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 UIEA2019101305710Selector · looseAPU START SELECTOR IS LOOSE. ADJUSTED & TIGHTENED APU START SELECTOR IAW AMM 49-61-00. OP'S CHECK NORMAL AT THIS TIME.Oct 13, 2019 · N1409A · Boeing 767306SDR ASAA2019101413107Eec · failedDURING APU START AFTER LANDING FAULT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED APU ECU ASSY IAW B737-800 AMM 49-61-12 OPS CHECK GOOD BITE CHECK GOOD NO FURTHER DEFECTS NOTED.Oct 11, 2019 · N535AS · Boeing 737890SDR UIEA2019101095690Solenoid Valve · failedAPU RELIABILITY COLD SOAK -55C FL 390. 3 ATTEMPTS/UNSUCCESSFUL. PERFORMED APU HEALTH CHECK IAW EO 6749A003, NO DEFECTS NOTED. REMOVED AND REPLACED DE-OIL SOLENOID VALVE IAW AMM 49-27-08. LEAK CHECK GOOD. SUCCESSFUL APU COLD SOAK START C/W INTO CVG. </P>)Oct 9, 2019 · N1499A · Boeing 767328SDR UIEA2019100985679Apu · malfunctionedAPU WOULD NOT START X3 ATTEMPTS. PERFORMED APU ECU BITE TEST, NO FAULTS NOTED. OPS CHECK OK IAW AMM 49-11-00. APU COLD SOAK REQUIRED DUE TO WORK ON APU.Oct 8, 2019 · N1499A · Boeing 767328SDR ASAA2019101170959Fault Light · false activationAPU FAULT LIGHT ON 1ST ATTEMPT TO START. 2ND START WAS NORMAL. GROUNDED - YES. APU FAULT LIGHT ON 1ST ATTEMPT TO START CLEARED APU FAULT CODE 49-41012. OPS CHECK NORMAL. A/C OK FOR SERVICE.Oct 7, 2019 · N462AS · Boeing 737990ERSDR ASAA2019100733941Exciter · intermittentAPU "FAULT" LIGHT WHEN ATTEMPTED TO START APU AFTER LANDING. GROUNDED - YES. FOUND "NO FLAME SHUTDOWN" FAULT. ACCOMPLISHED B737-800 FIM 49-40 TASK 802. ACCOMPLISHED 2 SUCCESSFUL STARTS, NO FAULTS FOUND. REMOVED AND REPLACED APU EXCITER ASSY AND IGNITER PLUG, POct 3, 2019 · N563AS · Boeing 737890SDR UIEA2019100325629Sensor · malfunctionedAPU AUTO SHUTDOWN WITH APU FAULT EICAS MSG. PERFORMED APU BITE CHECK IAW FIM 49-11 FAULT TREE 958. ON LAST THREE STARTS/AUTO SHUTDOWNS, FOUND HIGH OIL TEMP FAULT. STARTED APU TWICE WITH NO FAULTS OR ISSUES, PERFORMED FIM 49-11 FAULT TREE 958. NO CURRENT MINIOct 2, 2019 · N1619A · Boeing 7673Y0SDR HALA2019100293151Exciter · failedAIRCRAFT FAILED APU COLD SOAK START 3 ATTEMPTS AT OAT -56, -50, -30, FL 400, 350, 270. REPLACED IGNITION EXCITER.Sep 30, 2019 · N393HA · Airbus A330243SDR UIEA2019100105612Battery · failedTHREE ATTEMPTS TO START APU, EICAS APU FAULT. PERFORMED BITE CHECK OF APU ECU I.A.W AMM 49-61-00 AND FOUND NO MINIFLAGS , START ABORT OR PREVIOUS LEGS SHOW SEE MAINTENANCE MANUAL , REMOVED AND REPLACED APU BATTERY