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 HALA2021092000120Exciter · faultedETOPS - ON LANDING - APU AUTOSHUTDOWN APU FAULT APU INOP -3 START ATTEMPTS // TROUBLESHOT PER A330 TSM 49-41-00-810-812-A.CMM FAULTS IGNITION. EXCITER AND IGNITERS. R/R IGNITION EXCITER PER A330 AMM 49-41- 38. CHANGED IGNITERS PER A330 AMM 49-41-38. ASep 18, 2021 · N361HA · Airbus A330243SDR UIEA2021092002058Apu · false indicationAPU DOOR STATUS MSG(<P><SPAN>PERFORMED FIM 49-11 FAULT TREE 959, APU STARTING PROBLEMS. NO DEFECTS FOUND. PERFORMED APU BITE PROCEDURE IAW FIM 49-11 FAULT TREE 958. NO FAULTS FOUND AT THIS TIME. STARTED AND SHUTDOWN APU MULTIPLE TIMES IAW B767 AMM 49-11-00. OSep 17, 2021 · N1511A · Boeing 767383SDR UIEA2021091502022Ignition Lead · faulty"APU FAULT" EICAS ON FIRST START AFTER LANDING. 2ND ATTEMPT OK.(<P>TRANSFERRED TO MDDR #153504 IAW MEL 49-11-01A CAT "C" DUE 24SEP21.</P> / <P>15SEP21 - LP 1397862 ITEM 4 - ONT - R/R APU EXCITER IAW AMM 49-41-03. OPS CHECK APU PER AMM 49-00-00. OPS CHECKS GOODSep 14, 2021 · N1427A · Boeing 767306SDR UIEA2021091302019Apu · fault messageAPU FAULT, 3 ATTEMPTS ON GROUND.(<P>STARTED APU ON FIRST TRY - OIL QTY READING 0.50 - APU OPS CKS OK PER AMM 49-41-00</P>)Sep 13, 2021 · N641GT · Boeing 76738ESDR P5CA2021091300343Ignition Unit · inoperativeAPU FAILS TO START WITH NO IGNITION HEARD.(<P>APU ECU BITE C/OUT. LRU FAULTY-IGN UNIT FAULTED. T/SHOOTING C/OUT IAW FIM 49-11 FAULT TREE A10. APU IGNITION UNIT REQ'S REPLACEMENT. NIL SPARES AVAILABLE. OPERATE IAW MEL 49-11-01A. HMG TEST SATIS IAW AMM 24-25-00-Sep 13, 2021 · N643GT · Boeing 7673JHFSDR UIEA2021091102004Motor · faultedAPU RELIABILITY COLD START ON FLT LEG RFD-SCK SAT -56C FL400: 3 START ATTEMPTS, ALL UNSUCCESSFUL.(<P>REMOVED AND REPLACED APU STARTER MOTOR IAW B767-300 AMM 49-41-01. OPS CHECK NO FAULTS AT THIS TIME</P>)Sep 11, 2021 · N1229A · Boeing 767306SDR ASAA2021090935933Ecu · intermittentAPU FAULT LIGHT ILLUMINATED ON START. GROUNDED - YES. PERFORMED BITE CHECK, NO CURRENT FAULTS, FAULT HISTORY SHOWS FAULT CODE 49-15004. THIS FAULT CODE HAS HISTORY SINCE 04/14/2021. REFERENCING B737-800 FIM 49-10 TASK 806, VERIFIED APU INLET DOOR ACTUATOR AND Sep 9, 2021 · N512AS · Boeing 737890SDR ASAA2021090435865Converter · faultedAFTER LANDING APU DIDN'T START, FAULT LIGHT ILLUMINATED FOR A FEW MINUTES. GROUNDED - YES. FOUND FAULT 49-41254 ACTIVE, PERFORMED B737-9 IFIM TASK 49-40-00-810-818. FOUND NO WIRING FAULTS. REPLACED START CONVERTER UNIT M1710 REF B737-9 AMM 49-41-61/401. ALL TESep 4, 2021 · N918AK · Boeing 7379SDR ASAA2021090335867Igniter · inoperativeAPU IS INOPERATIVE, NO IGNITION AND APU FAULT LIGHT ILLUMINATED AFTER START SWITCH ACTIVATION. GROUNDED - YES. REMOVED AND REPLACED IGNITER PLUG PER B737-900 AMM 49-41-51, AND REMOVED AND REPLACED IGNITER PLUG LEAD PER AMM 49-41-52. OPS CHECK GOOD.Sep 3, 2021 · N435AS · Boeing 737990ERSDR ASAA2021090235868Ecu · faultedAMBER FAULT LIGHT ILLUMINATED FOR APU ON INITIAL START. GROUNDED - YES. REF B737-9 AMM 49-61-12, REMOVED/REPLACED APU ECU. VERIFIED ECU SOFTWARE INSTALLED IS CORRECT PER IPC. APU BITE PROCEDURE AND STARTING/OPERATION GOOD REF AMM 49-61-00. GROUND VERIFICATION Sep 2, 2021 · N291BT · Boeing 7379SDR NACA2021082800002Ecu · faultedDISCREPANCY: APU FAULT AFTER LANDING, 3 ATTEMPTS. CORRECTIVE ACTION: PERFORMED ECU RESET, APU IS WORKING GOOD IAW AMM 49-61-00. MX CONTROL REQUESTED CHECK APU FOR OIL LEAKS, NO LEAKS FOUND IAW B767 49-11-01Aug 28, 2021 · N379CX · Boeing 767323SDR QXEA2021082700420Igniter · malfunctionedAPU FAILED TO START - SMOKE OBSERVED FROM EXHAUST DURING START. PLACED ON MEL 49-00-1. CLEARED 8/27. INTERROGATED CDS, FOUND MULTIPLE HITS FOR FAULT "055/2 IGNITER PLUG B OPEN" IN FAULT HISTORY. REPLACED BOTH IGNITERS REF Q400 AMM 49-40-04-000-801 AND 49-40-04Aug 26, 2021 · N445QX · Bombdr DHC8402SDR UIEA2021081701817Apu · faultedAFTER LANDING APU WOULD NOT START (3 ATTEMPTS MADE)(<P>APU GRND STARTED BY MAINT W/ NO FAULTS NOTED. BITE AND SELF TEST PER AMM 49-61-05. NO FAULTS NOTED.</P>)Aug 16, 2021 · N1487A · Boeing 76731KSDR UIEA2021081601808Ecu · faulted10 SECONDS AFTER SELECTING AU HYD PUMPS ON DURING BEFORE START APU COMPLETELY SHUT DOWN ALARM SOUNDED.(<P>TRANSFERRED TO MDDR 151805 PER MEL 49-11-01-01. APU PNEUMATICS INOP, CAT C, DUE DATE 23AUG21. DDG 36-11-04 COMPLIED WITH.</P> / <P>LP 1370461 - 14AUG21 - Aug 13, 2021 · N1489A · Boeing 76731KSDR UIEA2021081321768Ecu · dirtyAPU FAULT ON TAXI IN(<P><SPAN>PERFORMED APU BITE IAW AMM 49-61-05. CLEARED ECU. APU START NORMAL ON 1ST ATTEMPT. OK FOR SERVICE</SPAN></P>)Aug 10, 2021 · N1487A · Boeing 76731KSDR P5CA2021081300314Gcu · faultedAPU ELEC INOP(<P>TRANSFERRED TO DMI 151562 IAW MEL 49-11-01A CAT C.</P> / <P>LP<SPAN>1483980:</SPAN><SPAN> RERACKED APU GCU AND OPER CHECKED OK PER AMM 24-22-08/401 & 49-11-00/501. THIS CLEARS MDDR 151562.</SPAN></P>)Aug 10, 2021 · N643GT · Boeing 7673JHFSDR ASAA2021081035674Converter · faultedAPU NO START / NO ROTATION FAULT LIGHT ILLUMINATED. GROUNDED - YES. REF TSR711069 PERFORMED APU OPERATIONAL TEST REF B737-800 AMM 49-11-00. NO DISCREPANCY WITH START, ELECTRICAL POWER AND APU BLEED AIR. NO CURRENT STATUS FAULTS LOGGED. PRECAUTIONARY, REMOVED/Aug 10, 2021 · N596AS · Boeing 737890SDR NACA2021080700001Control Unit · faultedDISCREPANCY: APU FAULT ON START ATTEMPT ON THE GROUND. CORRECTIVE ACTION: PERFORMED APU CONTROL UNIT BITE TEST, MESSAGE RESET BOX IAW AMM 49-61-05. OPERATED SEVERAL TIMES AND WORKS NORMAL IAW AMM 49-11-00Aug 7, 2021 · N379CX · Boeing 767323SDR UIEA2021080401700Charger · inoperativeAFTER LANDING APU WOULD NOT START AFTER 3 ATTEMPTS(<P>PERFORMED FIM TASK 49-11 F/T 959. FOUND APU BATTERY CHARGER NOT WARNING PROPERLY. REMOVED AND REPLACED