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.

SDR DLM88991391Apu · malfunctionedAFTER T/O, AFT LAV SMOKE DETECTORS STARTED SIGNALING WITH SOME HAZE IN THE CABIN. RETURNED TO CVG. PERFORMED DUCT BURNOUT PER M/M CH 36 AND REPLACED WATER BAGS, RAN BOTH ENGS TO T/O AND NO SMOKE/HAZE NOTED. ENGS STARTED WITH EXT AIR APU NOT USED. REPLACED Jun 17, 1999 · N987DL · Doug MD88SDR DLM88991364Turbine · failedAFTER TRANSIT CHECK, THICK SMOKE IN CABIN WITH LT PACK RUNNING. REPLACED APU. CLEANED APU INLET ASSY. REPLACED COALESCER BAGS. PERFORMED DUCT BURNOUT. RAN PACKS, NO SMOKE OR ODORS.Jun 15, 1999 · N961DL · Doug MD88SDR USAABB99030Apu · malfunctionedSFO-PIT - FLT 96 - ABOUT 1 HOUR AFTER TAKEOFF THE APU HAD AN AUTO SHUTDOWN ALONG WITH THE FAULT LIGHT ILLUMINATING AND THE EICAS MESSAGE APU FAULT LIGHT DISPLAYED. DUE TO ONE ENGINE DRIVEN GENERATOR ALREADY ON MEL THE AIRCRAFT RETURNED TO THE FIELD. MAINTENAJun 13, 1999 · N632AU · Boeing 7572B7SDR CA990719027Apu · failed(CAN) OIL SMELL IN COCKPIT AND FORWARD GALLEY AFTER TAKEOFF. APU REPLACED.Jun 13, 1999 · Airbus A320211SDR CALA9900559Combustor · inoperativeTHE APU FIRE INDICATION LIGHT AND BELL ACTIVATED APPROXIMATELY TWO MINUTES AFTER STARTING APU WHILE DESCENDING INTO DFW. THE APU FIRE BOTTLE WAS DISCHARGED AND THE LIGHT AND BELL WENT OUT. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND WIRES BURNT May 14, 1999 · N17620 · Boeing 737524SDR 99UAL900268Seal · failedDIVERTED TO BOI DUE TO LOSS OF APU GENERATOR. THE LEFT GENERATOR WAS LOST ON TAKEOFF. *S/D* APU SHUTDOWN WITH 'APU OIL QTY' MSG. FOUND OIL DRIPPING FROM DRAIN MAST INDICATING A CARBON SEAL DEFECTIVE. GENERATOR COULD NOT STAY ON LINE DUE TO AUTO SHUTDOWN May 9, 1999 · N557UA · Boeing 757222SDR AU990397Apu · fire(AUS) APU FIRE. DAMAGE WAS FOUND AROUND THE EGT THERMOCOUPLE AND WIRING AND EVIDENCE OF DAMAGE IN THE LOWER EXHAUST SHROUD AREA ADJACENT TO THE EGT HARNESS.Apr 30, 1999 · Boeing 737377SDR CA990423016Apu · failed(CAN) AFTER APU START AND BLEEDS TRANSFERRED TO APU, THE RPM DROPPED AND EGT VENT WENT HIGH WITH NO WARINING IN THE COCKPIT. APU SHUTDOWN MANUALLY. APU STARTED AGAIN ON GROUND, EGT WENT TO 580 DEGREES CELSIUS AT 50 PERCENT RPM, FOLLOWED BY A 2 METER LONG FIApr 22, 1999 · Cndair CL6002B19SDR 99UAL900224Seal · failedOUTBOUND CREW SMELLED OIL IN COCKPIT. PREVIOUS REPORT OF SMOKE AND SMELL IN CABIN AND COCKPIT ON FLIGHT 918-12. *S/D* APU (S/N 1059) (P/N 3800550-1) WAS REMOVED FROM A/C 2069 ON 4/23/99. APU HAD SUFFERED SEVERE ENGINE COMPRESSOR DAMAGE DUE TO SOFT (ICE) FApr 16, 1999 · N769UA · Boeing 777222SDR SCNA99058Apu · fireDURING LINE MAINTENANCE ACTIVITIES, THE APU AUTO SHUT DOWN. UPON RESTART THE APU CAUGHT FIRE. EMERGENCY PROCEDURES FOLLOWED AND AND FIRE BOTTLE DISCHARGED EXTINGUISHING THE FLAMES. REMOVED AND REPLACED THE APU IAW MM PROCEDURES.Mar 25, 1999 · N283SC · Boeing 727225SDR AU990311Turbine · failed(AUS) APU TURBINE SUFFERED A CATASTROPHIC FAILURE. DAMAGE CAUSED TO THE EXHAUST MUFFLER.Mar 24, 1999 · Boeing 737376SDR