IAW AMM 24-31-04. OPS NORMAL.,Sep 30, 2019 · N1487A · Boeing 76731KSDR HALA2019093000391Exciter · faultyETOPS SIGNIFICANT SYSTEM - APU INFLIGHT START OAT - -56 -51 -30 FL 400 350 270 # ATTEMPTS - 3 UNSUCCESSFUL. // R/R APU EXCITER PER A330 AMM 49-41 AND SYSTEM A IGNITER AND LEAD R/R PER A330 AMM 49-41. OPT CHK NML.Sep 29, 2019 · N393HA · Airbus A330243SDR UIEA2019093005611Unknown · malfunctionedAPU WILL NOT START ON GROUND, AT THE END OF FLIGHT. (<P>PERFORMED 3 SUCCESSFUL APU STARTS, NO DEFECTS NOTED. ALL PARAMETERS NORMAL ON APU HEALTH CHECK, APU OPS TEST GOOD IAW AMM 49-11-00. APU BITE, NO FAULTS. </P>)Sep 28, 2019 · N1487A · Boeing 76731KSDR DALA2019092905576Apu · odor"NO GO" ODI PREVENTION - DRIVER DO NOT DISPATCH THE AIRCRAFT" - W/O MCC APPROVAL" - ON TAXI OUT APU AUTO S/D THEN PASS NOTED A ODD SMOKE/SMELL IN THE CABIN. CREW ALSO NOTED WEIRD SMELL BUT ATTRIBUTED TO THE APU S/D. C/W AMDS CARD 2120-2367 PER NO GO ODI PREVENSep 28, 2019 · N910DL · Doug MD88SDR ASAA2019092630855Unknown · malfunctionedAPU FAULT LIGHT ILLUMINATED WHEN TRYING TO START APU. APU STARTED ON FOURTH ATTEMPT. GROUNDED - YES. VERIFIED FAULT LIGHT ON WHEN APU SWITCH IS MOVED TO THE ON POSITION, SAME RESULT THE SECOND TIME BUT THE THIRD TIME W/O FAULT LIGHT AND APU ABLE TO START. DUPLSep 26, 2019 · N535AS · Boeing 737890SDR UIEA2019092605580Unknown · malfunctionedAPU FAILED DURING START AND APU FAULT EICAS MESSAGE OCCURRED. (<P>PERFORMED BITE TEST ON APU CONTROLLER, NO FAULTS NOTED. STARTED APU ON FIRST ATTEMPT, NO EICAS MESSAGE PER AMM 49-11-00.</P>)Sep 25, 2019 · N1181A · Boeing 7673Y0SDR UIEA2019092505576Unknown · malfunctionedREF MEL 25-AP-01 APU COLD SOAK START UNSUCCESSFUL - 2 ATTEMPTS, FL 410, SAT -59°C, (APU STARTED - RUN MOMENTARILY THEN "APU FAULT" EICAS & SHUTDOWN). (<P>LP 1223468 - M6: WIND MILLED #1 ENG, PUT APU IN MES MODE AND CHECKED SURGE VALVE POSITION. IT WAS NEAR CLSep 25, 2019 · N1181A · Boeing 7673Y0SDR ASAA2019092330800Exciter · inoperativeFAULT ON APU START. 2 ATTEMPTS. GROUNDED - YES. REMOVED AND REPLACED APU EXCITER PER AMM 49-41-31-400-801 AND 49-41-31-00-801. OPS CHECK GOOD.Sep 23, 2019 · N535AS · Boeing 737890SDR ASAA2019092030775Warning System · false activationAPU FAULT LIGHT CAME ON WITH FIRST START ATTEMPT. APU DIDN'T START. GROUNDED - YES. ACCOMPLISHED APU BITE CHECK REF FIM 49-60-00-810-810 NO CURRENT STATUS FAULTS LOGGED. PREVIOUS FAULT HISTORY LOGGED FAULT 49-11019 FOUND TO BE AN INTERMITTENT