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.

SDR NACA2019080610094Exciter · inoperativeAPU SHUTDOWN AFTER IT WAS RUNNING FOR OVER 5 MINUTES ON THE GROUND. DEFERRED AS PER MEL 49-11-01 ON 8-1-19 AT 2235Z CAT "C". REMOVED AND REPLACED APU EXCITER BOX IAW AMM 49-41-03. OPS. NORMAL.Aug 1, 2019 · N351CM · Boeing 767323SDR HALA2019080200379Apu · malfunctionedAPU AUTOMATICALLY SHUTDOWN AT GATE. TROUBLESHOT AND FOUND A FAULT ON APU, FAULT CODE 494157, STARTER MOTOR AND ALSO APU STARER CLUTCH. REMOVED AND REPLACED IAW AMM 49-44-01-400-801, AND 49-44-03. CONDITION SAME. R & R THE APU ASSY IAW E1128-717-49-006. LEAKJul 31, 2019 · N481HA · Boeing 717200SDR UIEA2019073004897Unknown · malfunctionedAFTER LANDING, "APU FAULT" EICAS MSG. APU FAILED TO START WITH X3 ATTEMPTS. (<P>STARTED APU IAW AMM 49-05-00, STARTED FIRST ATTEMPT. OPS CHECK TESTED OK. BLEED AIR PRESSURE NORMAL. PERFORMED ECU BITE PER FIM 49-11 FAULT TREE 987. NO FAULTS, OK FOR SERVICE.</P>Jul 30, 2019 · N1499A · Boeing 767328SDR P5CA2019073000159Ignition Lead · brokenAPU IGNITION LEAD BROKEN. (<P>REMOVED AND REPLACED APU IGNITION LEAD IAW AMM 49-41-04.</P>)Jul 28, 2019 · N647GT · Boeing 767306SDR UIEA2019072904894Unknown · malfunctionedAPU RELIABILITY COLD START ACCOMPLISHED ON FLIGHT LEG ONT-RFD SAT -47 FL 410, START UNSUCCESSFUL ON 3 ATTEMPTS.(<P>C/W OPS CHECK OF APU. NO DEFECTS NOTED, APU STARTS SUCCESSFULLY. APU COLD START MDDR 115327 REMAINS OPEN IAW AMM 49-11-00.</P><P>LP 1090199 - DJul 26, 2019 · N1487A · Boeing 76731KSDR NACA2019072500090Unknown · malfunctionedAPU WOULD NOT BATTERY START, SHOWS FAULT LIGHT. PERFORMED APU BITE TEST PER AMM 49-11-00, APU STARTED OK.Jul 25, 2019 · N379CX · Boeing 767323SDR UIEA2019072504848Unknown · malfunctionedAPU RELIABILITY COLD START FAILED ON FLT LEG BWI-PDX SAT -42 FL 400. UNSUCCESSFUL 3RD ATTEMPT. (<P>PERFORMED BITE CHECK OF APU PER AMM 49-00-00. NO FAULTS NOTED. APU START SUCCESSFUL 1ST ATTEMPT ON GROUND.<BR /></P>)Jul 25, 2019 · N1487A · Boeing 76731KSDR UIEA2019072504846Unknown · malfunctionedAPU FAULT AFTER LANDING, 2 STARTS ATTEMPTS UNSUCCESSFUL. (<P>OPS CHECKED PER B767 AMM 49-21-00, NO FAULTS NOTED. STARTED FIRST ATTEMPT. </P>)Jul 25, 2019 · N1499A · Boeing 767328SDR DALA2019072304380Terminal · damagedSHIP 3876 ON PUSHBACK- CLEARED TO START- WHEN STARTING ENGINE THE APU ELEC KICKED OFF (APU CONTINUED RUNNING). A LOUD POP AND VERY STRONG ODOR OF ELECTRICAL FUMES IN THE COCKPIT, FORWARD GALLEY AND ALSO NOTED BY THE TUG CREW PUSHING THE JET. RETURNED TO GATE .Jul 23, 2019 · N876DN · Boeing 737932ERSDR ASAA2019072230142Ignition Lead · wornAPU IGNITOR PLUG LEAD WORN. GROUNDED - YES. REMOVED AND REPLACED APU IGNITOR PLUG LEAD IAW AMM TASK 49-41-52/401. APU START AND RUN OPS CHECK GOOD.Jul 22, 2019 · N560AS · Boeing 737890SDR UIEA2019070804711Relay · faultyAPU WILL NOT START ON GROUND(<P><SPAN>REMOVED / AND REPLACED RELAY K176 AND K547 IAW WDM 49-15-11 AND B767 FIM TASK 49-11 / FT 988. OPS CHECK GOOD</SPAN><BR /></P>)Jul 7, 2019 · N1499A · Boeing 767328SDR HALA2019070500345Exciter · faultyETOPS SIGNIFICANT SYSTEM - APU FAULT ON START. R/R APU EXCITER AND BOTH IGN PLUGS PER AMM 49-41 OPS CHECK GOOD.Jul 3, 2019 · N373HA · Airbus A330243SDR ASAA2019063029874Power Unit · failedAPU FAULT LIGHT ILLUMINATED ON START ATTEMPT AND FAILED TO START, PERFORMED APU BITE REF FIM 49-60 TASK 801 SHOWS FAULT MAINT MSG 49-41012. PERFORMED FIM 49-40 TASK 803 NO CURRENT FAULTS SHOWN ATTEMPTED APU START FAULT LIGHT ILLUMINATED AND NO APU START. APU BJun 30, 2019 · N492AS · Boeing 737990ERSDR UIEA2019063004621Unknown · malfunctionedAPU FAULT.(<P>PERFORM BITE CHECK OF ECU, ABORTED START FAULT, NO FURTHER INFORMATION PER AMM 49-61-05. START SUCCESSFUL 1ST ATTEMPT, OPS CHECK GOOD.</P><P><BR /></P><P>NOTE: LP 1066170 - M3: OPENED AN APU COLD SOAK START DEFERRAL (OPTION C) - MDDR NR 113975 (DJun 29, 2019 · N1499A · Boeing 767328SDR UIEA2019070104637Plug · defectiveAPU FAILED TO START AFTER 3 ATTEMPTS, AFTER LANDING(<P>TRANSFERRED TO MDDR 113916 PER MEL 49-11-01, CAT C, DUE 08 JUL 19.</P><P>LP 818865 - M11: REMOVED AND REPLACED EXCITER BOX ON APU REF AMM 49-41-03. DMI REMAINS OPEN AT THIS TIME. OFF PART(P/N: 10-617075-6,Jun 28, 2019 · N649GT · Boeing 767375SDR ASAA2019062329831Starter Gen · failedAPU WILL NOT START. FAULT & MAINT LIGHT. GROUNDED - YES. TROUBLE SHOOTING ON W/O: 458518 TASKCARD: N/R-00002 FOUND MAINT MSG 49-41244 GEN DIODE FAIL SHUTDOWN. ACCOMPLISHED B737-900 FIM 49-40 TASK 806. APU REQUIRES STARTER GENERATOR REPLACEMENT. REMOVED AND REJun 23, 2019 · N419AS · Boeing 737990ERSDR UIEA2019062524558Apu · faultedAPU FAULT, DID NOT START AFTER 2 ATTEMPTS. PERFORM BITE CHECK OF ECU PER AMM 49-61-05, NO FAULTS FOUND. APU START SUCCESSFUL OF 1ST ATTEMPT BY MAINT, OPS CHECKED GOOD.Jun 22, 2019 · N1997A · Boeing 76733ASDR ASAA2019062499779Converter · failedAFTER STARTING THE APU THE BLUE MAINT LIGHT CAME ON. AFTER WE SHUT DOWN THE APU THE FAULT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED APU STARTER GENERATOR. REF B737-800 AMM TASK 49-41-21-000-881 AND AMM 49-41-21-400-801. NO HELP. REMOVED AND REPLAJun 19, 2019 · N594AS · Boeing 737890SDR ASAA2019061749710Lead · failedON LANDING STARTED APU GOT FAULT LIGHT REATTEMPTED PER CHECKLIST AND GOT FAULT LIGHT SECOND TIME. GROUNDED - YES. REMOVED AND REPLACED APU IGNITER PLUG REF B737-900 AMM 49-41-51. REMOVED AND REPLACED IGNITION LEAD REF AMM 49-41-52. REMOVED AND REPLACED IGNITIOJun 14, 2019 · N467AS · Boeing 737990ERSDR UIEA2019061404490Valve · malfunctionedRETURNED TO BLOCKS AFTER APU SHUTDOWN. REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW AMM 49-53-01 OPS