARTS ATTEMPTED APU FAULT CODE ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED STARTER CONVERTOR UNIT PER B737-800 AMM 49-41-61-000-801/AMM 49-41-61-400-801. ACCOMP 2 STARTS THEN P91 A11 CIRCUIT BREAKER TRIPPED. REMOVED AND RESDR YENA2022052000509Apu · odorFLT#1079, LAS-LAX. ' DIRTY SOCK SMELL ( APU BLEED AIR SUPPLY SYSTEM ) DIRTY SOCK SMELL REPORTED BY INFLIGHT IN REAR OF CABIN DURING INITIAL DESCENT AND FINAL APPROACH.' (SUPPLEMENTAL TO FOLLOW).SDR DALA2022051703377Cable · burnedSHIP 8135 - FIRE EVENT - DURING PRE-FLIGHT INSPECTION, CAPTAIN NOTICED THE APU WAS NOT RUNNING. F/O REPORTED THE APU FIRE LIGHT ILLUMINATED WITH NO BELLS OR WARNING. F/O PUSHED THE APU FIRE PBA AND THE LIGHT EXTINGUISHED. HE DID NOT PUSH THE BOTTLE DISCHARGE BSDR YENA2022052000504Apu · fault messageFLT#680, MKE-JFK. 'APU FAULT ON LANDING; RESET APU AW AND STARTED APU. APU START NORMAL TEMPS ETX PER MM 49-40-00 MSG CLEARED. OK TO CONTINUE IN SERVICE.'SDR ASAA2022051138263Igniter · fouledAPU FAULT LT ON AFTER LANDING. RAN QRH AND APU FAULT LT ON AGAIN AFTER SECOND ATTEMPT. GROUNDED - YES. FOUND FAULT CODE 49-41011. ACCOMPLISHED B737-800 FIM 49-40 TASK 802. FOUND FOULED IGNITOR PLUG. REMOVED AND REPLACED IGNITOR PLUG AND LEAD PER B737-800 AMM 4SDR ASAA2022042638138Ignition Unit · faultyAPU FAULT LIGHT DURING START AFTER LANDING. GROUNDED - YES. REPLACED IGNITOR LEAD PER B737-900 AMM 49-41-52 AND IGNITION UNIT PER AMM 49-41-31, OPS CHECK GOOD NO FAULTS/DEFECTS NOTED.SDR ASAA2022042538126Exciter · faultyAFTER LANDING WHEN ATTEMPTING TO START THE APU THE APU FAULT LIGHT ILLUMINATED . GROUNDED - YES. REPLACED APU IGNITION EXCITER BOX. REF B737-800 AMM 49-41-31. APU OPS NORMAL.SDR AALA202204279941Starter · leakingAIRCRAFT WAS GROUNDED: A DIRTY SOCK SMELL WAS REPORTED DURING THE BOARDING PROCESS, TAXING OUT AND MID WAY THRU THE FLIGHT. **SUPPLEMENTAL REPORT FOR AALA202204259941: MAINTENANCE FOUND THE APU STARTER LEAKING OIL AND REPLACED IT PER AMM 49-42-51 ** (CLOSED)SDR YENA2022041900382None · noneFLT#2103, JFK-SJU. (AIRCRAFT PERFORMED AN AIR TURN BACK TO JFK). 'APU AUTO-SHUTDOWN IN CRUISE FL 330; STARTED APU NORMALLY. NO DEFECTS AT THIS TIME. OPS CHECK GOOD. REF TO AMM 49-00-00.'SDR ASAA2022032937879None · faultyAPU FAIL TO START ON BATTERY GROUNDED - YES. APU "LOW BATTERY VOLTAGE FAIL TO START" MESSAGE 49-41249 ON 17 FAILED STARTS. PERFORMED B737-900 FIM 49-40 TASK 822, PER FIM REMOVED AND REPLACED APU START POWER UNIT REF B737-900 AMM 49-41-71/401. OP CHECK NORMAL.SDR ASAA2022031537720Ecu · faultyAPU "MAINT" LIGHT ILLUMINATED AND STAYED ON WHEN APU WAS STARTED AFTER LANDING. APU OPERATED NORMAL. GROUNDED - YES. REMOVED AND REPLACED APU ECU IAW B737-900 AMM 49-61-12. OPS CK NORMAL. CSSP OK ON 3/27.SDR HALA2022031400075None · noneETOPS - APU FAULT- IT WOULD NOT START DURING APPROACH- 2 ATTEMP WERE TRIED// T/S PER A330 TSM 49-41-00-810-812-A FOUND NO FLAME IGNITION PLUG (59KA31)/ IGNITION EXCITER (59KA10). R/R BOTH IGNITER PLUGS PER A330 AMM 49-41-41. TESTS GOOD. OK FOR SVCSDR HALA2022030400067None · noneETOPS - APU WILL NOT START // REMOVED AND REPLACED EXCITER-IGNITION PER AMM 49-41-38 OPS TEST OK. OK FOR SERVICESDR ASAA2022012637299Exciter · failedAFTER LANDING "APU FAULT LIGHT" ILLUMINATED DURING START ATTEMPT. GROUNDED - YES. T/S