JASC 4920
Service difficulty reports · 2,432
Reports filed under 4920 · APU Core Engine, 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 = '4920' 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 = '4920' 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 DLM88980149Apu · failedDURING CLIMBOUT, CABIN FILLED WITH BLUE SMOKE. RETURNED TO ATL. BOTH PACKS ON AND SMOKE DET CAPTS SIDE AFT WENT OFF. FOUND APU LEAKING OIL. REPLACED APU.SDR CALA9800046Turbine · failedTHE APU WAS STARTED AFTER LANDING IN EWR AND RAN NORMALLY FOR A WHILE AND THEN FLAMED OUT. THE APU WOULD NOT RESTART. MAINTENANCE FOUND AN UNCONTAINED TURBINE WHEEL SEPARATION. THE SHROUD DID NOT CONTAIN THE TURBINE WHEEL WHICH CAUSED DAMAGE TO THE APU FIREWSDR 9723111141Apu · smokingDURING TAXI AS PACKS NR 2 AND NR 3 WERE BROUGHT ON LINE, SMOKE BEGAN TO ENTER THE CABIN AREA. AIRCRAFT RETURNED TO THE GATE AND PASSENGERS DEPLANED THROUGH THE JETWAY. MAINTENANCE FOUND OIL CONTAMINATION FROM THE APU WAS THE SOUCE OF SMOKE. PACK/DUCTING BURSDR AALA972377Apu · malfunctionedLGA - FLT 0313 - AFTER TAKEOFF LGA, FLIGHT ATTENDANT NOTED A STRONG OIL SMELL AND SMOKE IN CABIN. ACCOMPLISHED ABNORMAL PROCEDURES AND AIRCRAFT RETURNED LGA AND LANDED WITHOUT INCIDENT. REPLACED APU, COALESCER BAGS, AND BURNED PACKS OFF AFTER CHANGE. AIRCRASDR USAAD97230Apu · smokingCMH - FL 818 - AFTER T/O THE CREW NOTICED THE SMELL OF BURNED OIL IN THE COCKPIT. THE FLT ATTENDANTS NOTICED SMOKE IN THE CABIN AND BOTH LAVATORY SMOKE DETECTORS WENT OFF. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MX INSPECTED BOTH LEFSDR AALA972295Apu · malfunctionedMEX - FLT 1651 - AFTER TAKEOFF MEX DURING CLIMB-OUT, SLIGHT SMOKE NOTED IN CABIN. AIRCRAFT RETURNED TO MEX AND LANDED OVERWEIGHT WITHOUT INCIDENT. REPLACED APU AND ALSO ACCOMPLISHED PACK BURNOUT PROCEDURE AND REPLACED ALL COALESCER BAGS. ACCOMPLISHED OVERWESDR 97UAL900855Turbine · deterioratedWITH APU RUNNING RIGHT GEAR WELL FILLS WITH SMOKE. WHEN APU LOADED WITH PACKS CABIN HAS BURNING SMELL. *S/D* FOUND EXTENSIVE WEAR OUT, 1ST STAGE DIFFUSER CORRODED, ERODED AND COKED. EROSION ON TURBINE WHEEL, SHROUD, NOZZLES AND NOZZLE SUPPORT. TURBINE WHESDR DLM88972368Apu · failedAFTER T/O PASSING 3000 FT, CABIN FILLED WITH SMOKE. FOUND APU OIL LEAKING, CAUSING CONTAMINATION. CONDUCTED BURN-OUT PROCEDURES. REPLACED WATER SEPARATOR BAGS. ACCOMPLISHED RUN-UP, NO SMOKE. REPLACED WATER SEPARATOR BAGS SECOND TIME AND PER SDR 97UAL900830Bearing · failedON TAXI-IN WITH APU RUNNING CABIN FILLED WITH SMOKE. *S/D* APU