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 UIEA2020031600467Ignition Unit · faultyAPU DID NOT START, 5 ATTEMPTS, FL 400, FL 350, FL 300, FL 250 & FL 170. OIL LEAK OBSERVED AFTER FLIGHT.(<P>IGNITION UNIT WAS REPLACED AND TEST WAS PERFORMED IAW AMM 49-41-03-404-010. OPS CHK GOOD.<BR /></P>)SDR A6WA2020022847208Igniter · failedSTRONG FUEL SMELL IN COCKPIT& CABIN AFTER STARTING APU. R&R EXCITER PER AMM 49-41-01-000-801, OPS CHECK GOOD. R&R BOTH APU IGNITORS PER AMM 49-41-05-000-801, OPS CHECK GOOD. SN OFF:1366J SN ON:J11060014 SDR UIEA2020022600327Starter · failedAPU FAULT ATTEMPTED 2 TIMES.(<P>DEFERRED PER DDG 49-11-01A, MDDR 125062.</P><P>LP 1171707: REMOVED AND REPLACED APU STARTER IAW AMM 49-41-01. OPS CHECK GOOD. NO FAULTS NOTED. THIS CLEARS DMI 125602. PLACARD REMOVED.<BR /></P>)SDR ASAA2020030232288Unknown · malfunctionedAPU FAILED START AT FL 370, 370, 380 WITH FAULT LIGHT. FAULT EXTINGUISHED IMMEDIATELY AFTER FIRST ATTEMPT AND SWITCHED OFF. FAULT LIGHT EXTINGUISHED AFTER 5 MINUTES AFTER 2ND AND 3RD ATTEMPTS. EGT REACHED 950 EACH ATTEMPT. GROUNDED - YES. ON DEFERRAL.SDR UIEA2020022630311Ecu · malfunctionedON INITIAL ENGINE START (R-CVG) (L-DEN), APU BLEED AIR PRESSURE IS FLUCTUATING BETWEEN 15 AND 25 PSI, RESULTING IN MAX MOTORING OF 19.5 N2 ONLY.(<P>TRANSFERRED TO DMI 124990, CAT C, DUE 04MAR20 IAW MEL 49-11-01-01.</P><P>LP 1196990: PERFORMED APU BITE IAW FIM SDR UIEA202002210296Battery · dischargedAPU FAILED TO START.(<P>FOUND APU BATTERY LOW VOLT AT START 9VDC. REMOVE AND REPLACE APU BATTERY IAW AMM 24-31-04. OPS CHECK NORMAL AT THIS TIME.</P>)SDR HALA2020022100041Apu · shutdownETOPS SIGNIFICANT SYSTEM - X2 APU SHUTDOWN DURING START. // RESTART APU BY EXTERNAL POWER PER AMM 49-00-00-860-008-A. OPS CHECK OKAY OK FOR SERVICE. NO ISSUE NOTEDSDR ASAA2020022072220Starter Gen · inoperativeAFTER START APU WOULD NOT COME ON BUSSES. BLUE "APU GEN OFF BUS " IS ILLUMINATED BUT 0 VOLTS AND FREQ. GROUNDED - YES. WORKED IN CONJUNCTION W/ LOGPAGE 12163865 REMOVED AND REPLACED STARTER GENERATOR REF B737-900 AMM 49-41-21-400-801.SDR UIEA2020021700266Surge Valve · malfunctionedAPU AUTO SHUT DOWN WHEN PACK TURNED ON.(<P>REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW AMM 49-53-01. OPS CHECK GOOD AT THIS TIME. </P>)SDR ASAA2020021042091Exciter · faultedAPU FAULT LIGHT ON START. MULTIPLE ATTEMPTS. GROUNDED - YES. REMOVED AND REPLACED APU IGNITION UNIT REF B737-900 AMM 49-41-31/401. OPS CHECK GOOD.SDR ASAA2020020543086Fault Light · false activationAPU FAULT LIGHT ILLUMINATED DURING START. GROUNDED - YES. PERFORMED APU