CODE 49-41011, REPLACED EXCITER, IGNITION UNIT IN REF TO B737-900 AMM 49-41-31. PERFORMED 2 SUCCESSFUL STARTS OPS CHECKED GOOD. GROUND VERIFICATION GOOD.SDR ASAA2022011537189Converter · faultyAPU FAULT LT ILLUMINATED. GROUNDED - YES. REMOVED AND INSTALLED NEW SCU PER B737-800 AMM 49-41-61/401, OPS NORMAL. REMOVED AND INSTALLED NEW SPU PER AMM 49-41-71/401, OPS NORMAL, NO FAULTS FOUND. PER TECH SVC REQUEST DUE TO HISTORY REPLACED APU ENGINE HARNESS SDR ASAA2022011137171Exciter · inoperativeAPU QUIT AND TURNED FELL OFF. GROUNDED - YES. PER TECH SERVICES VERIFIED FAULT 49-41181 SHOW FROM STARTS 4 THRU 8. REMOVED PRECAUTIONARY AND REPLACED APU IGN PLUG AND APU IGN UNIT REF B737-800 AMM 49-41-31 AND 49-41-51 OPS TEST GOOD.SDR DXTA2022010654810Manifold · leakingAPU BLEED AIR: AFTER APU START, WHEN THE BLEED AIR WAS SELECTED ON, THE CABIN FILLED WITH A STRONG EXHAUST/FUEL SMELL. REMOVED APU ACCESS PANEL AND INSPECTED INTERIOR OF APU BOX FOR EVIDENCE OF OIL OR FUEL LEAKAGE. NO EVIDENCE OF OIL LEAKS PRESENT STARTED APSDR ASAA2022010337086None · noneAPU FAILED TO START. TWO ATTEMPTS. NO EGT RISE AND FAULT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED APU ECU REF B737-800 AMM 49-61-12 OPS CHECK GOOD.SDR ASAA2022010137069Sensor · shortedAPU WONT START, FAULT LIGHT ON AFTER START ATTEMPT. GROUNDED - YES. PERFORMED BITE TEST AND FOUND MAINT MSG 49-61223. "INLET TEMPERATURE SENSOR SHOWS SHORT CIRCUIT". T/S TO INLET TEMP SENSOR IAW B737-800 FIM 49-60 TAK 812. REPLACED INLET TEMP SENSOR IN REF TO SDR ASAA2021122437003Unknown · unknownPILOT REPORTS APU FAILED TO START, MULTIPLE ATTEMPTS ON GROUND. GROUNDED - YES. PERFORMED APU BITE TEST FOUND MAINTENANCE MESSAGE "NO APU ROTATION SHUTDOWN" OCCURRED SEVERAL TIMES IN LAST 65 STARTS. NO OTHER FAULTS FOUND. SUSPECT STARTER TO BE INTERMITTENT. RESDR ASAA2021121436895Unknown · unknownAPU FAULT LIGHT ILLUMINATED AND APU DID NOT START. GROUNDED - YES. CW B737-800 FIM 49-40 TASK 803 APU CHIP DETECTOR HAD NO METAL, BATTERY VOLTAGE IS GOOD AND APU ROTATES FREELY. STARTED APU SEVERAL TIMES WITH NO DEFECTS NOTED.SDR DALA2021121307662None · noneSHIP 5641 FOUND APU BATTERY CONNECTOR BURNT. CORRECTIVE ACTION: REMOVED AND REPLACED APU BATTERY CONNECTOR PER BSWPM 20-30-11. (8347393)SDR ASAA2021120236803Converter · inoperativeON TAXI IN APU FAILED TO START. GROUNDED - YES. REMOVED AND REPLACED APU STARTER CONVERTER UNIT PER B737-900 AMM 49-41-61 PB400. OPS CHECK PASSED.ETOPS GROUND VERIFICATION SUCCESSFUL.SDR ASAA2021120236802Converter · inoperativeCSS REQUESTED: APU FAILED TO START 3 TIMES ALL AT F2400. GROUNDED - YES. REF TO LOG PAGE 60234860, REMOVED AND REPLACED APU STARTER CONVERTER UNIT PER B737-900 AMM 49-41-61 PB400. OPS CHECK PASSED. ETOPS GROUND VERIFICATION SUCCESSFUL.SDR ASAA2021112736737Unknown · unknownAPU WOULD NOT START AND THE FAULT LIGHT ILLUMINATED. GROUNDED - YES. ACCOMPLISHED ON BOARD APU MAINT BITE CHECK NO FAULT NOTED NO RECENT HISTORY (TRAX). INTERROGATED FAULT HISTORY FOUND MSG 49-41012 NOT ACTIVE AND MSG 49-41254 NOT ACTIVE BOTH FAULTS INDICATE ISDR ASAA2021112736736Converter · faultyAFTER LANDING, APU FAILED TO START. APU FAULT ILLUMINATED. GROUNDED - YES. FOUND FAULT 49-41254 ACTIVE BEFORE START SUCCESSFUL. FOUND FAULT 49-41012 REPEAT INSTANCES. CW B737-9 IFIM 