CHECK PER AMM 49-11-01 GOOD.Jun 14, 2019 · N640GT · Boeing 7673S1SDR UIEA2019061424471Lead · failedDURING DAILY CHECK, FOUND APU INOPERATIVE, NO LIGHT OFF. PERFORMED FIM 49-11 FT 964. REMOVED AND REPLACED IGNITION LEAD IAW AMM 49-41-04.Jun 11, 2019 · N1619A · Boeing 7673Y0SDR HALA2019061000283Warning Message · false activationETOPS SIGNIFICANT SYSTEM - ELECTRIC APU BAT SYSTEM FAULT ECAM. // T/S PER REF 24-30-00-810-833A. PERFORMED BCL APU TEST. NO FAULTS FOUND DURING TEST. A/C OK FOR SVC.Jun 8, 2019 · N393HA · Airbus A330243SDR UIEA2019060704412Ecu · malfunctionedAPU AUTO SHUTDOWN. REMOVED AND REPLACED APU SURGE BLEED VALVE IAW AMM 49-53-01, NO HELP, APU SURGES INTERMITTENTLY. PERFORMED FIM 49-11 FT 958, FOUND ECU FAULTING DELTA SENSOR FLOW SENSING MODULE AND IGV ACTUATOR. REMOVED AND REPLACED APU ECU. OPERATIONALJun 7, 2019 · N640GT · Boeing 7673S1SDR ASAA2019060629605Igniter · damagedWHILE ACCOMPLISHING APU IGNITOR PLUG REPLACEMENT REF TASK CARD 78349007, FOUND IGNITOR LEAD GASKET DAMAGED. GROUNDED - YES. REMOVED AND REPLACED IGNITER PLUG LEAD IAW B737-800 AMM 49-41-52-000/400. OPS CHECK NORMAL. GROUND VERIFICATION SUCCESSFUL.Jun 6, 2019 · N538AS · Boeing 737890SDR UIEA201906054387Gcu · malfunctionedAPU INOP. PERFORMED BITE PROCEDURE OF APU ECU IAW AMM 49-61-05, NO FAULTS FOUND AND APU OPERATES NORMALLY. MCC REQUESTS REPLACEMENT OF GCU. REMOVED AND REPLACED APU GCU IAW AMM 24-22-02. PERFORMED OPS CHECK OF APU GCU AND BITE CHECK. NO FAULTS FOUND, OPS CHEJun 4, 2019 · N1229A · Boeing 767306SDR UIEA2019060634373Charger · malfunctionedAPU INOP. APU AUTO SHUTSDOWN AFTER REACHING 36% RPM.(<P>PERFORMED ECU BITE PROCEDURE PER B767 FIM 49-11 FAULT TREE 987. NO MINI FLAGS. PERFORMED BITE PROCEDURE OF APU ECU IAW B767 FIM 49-11 PT 987, NO FAULTS FOUND. WHEN STARTING APU BATT VOLTAGE STAYS ABNORMAJun 3, 2019 · N1499A · Boeing 767328SDR UIEA201906054372Ecu · malfunctionedAPU FAULT AND SHUTDOWN ON GROUND. REMOVED AND REPLACED APU ECU IAW AMM 49-61-03. OPS CK NORMAL.Jun 1, 2019 · N1709A · Boeing 767375SDR UIEA20190604360Apu · malfunctionedAPU TOOK 3 ATTEMPTS TO START. PERFORMED AUX POWER CONTROL UNIT BITE TEST. TEST PASS, NO FAULTS SHOWN. OPS NORMAL AS PER AMM 49-11-00.Jun 1, 2019 · N1181A · Boeing 7673Y0SDR ASAA2019060329557Converter · failedON TAXI IN APU FAULT LIGHT ILLUMINATED AFTER START ATTEMPT. GROUNDED - YES. REMOVED AND REPLACED STARTER CONVERTER UNIT SERIES 7 IAW B737-900 AMM 49-41-61/401. GROUND VERIFICATION TEST IS GOOD. APU STARTS AND HOLDS LOAD WITH EXTERNAL AND BATTERY. PERFORMED OPEMay 30, 2019 · N472AS · Boeing 737990ERSDR ASAA2019060399540Converter · inoperativeFAULT LIGHT ILLUMINATED ON APU START. GROUNDED - YES. ACCOMPLISHED START CONVERTER UNIT SHOWS START SYSTEM INOP-FAULT ISOLATION. VERIFIED MAINT HISTORY MESSAGE 49-41250 REF B737-800 FIM 49-40 TASK 811. REMOVED AND REPLACED APU START CONVERTER UNIT REF B737-800May 29, 2019 · N585AS · Boeing 737890SDR UIEA2019052804328Relay · faultyAPU FAILED TO START. (<P>T/S PER FIM 49-11 FT 991, FOUND FAULTY START RELAY. REMOVED AND REPLACED RELAY K197 WITH NEW. 3 SUCCESSFUL STARTS ACCOMPLISHED REF AMM 49-41-11. NO DEFECTS NOTED AT THIS TIME.