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 UIEA2021060701287Apu · malfunctionedAPU RELIABILITY COLD SOAK START ATTEMPTED. SAT -60 DEGREES C, FL 400. START UNSUCCESSFUL AFTER THREE ATTEMPTS.(<P>NOTED BY MX. MEL # 147790 FOR COLD SOAK REMAINS OPEN.</P>)Jun 3, 2021 · N649GT · Boeing 767375SDR UIEA2021060101214Tru · faultedAPU FAULT ON FIRST ATTEMPT START OK(<P>TRANSFERRED TO DMI # 147866 CAT C DUE DATE 11 JUN 21 IAW DDG 49-11-01A </P><P>CVG MX, 01JUN21 LP 1306574, ITEM M8: PERFORMED FIM 49-11 TREE 959 & FIM 49-11 963, FIM LEAD TO APU TRU. REMOVED & REPLACED APU TRU IAW 767 AMM Jun 1, 2021 · N1181A · Boeing 7673Y0SDR UIEA2021053101209Motor · failedAPU FAILED TO START(<P>TRANSFERRED TO DMI 147803 IAW MEL 49-11-01B. COMPLIED WITH MAINT. PROCEDURES.</P><P>05JUN21 - LP 1281673: REMOVED AND REPLACED APU STARTER ASSEMBLY IAW B767-300 AMM 49-41-01. OPS CHECKED GOOD. THIS CLEARS MDDR 147803. MCC NOTIFIED.May 31, 2021 · N663GT · Boeing 767324SDR UIEA2021052401173Apu · faultedAPU COLD SOAK START FAILED 3 ATTEMPTS FL380, SAT-45(<P>OPS CHK APU PER AMM 49-11-00. CHK GOOD. NO FURTHER ACTION REQ AT THIS TIME.</P>)May 22, 2021 · N1373A · Boeing 76731KSDR ASAA2021051534821Eec · faultedAPU WONT START (LOW OIL PRESSURE AND FAULT LT ON). GROUNDED - YES. PERFORMED APU BITE B737-800 FIM 49-60-TASK 801. NO ACTIVE FAULTS FOUND. HISTORY SHOWED SEVERAL 49-15004. DUE TO HISTORY REMOVED AND REPLACED ECU REF B737-800 49-61-12/401. STARTED AND RAN APU 4May 15, 2021 · N512AS · Boeing 737890SDR UIEA2021051801141Ecu · faultedAPU FAULT NO START 3 ATTEMPTS.(<P>PERFORMED APU BITE CHECK ON ECU IAW B767 FIM 49-11 FT 958. MINI FLAG- "OK" LRU FAULTS- "NO LIGHT OFF". RESET CLEARED.</P>)May 14, 2021 · N649GT · Boeing 767375SDR UIEA2021051401132Apu · faultedAPU FAULT- NO START @ FL 380- 3 ATTEMPTS- RPMS STOPPED @ 25- THEN FAULT MSG. COLD SOAK START UNSUCCESSFUL.(<P>NOTED BY MX, PERFORMED ECU BITE IAW B767 FIM 49-11 FT 958, MINI FLAGS "OK". LRU FAULTS LAST ATTEMPT "NORMAL STOP" 2,3,4 "NO LIGHT OFF", RESET CLEARED,May 14, 2021 · N649GT · Boeing 767375SDR ASAA2021051334830Ignition Unit · faultedFOLLOWUP TO RECENT APU FAULTS. ETOPS SIGNIFICANT SYSTEM TASK AFFECTS APU ON DEMAND IN-FLIGHT START CAPABILITY. UPON COMPLETION, CONTACT MAINTENANCE CONTROL AND REPORT THAT THIS TASK HAS AFFECTED APU IN-FLIGHT START CAPABILITY, MEL 49- 99A IS REQUIRED PRIOR TO May 13, 2021 · N577AS · Boeing 737890SDR I5PA2021051188802Ecu · faultedAPU BLEED FOUND INOP DUE TO A FAULTY ECU DURING THE BITE PROCEDURES. ECU WAS REPLACED AND APU BLEED WAS RESTORED.May 11, 2021 · N888LT · Boeing 757230SDR NACA2021051300002Starter · inoperativeDISCREPANCY: APU INOPERATIVE. CORRECTIVE ACTION: REMOVED AND REPLACED APU STARTER PER AMM 49-41-01. OP CHECK GOOD. ETOPS SS'S.May 8, 2021 · N351CM · Boeing 