BITE ON CDU, FOUND FAULT 49-41011 "NO FLAME SHUTDOWN". STARTED & OPERATED APU TWICE REF B737-900 AMM 49-11-00/201 WITH NO DEFECTS NOTED. APU OPERATES NORMALLY.SDR ASAA2020020542085Fault Light · false activationON APU START WE RECEIVED A FAULT LIGHT WITH UNSUCCESSFUL START AFTER APPROXIMATELY 1 MINUTE, FAULT LIGHT WENT OUT. GROUNDED - YES. APU BITE SHOWS 49-41012 MESSAGE, NO APU ROTATION. APU STARTED & OPS NORMAL ON SECOND ATTEMP.SDR P5CA202001310023Control Valve · malfunctionedAPU SHUT DOWN DURING ENG START, UNABLE TO RESTART.(<P>TRANSFERRED TO MDDR 124080, APPLIED DDG 49-11-01B, CAT 'B'.</P><P><SPAN>LP 952758: REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW AMM 49-53-01. PERFORMED APU STARTING AND OPS CHECK OK, NO LEAKS. THIS CLEASDR ASAA2020020483075Eec · faultedAPU SHOWS 0 DUCT PRESSURE. GROUNDED - YES. REMOVED AND REPLACED APU ECU, VERIFIED DUCT PRESSURE IS AVAILABLE, OPS CHECK SUCCESSFUL, NO FURTHER DEFECTS NOTED, REF B737-800 AMM 49-61-12.SDR DALA2020012940680Starter · not reportedAT GATE W/APU AND PACKS ON STRONG ODOR INSIDE CABIN, TAIL CONE AND OUTSIDE NEAR APU COMPARTMENT. SMELL BEST DESCRIBED AS ACRID CHEMICAL BURNING. R/R APU STARTER PER MD90 AMM 49-44. WILL REQ LEAK CHECK. ALSO REQ RELAY R2-63, R2-792 (AMT 794502). R/R LT AND RT SSDR ASAA2020012733972Fault Code · false activationAPU FAULT. GROUNDED - YES. APU FAULT CODE MESSAGE 49-41012. NO APU ROTATION SHUTDOWN. PER B737-800 FIM 49-40 TASK 803, APU FAULT CLEARED, NO OTHER FAULTS NOTED, APU STARTS NORMAL. INTERMITTENT FAULT.SDR UIEA2020011700087Unknown · malfunctionedAPU FAILED ON GROUND TUG AND TAXI 3 TIMES IN 45 MINUTES. 3 STARTS SUCCESSFUL IN 1 HOUR. PERFORMED APU ECU BITE IAW FIM 49-11 FT 958. NO FAULTS NOTED. CLEARED MEMORY ON ECU. OPS CHECK NORMAL AT THIS TIME.SDR ASAA2020012161919Converter · faultedAPU FAULT LIGHT ILLUMINATED DURING APU START. RAN QRH FAULT LIGHT EXTINGUISHED. APU STARTED NORMALLY ON 2ND START. GROUNDED - YES. BITE CHECK SHOWS NO FAULTS IN CURRENT STATUS PAGE, FOUND FAULT CODE 49-41012 'NO APU ROTATION SHUTDOWN' FAULT IN FAULT HISTORY PSDR ASAA2020011631870Unknown · malfunctionedAFTER LANDING, ATTEMPTED TO START APU, FAILT LIGHT ILLUMINATED AND APU WOULD NOT START. QRH FOLLOWED, AFTER 5 MIN, RESTART ATTEMPTED WITH NORMAL INDICATIONS. GROUNDED - YES. PERFORMED APU BITE PROCEDURE PER FIM 49-60 TASK 801, NO CURRENT FAULTS NOTED. FAULT HISDR UIEA2020011300049Unknown · malfunctionedAPU FAILED TO START ON 2 ATTEMPTS AFTER LANDING.(<P>PERFORMED ECU BITE CHECK I.A.W AMM 49-61-05. NO LIGHT OFF FAULT, PERFORMED APU OPERATIONAL TEST I.A.W AMM 49-11-00. NO DEFECTS NOTED.