DLM88990539Apu · malfunctionedEMERGENCY RETURN TO ATL FOR SMOKE IN CABIN. HEAVY WT LANDING 134.8 SMOOTH AND LESS THAN 360 FPM SINK RATE. FOUND OIL IN APU INLET. REPLACED APU, CHECKS NORMAL.Mar 15, 1999 · N965DL · Doug MD88SDR CA990330063Apu · failed(CAN) FLAME OBSERVED COMING FROM APU EXHAUST DUCT, NO INDICATION IN COCKPIT. GROUND CREW ACTIVATED REMOTE FIRE EXTINQUISHER SWITCH, DISCHARGING BOTTLES. APU AND COMPARTMENT INSPECTED WITH NO EVIDENCE OF FIRE OR DAMAGE. BOTTLES REPLACED AND AIRCRAFT RETURNEMar 12, 1999 · Lkheed 10113853SDR CA990323030Apu · fod(CAN) APU SURGING. UNIT REMOVED AND INSPECTED. UPON DISMANTLING THE COMBUSTION SECTION, THE NUT HOLDING THE TURBINE BEARING HOUSING TO THE MAIN BODY WAS MISSING. WHEN THE NUT CAME LOOSE IT WAS EJECTED THROUGH THE TURBINE NOZZLE AND WHEEL ASSY CAUSING UNREPAIMar 11, 1999 · Cvac 340CVACSDR TWAA9903501Turbine · failedTHE APU SEIZED PRIOR TO DISPATCH. FOUND APU LOOSE IN AIRCRAFT DUE TO A FAILURE AT THE APU AIR BOX TO APU MOUNT. SOME TURBINE SECTION PIECES WERE EXPELLED THROUGH THE EXHAUST PIPE AND FOUND ON THE RAMP. REPLACED THE APU. CHECK-C 11-11-98. *S/D* THE APU FAMar 6, 1999 · N9405T · Doug DC983SDR CA990318064Nut · missing(CAN) WHEN STARTING APU, A SURGE SOUND COMING FROM THE UNIT. THE COMPLETE UNIT REPLACED. ON TEARDOWN OF THE HOT SECTION, TWO NUTS WERE MISSING. THE LOSS OF THESE NUTS POSSIBLY CAUSED DAMAGE TO THE TURBINE WHEEL AND NOZZLES.Mar 2, 1999 · Cvac 340CVACSDR AALA990160Apu · defectiveDFW - FLT 102 - DURING TAKEOFF AND CLIMB, FUME SMELL IN CABIN WAS NOTICED BY CREW AND PASSENGERS AND DISSIPATED. ODOR RETURNED DURING DESCENT AND LASTED THROUGH ENGINE SHUTDOWN. MAINTENANCE FOUND APU TO BE CAUSE OF ODOR. REMOVED AND REPLACED APU, CHANGE COAFeb 5, 1999 · N144AA · Doug DC1030SDR CA990301002Bearing · seized(CAN) APU SHUT DOWN DUE TO ROTOR GROUP SEIZURE. THE BEARING WAS A CORRECT ONE, AND FAILED MUCH TOO EARLY.Feb 3, 1999 · Braero HS125700ASDR UPS99228621Cap Assy · crackedINSPECTION TYPE:C APU COMBUSTION UNIT HAS CRACK ON CAP ASSY. COMBUSTION UNIT LINER ASSY REPLACED IAW MM CHP 49-30-22.Jan 29, 1999 · N917UP · Boeing 72730CSDR 99UAL900062Quill Shaft · shearedAN APU TAILPIPE FIRE OCCURRED DURING APU STARTUP. THE APU HAD HEAT DAMAGE. THE AFT AND LT SIDE OF THE FUSELAGE TAIL CONE INSTALLATION (P/N 65-46577-569) ALSO SUFFERED HEAT DAMAGE, AS WELL AS THE LWR I/B 2 FT OF THE LT ELEVATOR (P/N 65C25746-131) & LOWER I/BJan 25, 1999 · N399UA · Boeing 737322SDR CA990203011Turbine Wheel · failed(CAN) THE AUXILIARY POWER UNIT 3RD STAGE TURBINE WHEEL HAD A STRUCTURAL FAILURE, WITH TWO BLADES SEPARATING FROM THE INTEGRAL WHEEL. THE BLADE SEPARATIONS INITIATE FROM CRACKS ADJACENT TO COOLING RIVET HOLES. CRACKS ARE CAUSED BY HIGH TEMPERATURE GRADIENT ACJan 13, 1999 · Boeing 767233SDR CA990203010Compressor Disk · cracked(CAN) INSPECTION OF THE AUXILIARY POWER UNIT FOUND 4TH STAGE COMPRESSOR DISC CRACKED AT THE ACUTE CORNER FORMED BY THE DOVE TAIL AND DISC FRONT FACE. THE SIZE OF THE CRACK WAS APPROXIMATELY 0.300 INCH. THE COMPRESSOR