767323SDR QXEA2021050300211Igniter · faultedRAMP REPORTED SMOKE & FIRE SHOOTING OUT APU EXHAUST FOR A FEW SECONDS AFTER START UP. PLACED APU ON MEL. 5/1/21 PERFORMED OPS CHECK OF APU PER AMM TASK 49-00-00-710-801. OPS CHECK GOOD. STARTED 2 ADDITIONAL TIMES- NO SMOKE OR FLAMES NOTED. INTERROGATED CDS ANDApr 30, 2021 · N403QX · Bombdr DHC8402SDR UIEA2021042701013Apu · malfunctionedAPU INOP. PERFORMED APU BITE PROCEDURE, CLEARED FAULT. APU STARTED ON FIRST ATTEMPT. IAW AMM 49-11-01. NO DEFECTS NOTED.Apr 27, 2021 · N1709A · Boeing 767375SDR UIEA2021042500990Starter · faultedAPU RELIABILITY COLD START ACCOMPLISHED ON FLT LEG ILN-ONT. SAT-59, FL 360. START UN-SUCCESSFUL ON 3 START ATTEMPTS.(<P>APU BITE SHOWS "A/C START CIRCUIT" FAULT FOR PREVIOUS 3 ATTEMPTS. FIM 49-11 FAULT TREE 962, FOUND SUSPECT TERMINALS AT APU START MOTOR AT BLApr 25, 2021 · N1373A · Boeing 76731KSDR ASAA2021042234658Apu · malfunctionedAPU WON'T START WITH A FAULT INDICATOR. ATTEMPTED 2ND START AFTER FAULT LIGHT EXTINGUISHED. 2ND APU START ATTEMPT FAILED WITH ANOTHER FAUL LIGHT. GROUNDED - YES. REF L/P 60125976 APU CSS SUCCESSFUL FL 350. REMOVED MEL 49-99A.Apr 22, 2021 · N570AS · Boeing 737890SDR UIEA2021042300984Relay · failedAPU RELIABILITY COLD START UNSUCCESSFUL ON FLT ILN-PDX AFTER 3 START ATTEMPTS. STATUS MSG APU DOOR. NOTED BY MX. MULTIPLE APU STARTS ON GND NORMAL, 1ST ATTEMPT. APU INLET DOOR ACTUATOR CONNECTOR PLUG CLEAN & DRY, MOISTURE & FROST NOTED ON EMPENAGE. DMI 145628Apr 22, 2021 · N1373A · Boeing 76731KSDR UIEA2021042200961Filter · failedCREW REPORTED APU WOULD NOT START AFTER 3 ATTEMPTS(<P>TRANSFERRED TO MDDR 145677, CAT C, DUE 1 MAY 2021 PER MEL 49-11-01A. PLACARDS APPLIED. DISPATCH RS 1641.</P><P>22 APR 21 - LP 1355446 ITEM 5 - SCK - REMOVED AND REPLACED APU GEN SCAVEGE FILTERS IAW AMM 49-2Apr 21, 2021 · N1619A · Boeing 7673Y0SDR ASAA2021042034657Starter · faultyTWO UNSUCCESSFUL STARTS OF THE APU, RECEIVED AMBER FAULT LIGHT ON BOTH TRIES. (ALSO NO RISE IN EGT). GROUNDED - YES. PER TROUBLE SHOOTING NOTES. REPLACED START POWER UNIT, START CONVERTER UNIT, ELECTRONIC CONTROL UNIT. OPENED/TAGGED 2CBS. RMVD AND INSTALLED ECApr 20, 2021 · N469AS · Boeing 737990ERSDR UIEA2021041600916Ecu · malfunctionedAPU AUTO SHUTDOWN. REMOVED & REPLACED ECU PER AMM 49-61-05. OPS CHECK IS NORMAL.Apr 14, 2021 · N649GT · Boeing 767300SDR UIEA2021041000873Apu · malfunctionedAPU FAULT 1ST START ATTEMPT, 2ND ATTEMPT SUCCESSFUL FOLLOWED BY GEN OFF. RESET APU GEN FOLLOWED BY APU AUTO SHUTDOWN.(<P>TRANSFERRED TO MDDR 145104 PER DDG 49-11-01B. MX PROCEDURES C/W PLACARDS INSTALLED.