</P>)SDR ASAA2020011331816Starter Gen · failedAPU FAULT LIGHT WHILE STARTING APU AFTER LANDING. GROUNDED - YES. REMOVED AND REPLACED STARTER/GENENERATOR IAW AMM 49-41-21. OPS CKS GOOD.SDR P5CA2020010980006Tru · failedAPU FAULTED AFTER THREE ATTEMPTS. IAW FIM 49-11 FT 987, 988, PERFORMED APU BITE TEST. FOUND BATTERY START APU OK, BUT APU TRU INOPERATIVE. APU START TRU REPLACED AND TESTED SERVICEABLE IAW AMM 24-32-04.SDR AALA202001069020Terminal · arcedAIRCRAFT WAS GROUNDED FOR MEL 49-01B : FOUND BURNED TERMINALS ON POSITIVE SIDE STARTER MOTOR. REPAIRED POSITIVE SIDE TERMINALS IAW ESPM 20-48-11.SDR P5CA2019122630231Apu · faultedAPU FAULT WHEN WE ATTEMPTED TO START IT DURING TAXI.ACCOMPLISHED 2 SUCCESSFUL APU STARTS PER AMM 49-41-00. ACCOMPLISHED APU ECU BITE PER AMM 49-61-05. NO STORED FAULTS. OK FOR SERVICE.SDR UIEA2019121876095Ignition Lead · failedAPU INOP. REMOVED AND REPLACED EXCITER IGNITION IAW AMM 49-41-03. OPS CHECKED GOOD. REMOVED AND REPLACED THE IGNITION LEAD ON APU IAW AMM 49-41-04. OPS CHECKED GOOD.SDR UIEA2019121766088Rectifier · failedAPU FAILED TO START AFTER 2 ATTEMPTS. PERFORMED FIM TASK 49-61-00 AND FOUND APU ECU AT FAULT. REMOVED AND REPLACED ECU IAW AMM 49-61-00. OPS CHECKED NORMAL. PERFORMED FIM TASK 49-61-00. FOUND APU STARTER T/R AT FAULT, REMOVED AND REPLACED IAW AMM 49-61-02. SDR P5CA2019121640228Ecu · malfunctionedAPU AUTO SHUTDOWN(<P>TRANSFERRED TO MDDR 122058 IAW MEL 49-11-01A, CAT 'C', DUE 24DEC19. PLACARD INSTALLED. MCC NOTIFIED.</P><P>LP 1097764 - M2: REMOVED AND REPLACED APU ECU IAW AMM 49-61-05. THIS CLOSES DMI 122058. MCC NOTIFIED AND PLACARD REMOVED.</P>)SDR UIEA2019121206054Apu · faultedAPU FAULT 2 ATTEMPTS (<P>PERFORMED BITE TEST ON ECU, NO FAULTS FOUND. APU STARTED ON 3RD ATTEMPT, OPS CHECK GOOD, REF AMM 49-11-00.</P>)SDR ASAA2019121191567Exciter · inoperativePER FLIGHT CREW REPORT APU WOULD NOT START FAULT LIGHT ILLUMINATED. GROUNDED - YES. PERFORMED APU BITE PROCEDURE REF B737-900 FIM 49-60 TASK 801 FOUND MX MESSAGE 49-41184 IN CURRENT STATUS. COMPLIED W/ FIM 49-40 TASK 804 THRU STEP F(4) NO ISSUES FOUND W/ WIRINSDR UIEA2019120205970Divider · malfunctionedAPU AUTO SHUTDOWN AT DEPARTURE TIME.(<P>TRANSFERRED TO DMI 121390 PER MEL 49-11-01, CAT 'C', DUE 12-DEC-19. PLACARDS INSTALLED AND MCC NOTIFIED.