FRONT BEARING FAILURE. RELACED APU.SDR CA971110015Actuator · intermittent(CAN) ON TAKEOFF, AUXILIARY POWER UNIT SHUT DOWN. AIRCRAFT RETURNED. OVERWEIGHT LANDING. AUXILIARY POWER UNIT INLET GUIDE VANE ACTUATOR REPLACED.SDR SWIA971000Apu Comp Seal · leakingSMOKE IN CABIN DURING TAXI OUT. TAXIED BACK TO THE GATE. GROUND RAN ALL, CHECKED LEFT TO RIGHT ENGINE BLEEDS AT DIFFERENT POWER SETTINGS. NO SMOKE NOTED DURING ENGINE RUN. WHEN APU WAS SHUT DOWN THE CABIN AND COCKPIT FILLED UP WITH SMOKE. SUSPECT APU COMPSDR QXEA9700583Apu · failedGEG- WHILE THE AIRCRAFT WAS ON THE GROUND, THE APU STARTED SMOKING OUT OF THE EXHAUST AND THROUGH THE BLEED SYSTEM IN THE CABIN. APU WAS SHUT DOWN, PLACED APU ON MEL, REFERENCE 49-1. COMPLIED WITH BLEED AIR SYSTEM BLOW-OUT MAINTENANCE TASK CARD NR 8301001. SDR MWEA97787Apu · smokingAT GATE, CABIN FILLED WITH SMOKE. MTC DEPLANED THRU PAX, RAN ENG FOR 1 HR CLEARED AIR DUCTING OF OIL SMELL, BORESCOPED THE APU AND LEAK CHECKED. NO DEFECTS NOTED APU PUT ON ALERT 2498 TO MONITOR OIL HEAT.SDR MWEA97777Apu · failureWHILE SITTING AT GATE, CABIN FILLED WITH SMOKE. MTC DEPLANED THROUGH PASSENGERS RAN ENGINE FOR ONE HOUR TO CLEAR AIR DUCTING OF OIL SMELL AND DEFERRED APU PER MEL 49-01A.SDR 97UAL900702Compressor Vane · brokenAPU AUTO SHUTDOWN AT DEPARTURE TIME. *S/D* FOUND APU DRIVEN COMPRESSOR DEWHISTLER VANE BROKEN. IMPELLER FOD. APU REPLACED.SDR 97UAL900684Diffuser · bad repairAPU DROPS OFF LINE AT ENGINE START. ALSO, APU WILL NOT HOLD ELECTRICAL POWER. *S/D* AFTER REMOVING CHRONIC APU, FOUND DRIVEN COMPRESSOR DIFFUSER WITH VERY CRUDE REPAIR TO LEADING EDGES OF THE VANES. ALSO, IGV VANES WERE VERY STIFF. CHRONIC APU REPLACED PESDR USAASB97240Aux Power Unit · failedCLT (FL 1284) FLIGHT DEPARTED CLT WITH NR 1 CSD ON MEL. APPROXIMATELY 30 MINUTES OUT CLT, THE APU OVERSPED AND SHUT DOWN. THE AIRCRAFT DIVERTED INTO RIC DUE TO ONE ELECTRICAL SYSTEM ON LINE. AN EMERGENCY WAS DECLARED,THE AIRCRAFT LANDED WITHOUT FURTHER INCISDR CA970915002Apu · seized(CAN) WHILE TAXING, APU WAS STARTED AND RAN FOR APPROXIMATELY 15 MINUTES THEN AUTO SHUT DOWN. APU FAULT PANEL INDICATED APU ENGINE LOW OIL PRESSURE. OIL FILTER CONTAMINATED. TURBINE WHEEL VERY HARD TO ROTATE. APU REPLACED.SDR 97UAL900666Diffuser · misrepairedAPU PRESSURE GOES TO ZERO ON ENGINE START AND GENERATOR GOES OFF-LINE. APU PNUEMATIC AND ELECTRICAL INOP. APU INOP. *S/D* AFTER REMOVING CHRONIC APU, FOUND DRIVEN COMPRESSOR DIFFUSER WITH VERY CRUDE REPAIR TO LEADING EDGES OF THE VANES. ALSO, IGV VANES WESDR