</P><P>PDX MX, LP 1254482, ITEM M3: C/W FIM 49-11 FT 958Apr 10, 2021 · N1373A · Boeing 76731KSDR UIEA2021040700846Starter · malfunctionedAPU FAULT EICAS MSG COMPIED WITH QRH 2ND AND 3RD START ATTEMPTS WERE UNSUCCESSFUL(<P>TRANSFERRED TO MDDR 1449.31 MEL 49-11-01A </P><P><SPAN>REMOVED AND REPLACED APU STARTER MOTOR. IAW AMM 49-41-01. PERFORMED 3 SUCCESSFUL APU STARTS. OPS CHECK NORMAL. NO DEFECTApr 6, 2021 · N1229A · Boeing 767306SDR UIEA2021040600841Exciter · inoperativeAPU INOP ( AUXILIARY POWER UNIT (APU), EXCEPT ER OPERATIONS BEYOND 120 MINUTES (NOTIFY DISPATCH) R120 )(<P>TRANSFERRED TO MDDR 144881 PER MEL 49-11-01B CAT B DUE 08 APR 21</P><P>07 APR 21 LP 1335073 ITEM 2 - HHN- R AND R APU ECU BITE OK APU STILL FAILS TO STAApr 5, 2021 · N649GT · Boeing 767375SDR UIEA2021040200786Unknown · unknownAPU COLD SOAK START UNSUCCESSFUL AFTER THREE ATTEMPTS.(<P>NOTED BY MX. PERFORMED OPS CHECK OF APU PER AMM 49-11-00. OPS CHECK GOOD. COLD SOAK START REQ PER MDDR 144694.</P>)Apr 2, 2021 · N1373A · Boeing 76731KSDR UIEA2021032100667Apu · malfunctionedAFTER 4 ATTEMPTS APU WILL NOT START. REACHES 25% 777 EGT, OIL QTY 75%(<P>PERFORMED APU BITE TEST PER 767 FIM TASK 49-11 FAULT TREE 958.</P><P>NO DISCREPANCY NOTED, APU OPERATING AT NORMAL CONDITIONS.</P>)Mar 23, 2021 · N640GT · Boeing 7673S1SDR UIEA2021032200678Apu · unknownAPU FAIL TO START(<P>ECU BITE CHECK IAW AMM 49-61-05. NO FAULTS NOTED. APU OPS TEST NORMAL.<BR /></P>)Mar 19, 2021 · N1489A · Boeing 76731KSDR UIEA2021031100520Lead · damagedAPU DID NOT START AFTER LANDING(<P>TRANSFERRED TO MEL 49-11-01B, MDDR 143683, CAT B, DUE 14MAR21. PLACARD INSTALLED.</P><P>LP 1273745: REMOVED AND REPLACED APU IGNITION LEAD, IGNITOR PLUG, IGNITION EXCITER IAW AMM 49-31-02, 49-31-03, 49-31-03. THIS CLEARS MDDRMar 11, 2021 · N645GT · Boeing 767324SDR UIEA2021031100521Apu · malfunctioned"APU FAULT" APU FAILED TO START AFTER 3 ATTEMPTS(<P>PERFORMED APU CONTROL UNIT BITE TEST REF AMM 49-61-05. TESTED NORMAL, STARTED APU NORMAL</P>)Mar 11, 2021 · N1489A · Boeing 76731KSDR UIEA2021030600482Ecu · malfunctionedAPU INOP(<P>TRANSFER TO MDDR 143411 IAW DDG 49-11-01A CAT C DUE DATE 16MAR.</P><P>LP 1334244: PERFORMED FIM 49-11 FT 869 FROM BLK 01 TO 27. REMOVED AND REPLACED APU ECU IAW AMM 49-61-05. SYSTEM OPERATIONAL. TEST OK. CLEARED MDDR 143411. PLACARD REMOVED. DISPATMar 6, 2021 · N662GT · Boeing 76731ASDR UIEA2021030500480Connector · unsecureUPON LANDING, TRIED STARTING APU AND RECEIVED "APU FAULT" EICAS MSG THREE START ATTEMPTS.(<P>DEFERRED IAW MEL 49-11-01B MDDR 143393 CAT B 08MAR21 PLACARD INSTALLED. DISP RS 1710. </P><P>LP 1273558: FOUND LOOSE CONNECTOR ON IGNITOR LEAD. IGNITOR PLUG CLEANED Mar 5, 2021 · N645GT · Boeing 767324SDR UIEA2021030800487Starter · inoperativeAPU RELIABILITY COLD START FLT LEG SCK-IAH SAT-62 FL410, START UNSUCCESSFUL AFTER 3 ATTEMPTS.(<P>REMOVED AND REPLACED APU STARTER DUE APU BITE TEST STARTER FAULT IAW AMM 49-41-01. OPS CHECK GOOD.