FAULT. APU GROUNDSep 20, 2019 · N535AS · Boeing 737890SDR HALA201909200381Starter · malfunctionedETOPS SIGNIFICANT SYSTEM - APU WILL NOT START ON 2 ATTEMPTS. NO N1 ROTATION - ECAM MESSAGE, APU FAULT - AUTO SHUTDOWN. // REPLACED STARTER PER A330 AMM 49-42-51, AND REPLACED FUSE PER A330 AMM 49-42-00. OPS AND LEAK CHECK GOOD. OK FOR SERVICE.Sep 19, 2019 · N378HA · Airbus A330243SDR ASAA2019091930811Igniter · failedAPU AUTO SHUTDOWN ON TAXI IN GROUNDED - YES. R&R APU IGNITION PLUG REF AMM 49-41-41. OPS TEST OF APU AT 33% GENERATOR LOAD GOOD. A/C RELEASED FROM MEL 49-10-01-01, MAINTENANCE PROCEDURE REVERSED, MDDR 71133 REMOVED, SEAMC NOTIFIED.Sep 19, 2019 · N283VA · Airbus A320214SDR ASAA2019091930777Unknown · malfunctionedPILOT SELECTED START ON APU SWITCH, AND RELEASED TO RUN. AFTER APPROXIMATELY 2-3 MINUTES, PILOT OBSERVED APU EGT GUAGE READING BETWEEN 200-300 DEGREES, THE LOW OIL PRESSURE LIGHT ILLUMINATED, AND THE APU GEN OFF BUS LIGHT WAS NOT ILLUMINATED. PILOT SELECTED OFSep 19, 2019 · N402AS · Boeing 737990ERSDR UIEA2019091805527Unknown · malfunctionedAPU FAULT EICAS MESSAGE. APU WOULD NOT START AFTER LANDING, MOMENTARY APU DOOR STATUS MESSAGE APPEARED. 2 START ATTEMPTS. PERFORMED BITE TEST OF THE APU ECU, NO FAULTS FOUND. OPS CHECK OK, APU STARTED ON FIRST ATTEMPT BY MX. OPS CHECK OK AS PER AMM 49-41-00 ANSep 18, 2019 · N1499A · Boeing 767328SDR UIEA2019092005547Unknown · malfunctionedAPU FAILED TO START WITH EGT RISING INTO HIGH 100 & RPM MAX OF 12%. STARTED THIRD ATTEMPT. SHUTDOWN APU. INSPECTED ENGINE OIL, FOUND NORMAL. CHECKED ECU, NO FAULTS AND NO DATA INDICATED. RESTARTED NORMAL IAW AMM 49-11-00.Sep 18, 2019 · N645GT · Boeing 767324SDR UIEA2019091905544Unknown · malfunctioned3 APU FAULT / START DURING SHUT DOWN. TRANSFERRED TO MDDR #117876 PER DDG 25-AP-01, OPTION C, CAT N, DUE 09-16-20. LP 1076132 - M2: PERFORMED APU BITE TEST IAW FIM 49-11 FT 958, NO FAULTS NOTED. (2) TWO SUCCESSFUL STARTS. MDDR 117876 REMAINS OPEN PER DDG 25-APSep 17, 2019 · N1487A · Boeing 76731KSDR UIEA2019091905534Starter · faultyAPU "NO START". ECU FAULTED "APU STARTER". REMOVED AND REPLACED APU STARTER IAW AMM 49-41-01. OPS CHECK GOOD.Sep 17, 2019 · N649GT · Boeing 767375SDR UIEA2019091705521Unknown · malfunctionedAPU NO START AFTER LANDING, ATTEMPTED 2X. PERFORMED APU BITE PROCEDURE, NO FAULTS NOTED. COMPLETED 3 SUCCESSFUL STARTS WITH NO ISSUES. WORK DONE IAW FIM 49-11 FT 958, ALL OPS CHECKS GOOD.Sep 16, 2019 · N1487A · Boeing 