</P>)May 28, 2019 · N1499A · Boeing 767328SDR ASAA2019052729516Exciter · failedAPU AUTO-SHUT DOWN GROUNDED - YES. R/R APU IGNITION EXCITER REF AMM 49-41-38 OPS CK GOOD.May 27, 2019 · N283VA · Airbus A320214SDR UIEA2019052504294Unknown · malfunctionedAPU FAILED TO START ON TAXI IN. 2 ATTEMPTS. (<P>PERFORMED APU CONTROL UNIT BITE TEST. NO FAULTS FOUND AT THIS TIME. APU OPS TEST GOOD IAW AMM 49-61-05-742.</P>)May 24, 2019 · N1499A · Boeing 767328SDR UIEA2019051804227Relay · failedAPU COULD NOT START "START ABORTED" ON BITE (<P>TRANSFERRED TO MDDR 111830 IAW DDG 49-11-01A CAT "C".</P><P>LP 1074463 - M7: R&R APU BATTERY IAW AMM 24-31-04. NO HELP. MDDR REMAINS. BATTERY OFF PART (P/N: 4579, S/N: 113363)</P><P>LP 1074463 - M8: R&R APU BATTEMay 18, 2019 · N1997A · Boeing 76733ASDR ASAA2019051829377Power Unit · failedAPU GENERATOR FAILS TO COME ONLINE. GROUNDED - YES. FOUND START POWER UNIT FAULTY. REMOVED AND REPLACED START POWER UNIT IAW AMM 49-41-71. OPS CHECKS GOOD. VERIFIED APU GENERATOR COMES ONLINE AFTER APU START ON BATTERY.May 18, 2019 · N581AS · Boeing 737890SDR P5CA2019051800080Unknown · malfunctioned"APU FAULT" ON TAXI IN.(<P>ECU FAULT "NO LIGHT". TRANSFERRED TO DMI 111843 IAW MEL 49-11-01A. YM @ 15:01.(M) PROCEDURE C/W. EXPIRES 28MAY19.</P><P>LP 0994059 - M2: PERFORMED T/S IAW FIM 49-11 FT 988. PERFORMED APU BITE, NO MSG OR FAULTS FOUND. STARTED APU, OPSMay 18, 2019 · N647GT · Boeing 767306SDR ASAA2019051229318Unknown · malfunctionedAPU WILL NOT START / NO ROTATION. GROUNDED - YES. T/S APU WOULD NOT START 4 TIMES AND THREW MAINT MESSAGE 49-41012 NO APU ROTATION SHUTDOWN EACH TIME SHUTDOWN & RESET POWER TO A/C. PERFORMED FIM 49-40 TASK 803, APU STARTS AND OPERATES NRML ON ALL SUBSEQUENT ATMay 12, 2019 · N536AS · Boeing 737890SDR UIEA2019051004159Unknown · malfunctionedAPU FAILED TO START AFTER LANDING THREE STARTS WERE ATTEMPTED.(<P>TRANSFER TO DMI# 111430 MEL 49-11-01A CAT C DUE 20MAY19 PLACARDS INSTALLED. </P><P><SPAN>LP 1073230: PERFORMED ECU BITE, NO FAULTS NOTED. PHYSICALLY CHECKED APU OIL QUANTITY. PERFORMED THREE SUCMay 10, 2019 · N1619A · Boeing 7673Y0SDR UIEA2019051004161Unknown · malfunctionedAPU WILL NOT START ON THE GROUND 3X.(<P>OPS CHECKED OK BY MX IAW AMM 49-00-00.</P>)May 8, 2019 · N645GT · Boeing 767324SDR UIEA2019050104089Unknown · malfunctionedAPU WON'T START. (<P>PERFORMED APU ECU BITE TEST IAW 49-11.00. OPS CHECKED GOOD AT THIS TIME.