</P>)Mar 5, 2021 · N1373A · Boeing 76731KSDR UIEA2021030800490Flow Divider · inoperativeAPU NOT STARTING UPON LANDING.(<P>REMOVED AND REPLACED FUEL FLOW DIVIDER IAW AMM 49-31-03. OPS CHECK GOOD.</P>)Mar 5, 2021 · N640GT · Boeing 7673S1SDR UIEA2021030500476Warning Message · false activationAPU "ALTN CONT" AND ENG START/ECS DISCRETES CB'S POPPED IN FLT. NO EICAS OR STATUS MSG. RESET C/B'S, PERFORMED APU BITE CK IAW FIM 49-11 F/T 958. NO FAULTS FOUND. PERFORMED 2 APU GROUND STARTS AND APU STARTS NORMAL. ACCOMPLISHED 2 ENG GROUND DRY MOTORS, IAW B7Mar 5, 2021 · N640GT · Boeing 7673S1SDR UIEA2021030500475Starter · failedAPU FAILED TO START. REMOVED AND REPLACED FAULTY STARTER PER 767 AMM 49-41-01. OPS CHECK GOOD 1ST START.Mar 4, 2021 · N1619A · Boeing 7673Y0SDR UIEA2021030200439Igniter · failedAPU FAULT NO START AFTER TWO ATTEMPTS APU DEFERRED IAW MEL 49-11-01B, MDDR 143195, CAT B, 05MAR2021. PLACARD INSTALLED. DISP GTC 0347Z.04MAR21 - LP 1273548 - ITEM# 6 - BWI -REMOVED AND REPLACED IGNITOR IAW AMM 49-41-02. OPS CHECKS GOOD. THIS CLEARS DMI 1431Mar 1, 2021 · N645GT · Boeing 767324SDR UIEA2021030100431Apu · malfunctionedAPU COLD START ATTEMPT -47C, FL 380, 3 START ATTEMPTS, 3 START FAILS, EGT 0 22 RPM(<P>PERFORMED APU BITE PER FIM 49-11 FT 958, MINI FLAG 34; LRU - "NO LIGHT OFF". RESET CLEARED, PERFORMED SUCCESSFUL GROUND START PER AMM 49-11-00. ECU SUMMARY- A/C START CIRCUITFeb 23, 2021 · N649GT · Boeing 767375SDR UIEA2021021900359Tru · malfunctionedAPU WON'T START(THIS BECOMES DMI NR 142640 IAW MEL 49-11-01A CAT C DDD 01MAR21 A/C DOWNGRADED TO NON ETOPS 19FEB21- LOG PG 1339208 ITM 4 - RIV - PERFORMED BITE OF ECU IAW FIM 49-11 FT958. FAULTED "A/C START CIRCUIT" PERFORMED FIM 49-11 F/T 991 UP TO SHEET 2 BFeb 19, 2021 · N1013A · Boeing 76736NSDR UIEA2021022000364Warning Message · false activationAPU FAULT EICAS (NO FAULT FOUND, APU STARTED PER AMM 49-11-00, START OK.)Feb 19, 2021 · N1489A · Boeing 76731KSDR UIEA2021022200398Igniter · failedAPU NO LIGHT OFF. REMOVED AND REPLACED APU IGNITER PLUG IAW AMM 49-41-02. OPS CHECK GOOD AT THIS TIME.Feb 18, 2021 · N1499A · Boeing 767328SDR UIEA2021021800348Battery · inoperativeAPU WILL NOT START. REMOVED AND REPLACED APU BATTERY REF AMM 24-31-04. OPS CKS GOOD.Feb 17, 2021 · N649GT · Boeing 767375SDR UIEA2021021500316Apu · malfunctionedAPU COLD SOAK START UNSUCCESSFUL AFTER 3 ATTEMPTS FL330 SAT -61 00.15Z RIV-HHN(<P>PERFORMED APU BITE IAW FIM 49-11-FT958. NO MINI FLAGS LRU NO LIGHT SUMMARY. NO DATA RESET. CLEARED, OPS CHECKED NORMAL ON GRD IAW MM 49-11-00.<BR /></P>)Feb 12, 2021 · N649GT · Boeing 767375SDR I5PA2021021168801Starter · wornDISCREPANCY - APU WON'T START CORRECTIVE ACTION - REMOVED AND REPLACED APU STARTER MOTOR IAW AMM 49-41-01. OPS CHECK AND LEAK CHECK OK.Feb 11, 2021 · N688SL · Boeing 757230SDR UIEA2021020800242Apu · malfunctionedAPU FAULT. 