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 IXXA20261016100Starter · faultedAFTER ARRIVAL CREW REPORTED MELTING PLASTIC ODOR/SMOKE COMING FROM FLIGHT DECK CIRCUIT BREAKER PANEL AREA AND VENTS. SAME SMELL/SMOKE OBSERVED BY FIRE FIGHTERS AND CREW IN AIRCRAFT FOOTPRINT DOWNWIND OF APU VENT AND REAR BULK COMPARTMENT. HAD TO LEAVE FLIGHT DSDR JR2R20260921477Block · debondedRT APU IGNITOR CABLE BLOCK DISBONDED. REPAIREDSDR SIMA20260814001Controller · faultedAPU FAILED TWICE IN FLIGHT. FIRST RESTART WAS SUCCESSFUL, RAN FOR ABOUT 15 MINUTES. FAILED AGAIN. WITH IDG 2 OUT, DIVERTED TO CVG. EMERGENCY DECLARED, T/S IAW FIM 49-10-00-810-810-A. R & R ELECTRONIC STARTER CONTROLLER IAW ERJ 170 AMM 49-42-01. OPS CHECK GOOD.SDR YENA2026081700685Starter · leakingFLT # 234, BOS-MCO. OIL SMELL FORM 15000FT TO THE GROUND DID ISOLATION CHECKLIST WAITED 3 MIN TURNED ON AND ODOR WAS AT THE SAME LEVEL 2; COMPLIED WITH INFO NOTICE 2017-T015M. ITEM DEFERED PER MEL 49-10-01. M PROCEDURE C/W C/B L41 AND L42 PULLED AND COLLAR. R SDR I5PA2026081119304Ecu · faultyAPU FAILED TO START TWICE AFTER LANDING. REPLACED APU ECU IAW APPLICABLE AMM.SDR DALA2026072104275Exciter · faultedDIVERSION, DISPATCHED WITH RT IDG ON MEL, APU AUTO SHUTDOWN IN CRUISE AT FL330. RESTART ATTEMPTS NO HELP. DIVERTED TO JAX. REPLACED ECU. NO HELP. REPLACED EXCITER, LEAD AND IGNITER PLUG. CHECKS OK. REPLACED #2 ENGINE IDG. (LP 8739534 - AIRCRAFT WAS GROUNDED)SDR I5PA2026062275706Pressure Switch · faultedFLIGHT MGE301, APU INFLIGHT START FAILED. FOUND APU DIFF PRESSURE SWITCH FAULTY. R & R DIFFERENTIAL PRESSURE SWITCH IAW AMM. OPS CHECK NORMAL, APU VERIFICATION FLIGHT SUCCESSFUL.SDR SWAA2026061511911Starter Gen · failedDURING PUSH, AFTER ENGINE START, AUDIBLE POP, POWER LOSS, & SMOKE ODOR IN COCKPIT & AFT GALLEY. CREW REPORTED ACFT WAS STILL ON APU GEN AT THE TIME OF POWER LOSS. INSPECTED APU GENERATOR AND FOUND DAMAGE & MELTED PLASTIC AT TERMINAL BOX. R & R APU STARTER SDR DALA2026042902734Ecu · failedAPU AUTO SHUTDOWN PROCESS BEGAN. RAN THE QRH WITH NO FIRE VISIBLE. APU WAS SHUT DOWN. THERE WAS AN ELECTRICAL SMELL IN THE AFT CABIN. R/R APU ECU REF B717 AMM 49-61 (8304376) (AIRCRAFT GROUNDED)SDR DALA2026040502160Starter · odorDURING TAXI IN, AFTER TURNING ON APU BLEED AIR, WE NOTICED A STRONG ELECTRICAL BURNING ODOR. TURNED APU BLEED OFF & ODOR DISSIPATED. REPLACED APU STARTER IAW AMM 49-42. OPS CHECK GOOD. (LP 8560146)SDR U5QA202603180168Apu · faultedAPU FAILED TO START ON PAST 2 APPROACHES. CYAN APU SHUTDOWN CAS POSTED. ON SUBSEQUENT ATTEMPT AFTER LANDING THERE WAS A VERY STRONG SMELL OF FUEL IN THE CABIN. MX C/A: INSPECTED APU INLET AND APU IGNITER, APU INLET WAS CLEAR AND APU IGNITER WAS WITHIN LIMITS SDR