</P><P>LP 1107196 - M5: ACCOMPLISHED HEALTH CHECK, REMOVED AND REPLACED APU FUEL FLOW DIVIDER IAW AMM 49-31-03. OPS SDR ASAA2019112643448Apu · malfunctionedAPU WILL NOT START FAULT LIGHT X 2. GROUNDED - YES. C/W B737-900 FIM 49-40 TASK 802 NO FLAME SHUTDOWN. NO FLAME SHUTDOWN FAULT NOTED.SDR UIEA2019112535951Sensor · faultedAPU AUTO SHUTDOWN. SERVICED APU OIL (1.5 QT) IAW AMM 12-13-04. OPS CHECK AND LEAK CHECK NORMAL, NO FAULTS NOTED. APU AUTO SHUTDOWN AGAIN. REMOVED AND REPLACED INLET TEMP SENSOR ON APU PER AMM 49-61-03. RAN APU, PERFORMED OPERATIONAL CHECK, OPS CHECK GOOSDR UIEA2019112215942Apu · malfunctioned2 FAILED START ATTEMPTS ON THE GROUND; APU.(<P>PERFORMED BITE CHECK OF APU ECM IAW AMM 49-61-05 AND SELF TEST, NO FAULT FOUND. APU STARTED THIRD ATTEMPT, OPS CHECK GOOD AND NO FAULTS NOTED.</P>)SDR HALA2019111800490Starter · unknownETOPS SIGNIFICANT SYSTEM - APU FAULT ON START-UP UNABLE RESTART. // REMOVED AND REPLACED ECB PER AMM 49-61-34. CONDITION SAME. REPLACED APU FUSE 6KA1 PER AMM 49-42-00 AS PRECAUTIONARY. PERFORM ELECTRICAL INSPECTION OF APU STARTER TERMINALS AND RELAYS PER ESPM SDR AALA2019111549014Seal · leakingAIRCRAFT WAS GROUNDED: PILOT REPORTS ON DESCENT FLIGHT ATTENDANTS AND PASSENGERS HAD SMELL OF BURNING, PLASTIC. COMPLAINED OF SORE EYES AND HEADACHE. MAINTENANCE REMOVED AND REPLACED APU STARTER MOTOR SEAL IAW AMM 49-42-51. OPS AND LEAK CHECK GOOD.SDR UIEA2019111435897Apu · malfunctionedAFTER LANDING; APU START EICAS MSG, APU FAULT.(<P>PERFORMED VISUAL CHECK OF THE APU OIL NOT VISIBLE IN SIGHT GLASS. SERVICED APU IAW AMM 12-13-04 AND PERFORMED APU OPERATIONAL CHECK; OPS CHECK GOOD AT THIS TIME. VERIFIED OIL CAP IS INSTALLED. NO LEAKS NOTED.</SDR UIEA2019111425895Apu · malfunctionedAPU WOULD NOT START DURING TAXI IN, WORKED FINE AT DEPARTURE STATION.(<P>PERFORMED APU BITE IAW AMM 49-61-05, NO FAULTS NOTED AT THIS TIME. OPS CHECKED APU IAW AMM 49-11-00, OPS CHECK GOOD AT THIS TIME.</P>)SDR UIEA2019111435900Apu · malfunctionedAPU RELIABILITY COLD SOAK START ACCOMPLISHED ON FLT RFD TO SCK. SAT -66*C, FL 400, START UNSUCCESSFUL, 3 ATTEMPTS.(<P>PERFORMED ECU BITE IAW FIM 49-11 FT 958 LEG 4. REASON SHUTDOWN OCCURRED, REFERENCES DOOR SYSTEM. NO FLAGS. CLEARED ECU. OPS CHECK NORMAL IAW ASDR UIEA2019111205888Apu · faultedAPU FAULT ON TAXI IN, TRIED TO START 3 TIMES.(<P>PERFORMED SELF AND BITE CHECK OF THE ECU IAW AMM B767 49-61-05, NO FAULTS FOUND. ABORTED START MESSAGE, APU STARTED ON FOURTH ATTEMPT. OPS CHECK GOOD AT THIS TIME (1ST ATTEMPT BY MX). BATTERY RECOVERED FROM EARLSDR ASAA201911131318Converter · failedAPU FAILED 2 START ATTEMPTS. FAULT LIGHT ILLUMINATED WITH EGT @ 900C AND APU MAKING RATTLING NOISE. GROUNDED - YES. REMOVED AND REPLACED STARTER CONVERTER UNIT. REF B737-800 AMM 49-41-61. OPS CHECK GOOD.SDR ASAA2019110431252Unknown · malfunctionedAPU, NO ELECTRICAL AVAILABLE. GROUNDED - YES. BLUE PWR AVAIL LIGHT IS ON BUT NO VOLTS / FREQS SHOWING AND WILL NOT GO ONLINE. SHUT DOWN APU AND CYCLED GCU C/B'S (GCU TESTED NML). APU STARTED AND CAME ONLINE, CKS NML REF B737-900 AMM 24-21-00. GND VERIFICATION SDR UIEA2019110205836Unknown · malfunctionedAPU AUTO SHUTDOWN PRIOR TO BLOCK OUT.