3 START ATTEMPTS(<P>PERFORMED FIM TASK 49-11 FAULT TREE 988. APU START SATISFACTORY ON 1ST ATTEMPT. NO FURTHER DEFECTS<BR /></P>)Feb 6, 2021 · N1499A · Boeing 767328SDR ASAA2021020334012Generator · inoperativeTWO ATTEMPTS TO START APU RESULTED IN TWO APU FAULTS, NO START. GROUNDED - YES. R & R STARTER-GENERATOR IAW B737-900 AMM 49-41-21 REF B737-900 FIM 49-40 TASK 803. APU OPS AND LEAK CHECKED GOOD. STARTER-GENERATOR PART NUMBER VERIFIED. REF DEFECT 60035943 FFeb 3, 2021 · N431AS · Boeing 737990ERSDR UIEA2021020300213Door Actuator · stuckPRIOR TO MOVING A/C FROM REMOTE PARKING, APU WOULD NOT START. CYCLED APU INLET DOOR ACTUATOR MANUALLY IAW B767 DDG 49-15-01 M PROCEDURE. APU START SUCCESSFULLY IAW B767 AMM 49-11-00.Feb 2, 2021 · N1511A · Boeing 767383SDR UIEA2021020200189Apu · failedAFTER LANDING APU WOULD NOT START, 3 ATTEMPTS. STARTING PROCEDURE REF AMM 49-11-00-802-002. OPERATION NORMAL. NO APU BITE MESSAGE ON EICAS.Feb 1, 2021 · N1511A · Boeing 767383SDR UIEA2021020200191Circuit Breaker · poppedAPU FAILED TO START UPON ARRIVAL, 3 ATTEMPTS. DOOR ACTUATOR CB FOUND POPPED, CB RESET IAW AMM 20-60-01. OPS CHK SATISFACTORY. APU START FIRST ATTEMPT.Feb 1, 2021 · N641GT · Boeing 76738ESDR UIEA2021012900147Apu · inoperativeAPU WILL NOT START. APU OPS CHECK GOOD IAW AMM 49-11-00-402-002.Jan 29, 2021 · N1511A · Boeing 767383SDR ASAA2021012833977Converter · faultedAPU CSS FAILED 1ST ATTEMPT FL 400 WITH LOW OIL PRESS LIGHT THAT EXTINGUISHED, 2ND ATTEMPT FL 400 WITH FAULT LIGHT THAT EXTINGUISHED, 3RD ATTEMPT FL 320 WITH FAULT LIGHT THAT EXTINGUISHED. GROUNDED - YES. WHEN THE APU IS ON THE GROUND NON COLD SOAKED IT STARTS Jan 28, 2021 · N431AS · Boeing 737990ERSDR ASAA2021012633954Fault Message · unknownFAULT LIGHT ILLUMINATED DURING APU START TWICE AT FL360. SUCCESSFUL CSS ACCOMPLISHED AFTER FAULT LIGHT EXTINGUISHED AT FL310. GROUNDED-YES. PERFORMED B737-800 FIM 49-30 TASK 803, OVERTEMP SHUTDOWN, APU BITE TEST FAULT HISTORY MAINT MESSAGE, CDU SHOWS 49-310Jan 26, 2021 · N508AS · Boeing 737890SDR UIEA2021012400109Charger · inoperativeAPU WILL NOT START (AT START, FAULT FLASH ONCE, RUN FLASH TWICE) NO VOLTAGE DROP OR STARTER ENGAGEMENT. TRANSFERRED TO MDDR 141330, IAW MEL 49-11-01A, CAT C. TS PER FIM 49-11 FT 959. DURING TS NOTICED LOW APU BAT VOTAGE. REMOVED AND REPLACED APU BATTERY, IJan 23, 2021 · N1511A · Boeing 767383SDR ASAA2021011833901Exciter · inoperative2 ATTEMPTS AT STARTING APU RESULTED IN THE FAULT LIGHT ILLUMINATING BOTH TIMES. GROUNDED-YES. FOUND APU TO HAVE NO IGNITION. REPLACED IGNITION UNIT, IAW B737-800 AMM TASK 49-41-31-000-801 AND 49-41-31-400-801. REPLACED IGNITER PLUG LEAD, IAW AMM TASK 49-41Jan 18, 2021 · N533AS · Boeing 737890
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