I5PA2026020888801Brushes · wornAPU INOPERATIVE. FOUND APU STARTER BRUSHES WORN. R & R APU STARTER IAW AMM, OPS CHECKED NORMAL.SDR I5PA2026012768802Starter · faultyAPU FAULT. R & R APU STARTER IAW AMM 49-41-01. OPS CHECKED NORMAL.SDR AALA202601293423Starter · burned outAIRCRAFT WAS GROUNDED: FLIGHT DECK AND CABIN CREW NOTICED A VERY POTENT SMELL THROUGHOUT AIRCRAFT. NOTICED IT BELOW 10K FEET ON DESCENT AND REMAINED UNTIL SHUTDOWN AT GATE. WHAT COULD BE DESCRIBED AS "BURNING PLASTIC" SMELL. **SUPPLEMENTAL REPORT FOR (AALA2026SDR I5PA2025101375702Ecu · faultyAPU PNEUMATICS INOPERATIVE. R & R APU ECU PER AMM. OPS CHECKED NORMAL.SDR CALA2025092909368Contactor · missingAPU CRANK CONTACTOR U/S ON FIT. APU CRANK CONTACTOR FOUND TO BE MISSING END STOP CAUSING CONTACTS TO BE MADE, NOTICED AFTER UNCOMMANDED APU START ON APU BATTERY CONNECTION. DEFECTIVE ON FIT APU CONTACTOR REPLACED AS PER AMM TASK 49-41-05-404-005. APU CRANK CSDR HALA20250918281Exciter · faultedETOPS - APU AUTO SHUTDOWN ON TAXI IN. REMOVED AND REPLACED EXCITER - IGNITION BOX PER AMM 49-41-00. OPS CHECK GOOD. OK TO CONTINUE.SDR YENA2025090900921Igniter · faultedFLT#1621, LHR-BOS. (ETOPS), APU AUTO SHUTDOWN ON TAXI IN; REPLACED THE IGNITER PLUG IAW AMM 49-41-41. OPS TEST WAS PERFORMED IAW AMM 49-00-00.A/C IS OK FOR SVC.SDR I5PA2025082219301Starter · failedAPU STARTER FAILED. R & R APU STARTER PER AMM.SDR HALA20250814247Blanket · damagedETOPS - FOUND APU SURGE AIR DUCT THERMAL BLANKET DAMAGED. REMOVED AND REPLACED APU SURGE AIR DUCT THERMAL BLANKET IAW A330 AMM 49-41-52-420-050-A STEP 9K.SDR NACA2025071600001Apu · faultedAPU WILL NOT START, AUTO ABORTS AT 45%SDR DALA2025072405565Starter Gen · failed(LOG 7394804) AT GATE APU GEN DROPPED OFFLINE ACCOMPANIED WITH AN ACRID ODOR/ BURNING SMELL IN COCKPIT + CABIN. REPLACED APU STARTER GEN REF B737 AMM 49-41.SDR YENA2025072300753Apu · malfunctionedFLT#834, SFO-BOS. (ETOPS) APU FAILED TO START IAW A49-00-01A 2 START ATTEMPS MADE OAT- 44 FL350; REMOVED AND REPLACED APU IGNITION EXCITER REF AMM 49-41-38 OPS CHECK GOOD.SDR DALA2025072405576Ecu · faultedSHIP 5650 - ATO - REJECTED TAKEOFF BELOW 80 KTS DUE TO APU FAULT DURING NO BLEED TAKEOFF. CORRECTIVE ACTION: APU PLACED ON MEL FOR DC POWER LOSS FAULT. PERFORMED HIGH ENERGY STOP INSPECTION. NO DEFECTS FOUND. LATER, REPLACED APU ECU AND APU BATTERY BUS CIRCUITSDR HALA20250721226Insert · damagedETOPS - APU FAULT UPON APU START. REMOVED AND REPLACED ECB AND CONDITION SAME. RE-INSTALLED THE ORIGINAL ECB PER AMM 49-71-04. REMOVED/REPLACED IGV ACTUATOR PER AMM 49-23-51. UPON REPLACEMENT OF IGV ACTUATOR, FOUND PNEUMATIC LINE TO THE TOTAL PRESSURE PROBE LOSDR HALA20250721224Pin · out of limitsETOPS - APU AUTOSHUTDOWN ON TAXI INTO