</P>)Apr 30, 2019 · N1013A · Boeing 76736NSDR UIEA2019043094070Relay · failedAPU WON'T START. PERFORMED APU AIR INTAKE SYSTEM TEST IAW AMM 49-15-00. AIR INTAKE CB POPS OUT. NOTICED WHEN THE INTAKE OPENS WITHOUT POPPING BREAKERS THE LT FWD FUEL PUMP LIGHT ILLUMINATED AND EXTINGUISHED CORRECTLY WITH EICAS MSGS. PER WDM 49-15-11 PAGE 1Apr 26, 2019 · N1321A · Boeing 767306SDR UIEA2019042974053Module · failedAPU SHUTDOWN WHILE ON THE GROUND (UNCOMMANDED).(<P>PERFORMED APU BITE IAW FIM 49-11 FT 987. FOUND PT SENSOR FAULTY. PERFORMED PT SENSOR FIM 49-11 F/T A15 BLOCK 1. R/R FLOW SENSING MODULE IAW AMM 49-53-08. OPS CHECK GOOD AND NO FURTHER DEFECTS NOTED.</P><P>LP 1Apr 26, 2019 · N1439A · Boeing 76733ASDR UIEA2019042653957Exciter · malfunctionedAPU FAULT MESSAGE AFTER LANDING(<P>REMOVED AND REPLACED APU EXCITER IAW AMM 49-41-03. OPS CHECK GOOD. NO OTHER DEFECTS NOTED AT THIS TIME. </P>)Apr 25, 2019 · N1619A · Boeing 7673Y0SDR UIEA2019042603961Ecu · trippedAFTER POWER TRANSFER FROM GPU TO AIRCRAFT POWER, APU SHUT DOWN.(<P>RESET ECU FOR APU AMM 49-11-00. OPS CHECK GOOD.</P>)Apr 23, 2019 · N1327A · Boeing 76737DSDR UIEA2019042543948Starter · inoperativeAPU STARTER IS INOP. (<P>REMOVED AND REPLACED APU STARTER ASSY IAW B767 AMM 49-41-01. PERFORMED SATISFACTORY OPS CHECK IAW B767 AMM 49-41-01. NO DEFECTS NOTED.</P>)Apr 22, 2019 · N650GT · Boeing 767231SDR ASAA2019041989052Exciter · failedWHILE TOWING A/C APU FAULT LIGHT CAME ON AND APU UNABLE TO START. GROUNDED - YES. PERFORMED APU BITE FOUND FAULT 49-31175 WAS 75 STARTS OLD AND NOT LIKELY RELATED TO CURRENT PROBLEM. INSPECTED APU WIRE HARNESS AND RANG PINS ON FCU PER B737-800 FIM 49-32 TASK 8Apr 18, 2019 · N581AS · Boeing 737890SDR ASAA2019041428995Exciter · failedDURING A/C REPOSITION APU FAILED TO START. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 49-40 TASK 804 NS VERIFIED APU FAULT ON CDU. REMOVED AND REPLACED APU IGNITION UNIT REF B737-900 AMM 49-41-31-000-801/400-801. ACCOMPLISHED BITE TEST AND NO FAULTS FOUND. APU Apr 14, 2019 · N408AS · Boeing 737990ERSDR UIEA2019041503874Ecu · dirtyAPU WILL NOT START. STARTED APU 4 TIMES AND CLEARED APU ECU IAW AMM 49-00-00. OPS CHECKS GOOD AT THIS TIME, NO FAULTS.<BR /></P>)Apr 14, 2019 · N1499A · Boeing 767328SDR UIEA2019041503871Apu · malfunctionedAPU FAULT ON 1ST ATTEMPT AFTER LANDING. SUCCESSFUL START ON 2ND ATTEMPT. PERFORMED BITE TEST PER AMM 49-81-02. OPS CHECK GOOD PER AMM 49-11-00. NO DEFECTS NOTED AT THIS TIMEApr 11, 2019 · N1409A · Boeing 767306SDR UIEA201904123840Battery · faultedUNABLE TO START APU WHILE TAXI IN. TRIED TWO ATTEMPTS. APU INOP. PERFORMED FIM 49-11FT 987 & 988. FOUND FAULTS WITH THE ECU. PERFORMED FIM 49-11 FAULT TREE 988, FOUND APU BATTERY CHARGER TO BE SUSPECTED AT FAULT. PERFORMED FIM 49-11 FT 988, VERIFIED BATTApr 10, 2019 · N1439A · Boeing 76733A
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