49-40-00-810-805 AND 49-40-00-810-818. REMOVED AND REPLACED START CONVERTER UNSDR HALA2021112200168None · noneETOPS - APU SHUTDOWN PRIOR TO A/C REPOSITIONING // PERFORMED TSM 49-00-81-810-825-A NEED TO REPLACE IGNITION EXCITER PER PARAGRAGH 4A2A REMOVED AND REPLACED IGNITION EXCITER PER AMM 49-41-38. ALL CHECKS GOOD.SDR AC2A202111159201Accumulator · leakingAPU START ACCUMULATOR IS LEAKING HYDRAULIC FLUID AT VENT/DUMP VALVESDR ASAA2021111336620Converter · faultyAPU "FAULT" CAUTION LIGHT DURING GROUND START. GROUNDED - YES. REMOVED AND REPLACED THE APU START CONVERTER UNIT. OPS CHECK GOOD. REF AMM 49-41-61-400-801. THIS CLEARS MEL 49-1B. PLACARDS REMOVED SEAMC FELIX NOTIFIED.SDR AALA202111052656Converter · odorAIRCRAFT WAS GROUNDED: ON APPROACH, VERY STRONG ELECTRICAL SMELL AT 2500 FEET SMELL WHEN AIII SELECTED WITH GEAR DOWN FLAPS 15 SMELL REMAINED STRONG THROUGH LANDING AND TAXI TO GATE AUXILIARY POWER UNIT WAS OFF. FOUND AUXILIARY POWER UNIT START CONVERTER UNIT SDR AALA202110255943Mount · leakingAIRCRAFT WAS GROUNDED: FUMES EVENT AT CRUISE. MAINTENANCE FOUND THE PACKINGS ON THE APU OIL HEATER (AALA202110252331) AND THE APU STARTER MOTOR MOUNT(AALA202110255943) LEAKING AND REPLACED THEM PER AMM 49-96-51 AND AMM 49-42-51. A SATISFACTORY LEAK / OPERATIONSDR QXEA2021102100483Apu · faulted2 UNSUCCESSFUL APU STARTS. ON SECOND ATTEMPT, STRONG ODOR OF JET FUEL IN CABIN. PLACED APU ON MEL.SDR HALA2021101500138None · noneETOPS - APU AUTO SHUTDOWN // REMOVED AND REPLACED EXCITER-IGNITION PER AMM 49-41-38 OPS CHECK GOOD. NO FAULTS NOTED.SDR ASAA2021093036154Unknown · unknownAFTER LANDING ATTEMPTED APU START - LOW OIL PRESS LIGHT ILLUMINATED AND NO START. GROUNDED - YES. PERFORMED BITE CHECK. NO FAULT NOTED. PERFORMED APU OPS TEST PER B737-800 AMM 49-11-00 OPS TEST NORMAL. A/C RELEASED PER MEL 49-99A. PER SEAMC, CSS PASS. CLEARS MSDR UIEA2021100102155Switch · intermittentAPU FAULT 3 ATTEMPTS WILL NOT START. CYCLED BATTERY SWITCH. APU STARTED FIRST ATTEMP. NO DEFECTS NOTED IAW B767AMM 49-11-00. OPS CKS GOOD.&NBSPSDR ASAA2021092736124Power Unit · faultyLOW BATTERY POWER MSG. APU WILL NOT START. A/C CONNECTS WITH GROUND POWER. GROUNDED - YES. REPLACED START POWER UNIT PER B737-900 FIM 49-40 TASK 822 STEP F. (5) & B737-900 AMM 49-41-71. PERFORMED TWO SUCCESSFUL BATTERY STARTS. MAIN BATTERY VOLTAGE NEVER DROPPESDR UIEA2021093002150Apu · failedAPU FAULT, 3 ATTEMPTS TO START UNSUCCESSFUL APU ECU INTERROGATED AND NO FAULTS. APU SUCCESSFULLY STARTED IAW AMM 49-11-00. OK FOR SERVICE.SDR UIEA2021092202073Apu · overservicedAPU AUTO SHUTDOWN AFTER PUSH BACK. RESTARTED APU AND RAN FOR 3 MIN THEN SHUT DOWN AGAIN. RETURN TO GATE.(<P>FOUND APU OIL OVER SVCD. PROPERLY SVCD APU IAW AMM 12-13-04. VERIFIED PROPER OIL SVC. PERFORMED FIM 49-11 FT 958. NO FAULTS NOTED. SYSTEM SATISFACTORY. SDR NACA2021091900001None · noneDISCREPANCY: APU SHUTDOWN WITH FAULT LIGHT ON BLOCK IN MIA. CORRECTIVE ACTION: PERFORMED APU BITE TEST ON CONTROL SYSTEM, CHECK GOOD APU START OK IAW AMM 49-01-05SDR NACA2021091800001None · noneDISCREPANCY: DURING PDSC, HAD 2 APU ABORTED STARTS. HAD NORMAL ROTATION BUT COULD NOT HEAR IGNITION. CORRECTIVE ACTION: REPLACED APU IGNITION EXCITER IAW AMM 49-41-03, OPS CHECK GOOD.
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