GATE. FOUND STARTER WEAR PIN BEYOND LIMITS. REMOVED AND REPLACED STARTER PER AMM 49-42-51. OPS CHECK GOOD. OK FOR SVC.SDR DALA2025071405271Starter Gen · inoperative(LOG 7444640) FUMES AND SMOKE DETECTED. A/C WAS ON APU PWR/AIR AND APU PWR DROPPED AS SMOKE WAS DETECTED. REMOVED AND REPLACED APU STARTER GENERATOR PER B737 AMM 49-41. OPS CHECK GOOD. REMOVED AND REPLACED RE-CIRC FILTERS.SDR I5PA2025070429301Exciter · faultedFLT NO: MGE 402, APU FAULT ON THE GROUND, UNABLE TO START APU. PERFORMED ECU BITE TEST, MINI FLAGS 28 AND 91. ISOLATED ISSUE TO APU EXCITER. MX R/R APU EXCITER, OPS CHECK.SDR I5PA2025062768806Igniter · faultedFLT: MGE 300, ESI. APU FAULT ON TAXI IN. TROUBLESHOT PER FIM 49-11 FT 852. R & R APU IGN PLUG. OPS CHK OK.SDR I5PA2025062768805Exciter · faultyFLT: MGE 300, ESI. APU FAULT ON TAXI IN. TROUBLESHOT PER FIM 49-11 FT 852. R/R APU IGN EXCITER. OPS CHK OK.SDR NACA2025062400001Starter · failedAPU WILL NOT START. REMOVED AND REPLACED APU STARTER IAW AMM 49-41-01 OPS CHECK NORMAL.SDR NACA2025072800001Apu · hung startTROUBLESHOOT APU HUNG START AT 51% N1. REMOVED AND REPLACED APU IAW AMM 49-11-01-404-085SDR HALA20250609171Exciter · faultedETOPS - ON START UP ECAM APU FAULT AUTO SHUTDOWN. REPLACED FLOW DIVIDER ASSY PER AMM 49-31-51. CONDITION SAME. REMOVED AND REPLACED EXCITER BOX QND IGNITOR PLUGS PER AMM 49-41-38 AND 49-41-41. OPS CHECK GOOD. NO FAULTS FOUND. OK FOR SVC.SDR HALA20250609168Starter · faultedETOPS - APU AUTOSHUTDOWN 3 TIMES. REMOVED AND REPLACED STARTER ON APU PER AMM 49-42-51. REPLACED CLUTCH PER AMM 49-42-51. REPAIRED DAMAGED WIRE PER E105 -C30086-INI OPS CHECK GOOD OK TO CONTINUESDR HALA20250602160Igniter · faultedETOPS - APU FAULT ON TAXI INTO GATE. APU AUTO SHUTDOWN. BITE TEST SHOWS CLASS 2 IGN PLUG/ IGN EXCITER MESSAGE, REMOVE AND REPLACE BOTH APU IGN PLUG PER AMM 49-41-41/201 & OPS CHECK GOOD, CYCLED 4 TIMES WITH NO DEFECTS NOTED, BITE TEST OK, NO MESSAGES DISPLAYEDSDR HALA20250602157Igniter · faultedETOPS - APU AUTO SHUT DOWN TWICE CALLED MX, SHUT DOWN THRID TIME ALSO NOTICED FUEL SLOWLY DRIPPING FROM APU DRAIN MAST. REMOVED AND REPLACD APU IGNTIER PLUG PER AMM 49-41-41 AND APU IGNITION UNIT PER AMM 49-41-38. OPS AND LEAK CHK GOOD. OK FOR SVCSDR HALA20250527151Igniter · faultedETOPS - APU AUTO SHUTDOWN. REMOVED AND REPLACED APU IGNITER PLUG PER AMM 49-41-41. REMOVED AND REPLACED IGNITION UNIT PER AMM 49-41-38. OP'S CHECK GOOD. NO DEFECTS NOTED. OK FOR SERVICE.SDR YENA2025052700534Igniter · failedFLT#1908, CDG-JFK. (ETOPS) 'ON START AFTER LANDING APU AUTO SHUTDOWN. HUNG AT 20%. NO EGT INCREASE; REMOVED AND REPLACED APU IGNITER PLUG W/REF TO AMM 49-41-41. PERFORMED OPS CHECK OF APU, NO FAULT NOTED. A/C OK FOR SVC.'SDR CALA2025052604938Starter · faultedAPU FAULT NO START APU WILL NOT START. WHILE INSPECTING APU FOUND BLOWN BOOT LT SIDE OF APU FROM SURGE VALE. FOUND APU COLD SOAKED, STARTER EXTREMELY HOT TO TOUCH. STRONG ODOR POSSIBLE STARTER ISSUE. *DM* REFERENCE FIM 49-11 FAULT TREE 875 AND DOCUMENT RESULTSDR HALA20250520143Exciter · faultedETOPS - APU START FAILED 3 TIMES WHEN ATTEMPTING TO START AFTER LANDING. ECAM VERIFIED AUTO SHUTDOWN EACH TIME. FOLLOWED TSM 49-00-81-810-825,REMOVED AND REPLACED IGNITION EXCITER PER AMM 49-41-38 AND REMOVED & REPLACED IGNITER PLUG PER AMM 49-41-41. OPS CHECKSDR HALA20250519139Shaft · shearedETOPS - APU FAULT. FOUND STARTER SHAFT SHEARED. REMOVED AND REPLACED STATER PER AMM 49-42-51. REPLACED STARTER CLUTCH MODULE AS PRECAUTIONARY PER AMM 49-42-41. OPS AND LEAK CHECK GOOD.SDR HALA20250507128Ecb · failedETOPS - APU FAILED TO START. REMOVED AND REPLACED APU ECB PER AMM 49-61-34. OPS CHECK GOOD, NO DEFECTS NOTED. OK FOR SERVICE.SDR HALA20250505122Igniter · faultedETOPS - APU FAULT. APU AUTO SHUTDOWN. REMOVED AND REPLACED FCU PER AMM 49-32-51. CONDITION SAME. REMOVED AND REPLACED IGNITER PLUGS A AND B REF AMM 49-41-41. REMOVED AND REPLACED APU IGNITION EXCITER REF AMM 49-41-38. OPS CHK GOOD. OK FOR SVC.SDR HALA20240421109Igniter · faultedETOPS-APU AUTO SHUTDOWN X2. REPLACED IGNITION UNIT & IGNITER PLUG PER AMM 49-41-38/ AMM 49-41-41. APU ECB TEST GOOD + OPS TEST GOOD. OK FOR SVC.SDR HALA20250416108Igniter · failedETOPS-BTB: APU FAIL. REPLACED APU IGNITOR PLUG AND LEAD REF AMM 49-41-41 AND 49-41-43, OPS TEST NORMAL. OK FOR SVC.SDR HALA20250404099Fuse · inoperativeETOPS - APU AUTO SHUTDOWN (2-ATTEMPTS). FOUND FUSE FIN 6KA1 INOP-REMOVED AND REPLACED FUSE PER AMM 49-42-00 AND ACCOMPLISHED PRECAUTIONARY STARTER CHANGE DUE TO PREVIOUS SHUTDOWNS PER AMM 49-42-51. OPS CHECK GOOD.SDR NACA2025022300001Igniter · failedAPU FAULT ON APPROACH AND ON GROUND. REMOVED AND REPLACED THE IGNITER PLUG IAW AMM 49-41-02, REMOVED AND REPLACED THE IGNITION LEAD IAW AMM 49-41-04 AND REMOVED AND REPLACED THE IGNITION UNIT IAW AMM 49-41-03.SDR CALA2025020702230Apu · faultedMAINT LIGHT ILL AS SOON AS MCD CLOSEDSTATUS PAGE SHOWS APU GEN FAULT MSG 49-41244 REQ TO MEL 4911A DISPATCH DESK: 93 NAME: NL DATE: 03-FEB-25- NOC DESK: 737 NAME: MM DATE: 03-FEB-25- MEL 4911A APPROVED. UPON CLEARING THIS MEL ITEM, CONTACT TOMC FOR SDR NACA2025012300001Ignition Lead · failedAPU FAULT ON STARTUP. REPLACED APU IGNITION LEAD PER AMM 49-41-04, APU STARTED OPS CHECK GOOD.SDR HALA20250121027Motor · faultyETOPS - APU WILL NOT START. REMOVED AND REPLACED APU STARTER MOTOR I.A.W. AMM 49-42-51-400-801-A. NO DEFECTS NOTED AT THIS TIME. A/C OK TO CONTINUE.
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