76731KSDR UIEA2019091605510Unknown · malfunctionedAPU INOP. TRANSFERRED TO MDDR #117786 AS PER MEL 49-11-01A, CAT "C". LP 1087280 - M6: PERFORMED OPS CHECK OF APU IAW AMM 49-11-00. APU CUT OFF @41 RPM. PERFORMED ECU BITE PROCEDURES IAW FIM TASK 49-11 FT 815. FOUND PT SENSORS DELTA P SENSORS & P2 SENSORS AND MSep 15, 2019 · N1373A · Boeing 76731KSDR ASAA2019091230702Exciter · failedAPU FAULT LIGHT ILLUMINATED DURING START. FAULT LIGHT EXTINGUISHED AFTER 5 MINUTES. GROUNDED - YES. APU WOULD NOT START, TRIED TWICE. REMOVED AND REPLACED APU EXCITER UNIT IAW AMM 49-41-31-000-801 AND 49-41-31-400-801, ETOPS GROUND FUNCTIONAL CHECK GOOD IAW AMSep 12, 2019 · N530AS · Boeing 737890SDR UIEA2019091205489Unknown · malfunctionedITEM 1 - APU COLD SOAK START FL 360 -51 TEMP, 21:52Z; 3 ATTEMPTS UNSUCCESSFUL. ITEM 2 - APU FAULT EICAS. NOTED BY MX, DMI CONTINUES FOR APU COLD SOAK, MCC ADVISED. ITEM - 2: PERFORMED APU BITE PROCEDURE IAW FIM 49-11 FT 987. ECU LRU FAULTED, CLEARED FAULT, APUSep 12, 2019 · N1409A · Boeing 767306SDR UIEA2019090905463Unknown · malfunctionedAPU FAULT ON TAXI IN UNSUCCESFUL START THREE TIME. PERFORMED APU OPERATION CHECK WITH LOAD IAW AMM 49-11-00. FOUND SATISFACTORY AT THIS TIME.Sep 6, 2019 · N1487A · Boeing 76731KSDR UIEA2019090905464Unknown · malfunctionedAPU COLD SOAK START FAILED THREE ATTEMPTS FL 410 -55 SAT. PERFORMED APU ECU BITE TEST IAW AMM 49-61-05. NO FAULTS NOTED AT THIS TIME. VF OPENED DMI# 117364. APU COLDSOAK START ATTEMPT SUCCESSFUL ON FIRST ATTEMPT, DMI CLOSED. ECM 2019P-392 TO ISSUED BY PP ENGINSep 6, 2019 · N1489A · Boeing 76731KSDR UIEA2019083105408Unknown · malfunctionedAPU FAILED TO START UPON LANDING AT RFD. SECOND ATTEMPT FAILED AS WELL WITH "APU FAULT" EICAS MESSAGE. PERFORMED BITE TEST IAW FIM 49-11 FAULT TREE 958. NO FAULTS FOUND AT THIS TIME.Aug 30, 2019 · N1427A · Boeing 767306SDR UIEA2019082905321Control Valve · malfunctionedAPU FAILED TO START AFTER 3 ATTEMPTS, APU FAULT LIGHT DISPLAYED. PERFORMED ECU BITE IAW B767 FIM 49-11 F/T 987, NO FAULTS NOTED. RESET PER FIM, APU STARTS FIRST ATTEMPT IAW AMM 49-11-00. PACK AND ELECTRICAL LOAD NORMAL. APU INOP DUE TO AUTO SHUTDOWN. REMOVEAug 29, 2019 · N1487A · Boeing 76731KSDR UIEA2019083005393Unknown · malfunctionedAPU FAILED TO START ONCE A/C LANDED IN ONT. PERFORMED FIM 49-11 FT 987 APU BITE, FLAG 34 FAULT. CLEARED FAULT AND PERFORMED OPS CHECK. OPS CHECK NORMAL AT THIS TIME IAW AMM 49-11-00.Aug 29, 2019 · N1427A · Boeing 