APU BATTERY CHARGER IAW AMM 24-31-05. STARTED APU SUCCESSFULLY 3 TIMES. OPS CHECK GOOD. NO OTHER DEFECTAug 4, 2021 · N1373A · Boeing 76731KSDR ASAA2021073135598Converter · malfunctionedAFTER LANDING IN SEA STARTED APU COULD NOT GET APU GENERATOR TO COME ONLINE. GROUNDED - YES. CURRENT FAULTS SHOW 49-41245 AND 49-41254. REMOVED AND REPLACED START CONVERTER UNIT REF B737-900 AMM 49-41-61-000/400-801. CURRENT STATUS SHOWS NO FAULTS. GROUND VERIJul 31, 2021 · N481AS · Boeing 737990ERSDR ASAA2021073035599Exciter · shortedAPU FAULT LIGHT ILLUMINATED SHOWS FAULT CODE 49-41180 IGNITION UNIT CIRCUIT SHOWS HIGH CURRENT. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 49-40 TASK 804, REMOVED AND REPLACED IGNITION UNIT REF B737-800 AMM 49-41-31 AND AS PRECAUTION REMOVED AND REPLACED IGNITEJul 30, 2021 · N586AS · Boeing 737890SDR UIEA2021080201676Ignition Unit · inoperativeAPU FAULT ON ARRIVAL(<P>PERF APU BITE PER AMM 49-61-05, IGN UNIT LRU FAULT SHOWN, FOLLOWED FIM 49-11 FT 819. REMOVED AND REPLACED IGNITION UNIT IAW AMM 49-41-03, PERFORMED MULITIPLE APU START UPS. ALL ATTEMPTS SUCCESSFUL, NO FURTHER DEFECTS NOTED</P>)Jul 30, 2021 · N1427A · Boeing 767306SDR HALA2021072900090Igniter · failedETOPS - WHILE TAXING IN AFTER LANDING APU ABORTED ITS START ECAM MESSAGE APU FAULT // REMOVED AND INSTALLED EGNITER PLUG IAW 49-11-41, REMOVED AND INSTALLED ELECTRICAL LEAD IAW 49-11-43 , REMOVED AND INSTALLED IGNITION UNIT 49-41-39 PERFORMED OPERATION TEST OJul 30, 2021 · N220HA · Airbus A321271NSDR NACA2021072700001Apu · faultedDISCREPANCY: APU FAILED TO START. CORRECTIVE ACTION: PERF TS IAW FIM 49-11-05/FT 958 NO FAULTS FOUND. OPS CHECK GOOD (PERF APU BITE CHECK). ETOPS 180 GROUND VERIFICATION COMPLETED.Jul 27, 2021 · N379CX · Boeing 767323SDR HALA2021072200088Starter · failedETOPS - WHEN TRYING TO START APU AFTER LANDING ECAM APU FAULT AUTO SHUT DOWN // REMOVED AND REPLACED APU STARTER PER AMM 49-42-51. OPS TEST OK. OK FOR SERVICE MOTOR, STARTER, OFF 33-4941-9-0001 S/N 00051 ON 33-4941-9-0001 S/N 00081Jul 22, 2021 · N360HA · Airbus A330243SDR NACA2021072200001Apu · faultedAPU FAULT ON TWO START ATTEMPTS @ KMIA. PERFORMED APU BITE, TEST OK. OPS CHECK NORMAL IAW B767 AMM 49-61-05Jul 22, 2021 · N379CX · Boeing 767323SDR UIEA2021072201612Exciter · faultedAPU WILL NOT START "GCU" SPARKS "IGN BOX" FAULT(<P>REMOVED AND INSTALLED SERVICEABLE IGNITION EXCITER IAW AMM 49-41-03. APU STARTS AND FUNCTIONS PROPERLY </P>)Jul 20, 2021 · N1327A · Boeing 76737DSDR ASAA2021072035463Warning Light · false activationAPU FAILED TO START WITH ACCOMPANYING FAULT LIGHT. GROUNDED - YES. APU BITE SHOWS IGN UNIT HIGH CURRENT (MAINT MSG 49-41180) NO FLAME SHUTDOWN. TAIL INSP NORMAL. PERFORMED B737-800 FIM 49-40 TASK 804. INITIAL EVALUATION. IT WAS INTERMITTENT FAULT. OPS CHECK APJul 20, 2021 · N586AS · Boeing 737890SDR UIEA2021071401544Contactor · faultedAPU WOULD NOT START AT BLOCK IN. EICAS MESSAGE APU FAULT BOTH TIMES.