(<P>PERFORMED BITE TEST ICU IAW AMM 49-11 FAULT 3 958, OPS TEST OK.<BR /></P>)SDR ASAA2019110131223Ignition Unit · faultyDURING APU START CREW ON RAMP REPORTED LARGE VOLUME OF SMOKE, APU START ABORTED AND FAULT LIGHT OBSERVED ON. GROUNDED - YES. REPLACED APU IGNITION UNIT REF B737-800 AMM 49-41-31. ALSO REPLACED IGNITOR PLUG REF AMM 49-41-51. OPS CK GOOD. INDICATIONS NORMAL.SDR UIEA2019110105833Unknown · malfunctionedAFTER LANDING, APU DID NOT START, TWO ATTEMPTS.(<P>PERFORMED OPERATIONAL CHECK IAW AMM 49-60-00, APU STARTED, NO FAULTS NOTED.</P>)SDR UIEA2019102965792Control Unit · failedAPU SHUTDOWN IN THE BLOCKS. TURNED APU SWITCH OFF (1 MINUTE), RE-ATTEMPTED START, FAULT LIGHT STAYED ILLUMINATED. NO START.(<P>OK TO DEFER APU IAW MEL 49-11-01A DUE TO AUTO SHUTDOWN. TRANSFERRED TO MDDR #119677 PER MEL 49-11-01A, CAT 'C', DUE DATE: 04-NOV-19.<SDR P5CA2019102420211Tru · malfunctionedAPU WON'T START. (<P>TRANSFERRED TO MDDR #119510 IAW DDG 49-11-01A, CAT 'C', DUE DATE: 01-NOV-19. PLACARD INSTALLED. DISPATCH NOTIFIED YM @ 1443Z.</P><P>LP 1101236 - M2: T/S PER FIM 49-11. NEEDS APU TRU, P/N 60B40104-2. DMI #119510 REMAINS OPEN. </P><P>REF LOGSDR UIEA2019102325782Apu · unknownAPU FAILED TO START ON TAXI IN. (<P>PERFORMED TWO SUCCESSFUL APU STARTS IN A ROW WITH NO DEFECTS NOTED PER AMM 49-00-00, OPS NORMAL. </P>)SDR UIEA2019102205776Apu · malfunctionedAPU COLD SOAK START UNSUCCESSFUL, 3 ATTEMPTS @ FL 390, SAT -38 DEG.(<P>COMPLIED WITH OPS CHECK OF THE APU. START SUCCESSFUL 2 TIMES ON GROUND IAW AMM 49-11-00, OPS GOOD. REQUESTED COLD SOAK ON NEXT FLT. NOTE: MDDR 119439, 25-AP-01, PREVIOUSLY OPENED IS STILL SDR UIEA2019102215761Apu · malfunctionedAPU FAULT ON TWO START ATTEMPTS.(<P>PERFORMED BITE CHECK OF APU ECU IAW B767 AMM 49-61-05, OPS CHECK NORMAL. APU STARTED ON 3 ATTEMPT. OPS CHECK NORMAL, NO FAULTS FOUND.</P><P>NOTE: LP 1213015 - M4: AIRCRAFT RELEASED TO ETOPS SERVICE FOR APU COLD SOAK START VESDR UIEA2019101765737Apu · malfunctionedAPU FAULT, ATTEMPTED 3 STARTS WITH NO SUCCESS. APU DOOR STATUS MESSAGE APPEARED MOMENTARILY. PERFORMED APU OPERATIONAL TEST, OPS CHECK GOOD PER AMM 49-11-00. ALSO PERFORMED APU CONTROL UNIT BITE TEST, NO FAULTS NOTED AT THIS TIME.
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