767306SDR ASAA2019082873522Warning Message · false activationMECH'S REPORT AFTER APU START/SHUTDOWN, CURRENT STATUS AND MAINT MESSAGE START 0 SHOWS FAULT " START POWER UNIT SHOWS HIGH TEMPERATURE - 49-41255". GROUNDED - YES. PERFORMED B737-800 FIM 49-40 TASK 815 - INITIAL EVALUATION APU START/RUN/STOP VERIFIES DISCREP. Aug 27, 2019 · N581AS · Boeing 737890SDR UIEA2019082805312Apu · malfunctionedAPU WOULD NOT START AFTER LANDING, TWO ATTEMPTS. APU FAULT EACH TIME. PERFORMED ECU BITE IAW FIM 49-11 FT 987. RESET ECU, APU OPERATION NORMAL.Aug 27, 2019 · N1487A · Boeing 76731KSDR UIEA2019082605293Ecu · malfunctionedAPU RELIABILITY COLD START, 3 ATTEMPTS UNSUCCESSFUL. PERFORMED APU ECU BITE CHECK, FAULTED ECU. REMOVED AND REPLACED APU ECU WITH NEW. OPS CHECKED GOOD, PERFORMED 3 SUCCESSFUL STARTS. NO DEFECTS NOTED AT THIS TIME IAW AMM 49-61-05 AND AMM 49-11-00.Aug 26, 2019 · N1489A · Boeing 76731KSDR P5CA2019082760174Tru · failedFOUND P32 APU START TRU CIRCUIT BREAKER TRIPPED. REMOVED AND REPLACED APU START TRU AND OPERATIONAL CHECKED GOOD IAW AMM 24-32-04.Aug 24, 2019 · N644GT · Boeing 7673JHFSDR UIEA2019082735274Fault Message · false indicationAPU FAULT MESSAGE AFTER LANDING. CAPTAIN REPORTED 2 ATTEMPTS. PERFORMED BITE CHECK OF ECU, NO FAULTS NOTED IAW AMM 49-61-05. APU STARTED ON 3RD ATTEMPT (1ST BY MX), OPS CHECK GOOD.Aug 23, 2019 · N1361A · Boeing 76731BSDR AALA201908219012Contactor · burnedAIRCRAFT WAS GROUNDED: PILOT REPORTS APU FAULT LIGHT ILLUMINATED ON START. APU WOULD NOT START. ASSOCIATED ACRID SMELL AT ROW 33. MAINTENANCE INSPECTED AND FOUND THE APU CRANK CONTACTOR AT FAULT, INSPECTED ALL WIRES IN THE CONTACTOR AND FOUND NO WIRES DAMAGED.Aug 19, 2019 · N793AN · Boeing 777223SDR UIEA201908215229Unknown · fault messageAPU FAULT DURING APU START. NO APU FAULTS STORED IN ECU MAINTENANCE. APU STARTED ON FIRST ATTEMPT IAW AMM 49-11-00. APU RELIABILITY COLD SOAK START WAS ACCOMPLISHED ON FLT LEG KWI-HHN. START WAS SUCCESSFUL ON FIRST ATTEMPT.Aug 17, 2019 · N645GT · Boeing 767324SDR ASAA2019081963413Exciter · failedFAULT LIGHT ILLUMINATED AFTER ATTEMPTING TO START THE APU. GROUNDED - YES. REMOVED & INSTALLED NEW IGNITER PLUG LEAD, OPS CHECK GOOD, PER B737-800 AMM 49-41-52. REMOVED & INSTALLED NEW IGNITER PLUG, OPS CHECK GOOD, PER AMM 49-41-51.REMOVED & INSTALLED NEW IGNIAug 16, 2019 · N529AS · Boeing 737890SDR ASAA2019081953414Converter · inoperativeAPU GENERATOR REQUIRED SEVERAL ATTEMPTS BEFORE IT PROVIDED ELECTRICAL