(<P>PERFORMED APU BITE PROCEDURE REF B767 FIM 49-11 FT 987. FOUND MINIFLAG 34 AND "START ABORTED" MESSAGE. PERFORMED B767 FIM 49-11 FT 989 AND FOUND NO FURTHER DEFECTS. RESET ECU AND STARTED AJul 13, 2021 · N1499A · Boeing 767328SDR NACA2021071200001Apu · failedDISCREPANCY: FLIGHT CREW VERBAL, APU FAILED TO START AFTER LANDING. CORRECTIVE ACTION: ACCOMPLISHED FIM 49-11 FT 958, FOUND "START ABORTED" FAULT. RESET ECU AND APU STARTING PROCEDURES, OPS CHECK GOOD. PER 767 AMM 49-11-00. AC REMAINS ETOPS.Jul 12, 2021 · N379CX · Boeing 767323SDR NACA2021070900001Apu · failedAPU WAS INOPERATIVE. REMOVED AND REPLACED APU IAW B767 AMM 49-11-01.Jul 9, 2021 · N351CM · Boeing 767323SDR UIEA2021070901499Apu · faultedAPU RELIABILITY COLD START ACCOMPLISHED ON FLT LEG ONT-CVG SAT -48°C FL 370 START UNSUCCESSFUL ON 3 ATTEMPTS. APU FAULT MESSAGE OCCURRED DURING APU RELIABILITY COLD START(<P>ITEM# 1 - ENG SNAPSHOT INFO NOTED BY MX. SEE NEXT DISC. ITEM FOR APU COLD SOAK FAIL..Jul 8, 2021 · N1499A · Boeing 767328SDR NACA2021070400001Apu · faultedAPU FAULT DURING GROUND START ATTEMPT. PERFORMED APU BITE PROCEDURE 49-11 FT 958, FIG 103, SYSTEM CHECKED NORMALJul 4, 2021 · N351CM · Boeing 767323SDR NACA2021070300001Apu · malfunctionedDISCREPANCY: APU WON'T START. CORRECTIVE ACTION: ACCOMPLISHED BFCU BITE TEST PER 24-20 FT 814. FOUND FAULT "EXT PWR PIN E-F FAILURE". RESET AND OPS CHECKS GOOD. ACCOMPLISHED APU STARTING PROCEDURES PER AMM 49-11-00, OPS CHECK GOOD.Jul 3, 2021 · N351CM · Boeing 767323SDR UIEA2021070601476Ecu · faultedAPU WILL NOT START(<P>T/S PER FIM 49-11 FAULT TREE 958 . FOUND ECU TO BE AT FAULT , REMOVED AND REPLACED APU ECU IAW AMM 49-61-05.OPS CKS GOOD , APU STARTED NORMAL.</P>)Jul 3, 2021 · N1619A · Boeing 7673Y0SDR UIEA2021070201465Apu · faultedAPU WOULD NOT START. APU FAULT EICAS MSG. THREE START ATTEMPTS(<P>C/W APU OPS CHECK IAW AMM 49-05-00. APU START SUCCESSFUL MULTIPLE TIMES. OPS CHECK GOOD AT THIS TIME. A\C OK FOR SERVICE.</P>)Jul 1, 2021 · N1361A · Boeing 76731BSDR UIEA2021063001443Apu · malfunctionedAPU FAIL TO START. REMOVED AND REPLACED APU IAW AMM 49-11-01. OPS CHECK OK, NO LEAKS NOTEDJun 30, 2021 · N649GT · Boeing 767375SDR UIEA2021062801428Ecu · inoperativeAPU INOP.(<P>TRANSFER TO MDDR 149250 CAT "B" IAW DDG 49-11-01B</P> / <P>28JUN21 - 1484416 - ITEM# 3 - BWI - R/R ECU IAW B767 AMM 49-61-05 OPS CK GD. NO FAULTS, THIS CLEARS MDDR 149250. MCC NOTIFIED AND PLACARD REMOVED.</P>)Jun 26, 2021 · N649GT · Boeing 767375SDR UIEA2021063001445Apu · malfunctionedAPU COLD START UNSUCCESSFUL 3 START ATTEMPTS -16C / FL 360(<P>NOTED BY MX PERFORMED FIM 49-11 FLT 958 MINI FLAG 141 LRU"START ABORT" RESET CLEARED </P>)Jun 25, 2021 · N649GT · Boeing 767300SDR ASAA2021062435187Power Unit · faultedAPU FAULT LIGHT ON AFTER START RAN CHECKLIST RESTART GOT FAULT ALSO. GROUNDED - YES. FAULT HISTORY SHOWED 2 NO APU ROTATION SHUTDOWN, MAINT MSG 49-41012. ATTEMPTED START, APU WOULD NOT START. 