CA970904006Bearing · failed(CAN) LOUD BANG WAS HEARD FROM THE APU AND AUTO SHUTDOWN OCCURRED. BORESCOPE REVEALED METAL PARTICLES IN THE COMBUSTION CAN. THE FORWARD FAN BEARING IS SUSPECT. APU REPLACED AND SENT TO MANUFACTURER FOR REPAIR.SDR 97ZZZM953Turbine Blade · brokenON SHORT FINAL OMA, APU FIRE WARNING RED LIGHT AND MASTER FIRE WARNING LIGHT ON. APU SHUTDOWN AND APU FIRE SWITCH PULLED AND ROTATED. BOTTLE DISCHARGED NORMALLY. APU FIRE CHECKLIST COMPLETED (M23206). ACCESS APU AREA, OPEN COWL, PULL APU SHROUD AND NOTED NSDR 9716621151Apu · failedAFTER TAKEOFF, CABIN BEGAN TO FILL WITH SMOKE. CREW ISOLATED PACKS AND FOLLOWED SMOKE REMOVAL CHECK LIST. SMOKE CLEARED AND FLIGHT CONTINUED TO DESTINATION. MAINTENANCE PURGED THE PNEUMATIC SYSTEM AND REPLACED THE APU.SDR CALA9701238Combustor Unit · inoperativeTHE APU FIRE LIGHT AND BELL ACTIVATED AS APU WAS BEING STARTED ON LANDING. THE APU FIRE CHECKLIST WAS COMPLETED, THE APU FIRE BOTTLE WAS DISCHARGED AND THE APU WAS SHUT DOWN. MAINTENANCE FOUND THE APU HAD TORCHED. THE APU COMBUSTOR UNIT WAS REMOVED AND REPLSDR HALA9700145Apu · odorHNL - FLT 25 - LOG PAGE 3928369. AFTER LANDING, APU SLOW TO START AND F/A REPORTED SMOKE SMELL IN CABIN. INSPECTED RECIRCULATION FANS FOR CONDITION AND SECURITY. CHECKED ALL SIDE WALL AND CEILING VENTS. SUSPECT APU EXHAUST ENTERING IN CABIN AFTER LANDING. SDR 97UAL900569Turbine · failedAPU FAILURE WHILE AT START UP SPEED PRIOR TO DISPATCH. APU GEARBOX ACCESSORY UNIT SEPARATED FROM THE COMPRESSOR ON THE BOTTOM SIDE. COMBUSTION SECTION HAS A HOLE ON THE BOTTOM SIDE. *S/D* THE APU EXPERIENCED OVERSPEED AND SHUTDOWN AT START-UP. UPON RECEIPSDR DL757971380Apu · failedSMOKE IN COCKPIT/FOUND APU PUTTING OIL INTO DUCT. REPLACED APU.SDR 97UAL900527O-Ring · cutPUNGENT ODOR/SMOKE IN AIRCRAFT ON ENGINE PNEUMATICS AT HIGH ENGINE POWER. *S/D* FOUND APU SPEED SENSOR (MONOPOLE) O-RING CUT AND OIL LEAKING INTO THE COMPRESSOR AREA. REPLACED O-RINGS AND BURNED OUT PACKS. CHECKED OUT OK.SDR USAAF97057Aux Power Unit · failedPIT/ERI - FLT 502 - ON DESCENT INTO ERI, THE APU SHUT DOWN AUTOMATICALLY WHEN THE SPEED BRAKE WAS DEPLOYED. A 'LOW AGENT' FOR THE APU FIRE SYSTEM ALSO ILLUMINATED. THE FLIGHT LANDED ERI WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE APU ASSY. US AIRWAYSDR USAAF97053Apu · failedCLT/TRI - FLT 873 - AFTER TAKEOFF FROM CLT, THE CREW NOTICED A SMOKE SMELL IN BOTH THE COCKPIT AND THE CABIN. THE SMOKE DETECTOR IN THE AFT LAVATORY ACTIVATED. THE FLIGHT RETURNED TO CLT WITHOUT FURTHER INCIDENT. MAINTENANCE DETERMINED THE SMOKE WAS DUE TOSDR CALA9700981Apu · failedTHE APU FIRE DETECTION LOOP LIGHT ILLUMINATED AFTER TAKEOFF. THE FIRE BOTTLE WAS DISCHARGED AND THE LIGHT EXTINGUISHED. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. THE APU COMPARTMENT WAS INSPECTED AND THERE WAS NO EVIDENCE OF FIRE FOSDR QXEA9700216Apu · malfunctionON THE GROUND SMOKE SMELL NOTED IN THE CABIN. VISUALLY IDENTIFIED AS BLUE SMOKE. DETERMINED THE OIL SMOKE/SMELL TO BE FROM THE AUXILIARY POWER UNIT. COMPLIED WITH MAINTENANCE TASK CARD 8301001, TO PURGE SMOKE FROM CABIN. NO MORE SMOKE OR SMELL NOTED. PLACSDR CALA9700737Apu · malfunctionedSMOKE ENTERED THE COCKPIT AND CABIN AFTER TAKEOFF. THE LEFT PACK WAS TURNED OFF AND THE SMOKE DISSIPATED. THE FLIGHT WAS CONTINUED TO FLL WHERE IT LANDED WITHOUT FURTHER PROBLEM. MAINTENANCE VERIFIED THAT WHEN EITHER PACK WAS RUN WITH APU AIR SMOKE WAS CREASDR QXEA9700176Apu · malfunctionAIRCRAFT HAS SMOKE IN CABIN. INSPECTED AND DETERMINED TO BE FROM AUXILIARY POWER UNIT. COMPLIED WITH BLEED AIR BLOW OUT AND PLACED APU ON MEL. AIRCRAFT RETURNED TO SERVICE. MEL CLEARED ON 5/10/97 BY REPLACING APU, OPERATIONAL CHECK GOOD.SDR 97ZZZX2971Apu · failedFLIGHT CREW REPORTED APU INOPERABLE. APU PLACED ON MEL 49-1. UPON INVESTIGATION, MX DISCOVERED APU FAILED. APU REMOVED/DEACTIVATED PER MM 49-10-00 ON 4-30-97. DAMAGE NOTED: GEAR CASE HOUSING CRACKED AROUND ENTIRE MOUNTING FLANGE (AT COMPRESSOR PLENUM)SDR 97UAL900346Bearing · failedEXCESSIVE AMOUNT OF SMOKE CAME FROM APU TAIL PIPE. SUPPLEMENTAL DATA UPDATE, FOUND TURBINE ROLLER BEARING FAILED. LOSS OF OIL AND LOW OIL PRESSURE DUE TO BEARING FAILED RESULTED IN FLASH COMBUSTION AND HEAVY SMOKE. REPLACED THE BEARING.SDR AU970421Turbine · failed(AUS) APU FAILED - DEBRIS EXITING FROM EXHAUST - INVESTIGATION FOUNDTHAT THE TURBINE WHEEL AND SHAFT ASSEMBLY FAILED AND HUB SEPARATED DUE TO `HAFNIUM INCLUSION'SDR 97UAL900279Apu Engine · will not startAPU WILL NOT START.SDR QXEA9700091Apu · smokingPDX - FLIGHT CREW NOTED SMOKE COMING FROM AIR CONDITIONING VENTS. AIRCRAFT WAS AT THE GATE FOR 45 MINUTES WITH NO PROBLEM, THEN WHEN BOARDING, FLIGHT CREW NOTICED SMOKE BEGAN SLOWLY (COCKPIT OFF CABIN ON). APU REPLACED I/A/W MAINTENANCE MANUAL AND APU OPS CHSDR AU970186Turbine · damaged(AUS) APU TURBINE BUCKLED AND WHEEL PROTRUDED THROUGH ENGINE CASING - DAMAGE TO GEARBOX AREA - RH ENGINE MOUNT SHATTEREDSDR MWEA97119Oil System · blow byCREW REPORTS, SMOKEY SMELL IN CABIN. MAINT RAN APU AND CYCLE MACHS, NO SMELL NOTED. SUSPECT OIL BLOW FROM APU.SDR