POWER. APU WAS RUNNING AND BLUE APU GEN OFF BUS ILLUMINATED BUT VOLT AND FREQUENCY METER INDICATED 0 VOLTS. GROUNDED - YES. REMOVED AND REPLACED START CONVERTER UNIT REF B737-800 AMM 49-41-6Aug 15, 2019 · N581AS · Boeing 737890SDR UIEA2019081645169Exciter · failedAPU HAD NO LIGHT OFF. PREFORMED OPS CHECK IAW AMM 49-11-00-802-002. APU SPOOLED TO 14 PERCENT AND NO FURTHER WITH NO AUDIBLE IGNITER INDICATION. PERFORMED BITE TEST IAW 49-11 FT & 958. LAST RUN FAULT NO LIGHT OFF WITH MINI FLAG OK. REMOVED AND REPLACED APU Aug 14, 2019 · N1511A · Boeing 767383SDR UIEA2019081505190Ecu · unknownAPU BITE MESSAGE ON EICAS DURING APU RUN. NO FAULTS ON ECU. REMOVED AND REPLACED APU ECU IAW AMM 49-61-05.</P>)Aug 14, 2019 · N1427A · Boeing 767306SDR ASAA2019081203369Exciter · faultedAPU FAULT LIGHT ILLUMINATED ON START. 1ST ATTEMPT. GROUNDED - YES. ATTEMPTED APU START. NO-START, BITE CHECK RECEIVED FAULT MESSAGE 49-41011 NO FLAME SHUTDOWN. REF B737-800 FIM 49-40 TASK 802. PERFORMED GVI OF TAILCONE & ADJACENT CONTROL SURFACES FOR DAMAGE, NAug 10, 2019 · N590AS · Boeing 737890SDR NACA2019081490097Starter · inoperativeAPU WOULD NOT START. REMOVED AND REPLACED APU STARTER IAW AMM 49-41-01. OPS CHECK NORMAL MEL 49-11-01. CLEARED. 8-10-2019 AT 1643Z.Aug 9, 2019 · N379CX · Boeing 767323SDR UIEA2019080984971Apu · malfunctionedAPU FAILED TO START AFTER LANDING. PERFORMED BITE CHECK OF ECU ABOUT START MESSAGE IAW AMM 49-61-05, SYSTEM TEST OK. PERFORMED PHYSICAL OIL CHECK AND SERVICED APU OIL IAW AMM 12-13-04. APU STARTED NORMAL ON 2ND ATTEMPT. OPS CHECK GOOD.Aug 8, 2019 · N1361A · Boeing 76731BSDR NACA2019080620096Apu · faultedAPU FAILED TO START TWICE ON THE GROUND, EGT STALLED AT AROUND 775 FOR 15 SECONDS BEFORE FAULT. OPENAug 4, 2019 · N351CM · Boeing 767323SDR UIEA2019080404942Starter · failedAPU RELIABILITY COLD START ACCOMPLISHED ON FLIGHT LEG ONT-RFD SAT -46, FL 410, 3 ATTEMPTS UNSUCCESSFUL.(<P>NOTED BY MX. THIS CLOSES MDDR 115734, APU DEFERRED. REF LP 1091648 - ITEM 7.</P><P>LP 1091648 - M7: TRANSFERRED TO MDDR # 115774 IAW DDG 49-11-01A, CAT 'Aug 3, 2019 · N1487A · Boeing 76731KSDR UIEA2019080634937Actuator · failedAPU COLD SOAK START FL 380, -43 C, THREE ATTEMPTS UNSUCCESSFUL. PERFORM APU BITE CHECK IAW FIM 49-11- FT 987. FOUND MINI FLAG 36, 38, 42, 66. FAULTS ECU SCV DRIVER SHORTED, ECU IGV ACTUATOR FAIL AND POSITION OF IGV NOT MATCHING. R & R APU IGV ACTUATOR IAW AAug 2, 2019 · N1487A · Boeing 76731K
Back to JASC 4940