49-41012 MSG SHOWED. T/S REF B737-900 FIM 49-40 TASK 803. SUSPECT SJun 24, 2021 · N433AS · Boeing 737990ERSDR UIEA2021063001447Apu · malfunctionedAPU STARTS UNSUCCESSFUL / 3 START ATTEMPTS (COLD SOAK) / -23 DEGREES CELCIUS / FL 390 / MAX RPM 33% 815 DEGREE(<P>NOTED BY MX BITE PERFORMED ON ECU IAW B767 FIM 49-11 FT 858</P>)Jun 23, 2021 · N649GT · Boeing 767300SDR CALA2021062300938Igniter · failedAPU IGNITER PLUG BAD. TRANSFERRED TO HANGAR NON ROUTINE 9777443Jun 22, 2021 · N62884 · Boeing 737924ERSDR UIEA2021062101393Unknown · unknownAPU FAULT, APU WOULD NOT START, THREE ATTEMPTS MADE.(<P>FOUND APU OIL LEVEL LOW. SVCD APU IAW AMM 12-13-04. PERF FIM 49-11 FT 987. NO DEFECTS AT THIS TIME. PERF OPS IAW AMM 49-11-00. OPS CHECK GOOD. ECU BITE CHECK GOOD, NO ACTIVE FAULTS. LEAK CHECK GOOD.</P>)Jun 20, 2021 · N1361A · Boeing 76731BSDR UIEA2021061201339Battery · failedAPU FAILED TO START AFTER TWO ATTEMPTS, REPEAT WRITE UPS(<P>TRANSFERRED TO MDDR 148462 IAW MEL 49-11-01A, CAT C, DUE DATE 22JUN21.</P> / <P>17JUN21 - 1341786 - ITEM# 2 - MEM - REMOVED AND REPLACED APU BATTERY IAW B767-300 AMM 24-31-04. OPS TEST GOOD. 6X GOOD SJun 12, 2021 · N663GT · Boeing 767324SDR I5PA2021061275701Ecu · faultyAPU AUTO SHUTDOWN ON BLOCK IN. APU ECU FOUND FAULTY. ECU REPLACED AND APU CONFIRMED OPERATIONAL.Jun 12, 2021 · N757QM · Boeing 75729JSDR UIEA2021060801290Ecu · faultedAPU INOP. APU FAILED COLD SOAK START(<P>THIS BECOMES MDDR 148218 PER MEL 49-11-01A, CAT C, DUE 18JUN21. PERFORMED APU FIM 49-11 FAULT TREE 958 AND FOUND CODE 01 ON ECU DURING BITE. </P><P>LP 1465341: REMOVED AND REPLACED APU ECU IAW AMM 49-61-05. OPS CHECK GOOJun 8, 2021 · N1373A · Boeing 76731KSDR UIEA2021060801292Warning Message · false indicationAPU FAULT EICAS(<P>PERFORMED ECU BITE TEST IAW AMM 49-61-05, OPERATIONAL TEST OK.</P>)Jun 8, 2021 · N662GT · Boeing 76731ASDR UIEA2021060501271Ecu · faultedAPU FAILED TO START(<P>TRANSFERRED TO MDDR# 148078 IAW MEL 49-11-01A, CAT C, DUE 15JUN21. REMOVED AND REPLACED APU FCU IAW AMM 49-31-01-644-045. OPS CHECKED GOOD. NO LEAKS NOTED.Jun 5, 2021 · N663GT · Boeing 767324SDR UIEA2021060701278Apu · faultedINFO ONLY APU START UNSUCCESSFUL AT FL410 AT -61 DEGREES C AND FL260 AT -27 DEGREES C, APU START SUCCESSFUL ON GROUND.(<P>NOTED BY MX. PERFORMED BITE CHECK OF APU ECU, NO FAULTS NOTED; MEL # 147790 REMAINS OPEN.</P>)Jun 5, 2021 · N649GT · Boeing 767375SDR UIEA2021060701289Apu · faultedAPU RELIABILITY COLD START ATTEMPTED. SAT -49DEGREES C, FL 340. START UNSUCCESSFUL AFTER THREE ATTEMPTS. APU FAULT EICAS MESSAGE.(<P>NOTED BY MX. MEL # 147790 FOR COLD SOAK REMAINS OPEN.</P>)Jun 4, 2021 · N649GT · Boeing 767375
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