AU970213Aux Power Unit · faulty(AUS) APU LEAKING OIL INTO EXHAUST SYSTEM AND AIRCONDITIONING DUCT -SUSPECT INTERNAL SEAL LEAK - THIS DEFECT WAS RECEIVED FROM NO34 SQUADRON RAAF AND IS FOR INFORMATION ONLYSDR 9702791158Apu · failedDURING BOARDING, THE APU FAILED, FIRE BOTTLES WERE FIRED AND CABIN FILLED WITH SMOKE. REPLACED APU, WATER SEPARATOR BAGS AND PURGED PACKS.SDR AALA970310Apu · bypassing oilORD - FLT 390 - AFTER TAKEOFF ORD DURING CLIMB-OUT, SMOKE NOTED IN CABIN AND COCKPIT. ACCOMPLISHED ABNORMAL PROCEDURES AND AIRCRAFT RETURNED TO ORD, LANDING WITHOUT INCIDENT. REPLACED APU DUE TO APU BYPASSING OIL. SUBSEQUENTLY, AIRCRAFT DEPARTED ORD AND PROSDR C2XA97CL015Apu · failedCLE - FLT 3076 - CREW REPORTED SMOKE IN CABIN WITH A WARNING ALARM. MAINTENANCE INSPECTED THE AIRCRAFT AND AFTER EXTENSIVE TROUBLESHOOTING THE AUXILIARY POWER UNIT WAS REMOVED AND REPLACED IAW EMB-120 MM 49-00-02. OPERATIONAL AND LEAK CHECKS WERE SATISFACTORSDR 97ZZZX4216Compressor · blade failedPILOTS REPORTED THE APU WAS MAKING A HIGH PITCHED UNUSUAL NOISE. INSPECTION REVEALED A PIECE OF ONE COMPRESSOR BLADE HAD BROKEN AND STRUCK SEVERAL OTHER BLADES. NO OTHER DAMAGE NOTED AT THIS TIME. APU IS BEING SENT TO A REPAIR FACILITY FOR FURTHER EVALUATIOSDR AU970063Compressor · failed(AUS) APU LOAD COMPRESSOR AND GEARBOX SEIZED - LOAD COMPRESSOR PROTRUDING THROUGH OUTER CASINGSDR DLM88970027Apu · oil leakON CLIMBOUT HAD ODOR IN COCKPIT/CABIN WITH LAVATORY SMOKE DETECTOR SOUNDING. FOUND APU CHIP DETECTOR LEAKING OIL AND APU INGESTED OIL AND CONTAMINATED THE AIR CONDITIONING SYS. FWD APU TO MCO AND PLACARD. CHANGED WATER SEPARATOR BAGS, RAN ENGS AND A/C OPS CSDR QXEA9600501Apu · malfunctionedCABIN FILLED WITH SMOKE AFTER DEPARTURE. AIRCRAFT RETURNED TO FIELD AND LANDED WITHOUT FURTHER PROBLEM. PROBLEM TRACED TO OIL IN THE CABIN PACK FROM THE APU. PACK AND APU PLACED ON MEL 21-1 AND 49-1.SDR ASAA9610144Apu · malfunctionedANC - FLT 113 - DURING APU START ATTEMPT, GROUND PERSONNEL REPORTED THAT FLAMES WERE EVIDENT FROM THE APU EXHAUST. CREW DISCONTINUED START ATTEMPT AND DISCHARGED APU FIRE BOTTLE. REPLACD APU AND APU FIRE BOTTLE. ALLIED SIGNAL CONCLUDED THAT THE TURBINE SEALSDR 96UAL900889Turbine Wheel · crackedLOUVER ASSEMBLY AND EXHAUST DUCTS DAMAGED WHEN TURBINE BROKE OFF FROM THE APU. *S/D* UNITED NO LONGER USES (P/N 3606982-1) AND NOW USES(P/N 3842072-2 OR - 3). THE PROBLEM HAS BEEN ADDRESSED AND ALL MEANS OF INSPECTION AND REPAIR OF SADDLE CRACKS ARE IN PLAC
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