DISC WAS REMOVED AND SCRAPPED.Jan 13, 1999 · Boeing 747*SDR CA990310089Apu · contaminated(CAN) FLIGHT CREW REPORTED A STRONG OILY SMELL IN COCKPIT AND CABIN. AIRCRAFT FERRIED TO HOME BASE. APU CONTAMINATING AIR SYSTEM, REPLACED.Jan 4, 1999 · Fokker F28MK1000SDR C2XA99IA001Apu · failedIAH - DURING PRE-FLIGHT INSPECTION, THE CREW REPORTED SMOKE COMING FROM THE LEFT PACK. MAINTENANCE REMOVED AND REPLACED THE AUXILLARY POWER UNIT AND THE AIRCRFT WAS APPROVED FOR RETURN TO SERVICE. (M)Jan 3, 1999 · N14930 · Emb EMB145SDR 99ZZZM301Apu · failedWHILE PERFORMING PREFLIGHT, THE APUT HAD OIL PRESSURE SHUT DOWN (HIGH OIL CONSUMPTION). REMOVED AND REPLACED APU PER MM, OPS CHECKED GOOD. (M)Jan 1, 1999 · N516AT · Boeing 75723NSDR CA990111049Apu · failed(CAN) INTERMITTENT SMOKE DETECTORS ON ONLY WHEN APU PROVIDING AIR CONDITIONING ON GROUND, NOTICEABLE ODORS IN CABIN. OK WITH GROUND COOLING FAN OR ENGINE AIR USED. APU REPLACED.Dec 29, 1998 · Doug DC932SDR ASAA9880263Clamp · brokenSEA - PRIOR TO DEPARTURE OF FLIGHT 376, CREW REPORTED AUXILIARY POWER UNIT FIRE WARNING LIGHTS ILLUMINATED 3 TO 4 MINUTES AFTER START. SHUT DOWN AUXILIARY POWER UNIT AND DISCHARGED APU FIRE BOTTLE, FIRE WARNING LIGHTS EXTINGUISHED. CREW ONLY WAS ON BOARD AIRDec 13, 1998 · N962AS · Doug DC983SDR AU981638Apu · failed(AUS) DURING ENGINE START, A SHUDDER WAS FELT THROUGHOUT THE AIRCRAFT. THIS WAS ACCOMPANIED BY A LOUD NOISE. INVESTIGATION FOUND THE APU HAD FAILED WITH MANY METAL PIECES BEING EJECTED FROM THE TAILPIPE ONTO THE GROUND.Dec 8, 1998 · Boeing 767238SDR DLM88982342Bearing · failedDURING CLIMBOUT, AFT LAV SMOKE DETECTOR SOUNDED AND SMOKE AND ODOR DETECTED BY FLT. ATTENDENTS. AIRCRAFT RETURNED TO YUL. CONTRACT MTC FOUND OIL LEAKING FROM APU INLET, SUBMITTER SUSPECTS BEARING FAILURE. MTC IN PROCESS OF CLEANING APU COMPARTMENT CHANGING Nov 13, 1998 · N905DL · Doug MD88SDR AU981522Apu · failed(AUS) APU VIBRATION AND AUTO SHUTDOWN FOLLOWED BY FIRE WARNING LIGHT. APU FIRE BOTTLE DISCHARGED.Nov 11, 1998 · Boeing 737376SDR 98UAL900544Apu · fodOIL LIKE ODOR DETECTED IN REAR CABIN AREA. THE ODOR WAS NOT STRONG OR PUNGENT, BUT IT DID SET OFF THE AFT LAV SMOKE DETECTORS. *S/D* THE APU WAS REPLACED DUE TO CONTAMINATED PNEUMATICS. DURING DISASSEMBLY AND SHOP INSPECTION OF THE APU A PLASTIC BAG WAS FONov 10, 1998 · N529UA · Boeing 757222SDR AU981478Apu · failed(AUS) APU FAILED. REAR BEARING HOUSING AND OIL SCAVENGE PUMP FOUND ON THE RAMP. PART TC: 27,149.Nov 9, 1998 · Boeing 767204SDR CA981113019Apu · failed(CAN) SMOKE IN CABIN IN-FLIGHT. APU REPLACED AND APU DIFFUSER DUCTING WASHED, GROUND RUN CARRIED OUT, SYSTEM OK.Oct 28, 1998 · Airbus A320211SDR OXEA9801293Apu · failedPDX - FLT 3050 - AFTER TAKEOFF, THE LAVATORY SMOKE DETECTOR SOUNDED AND CABIN FILLED WITH SMOKE. MAINTENANCE INSPECTED AND FOUND APU AT FAULT. ALSO, FOUND OIL IN WATER SEPARATOR ON BOTH NR 1 AND NR 2 PACKS. (X)Sep 11, 1998 · N496US · Fokker F28MK4000SDR DLM88981874Apu · leakingAFTER T/O, CABIN FILLED WITH ENOUGH HAZE TO SETOFF ALL LAV SMOKE DETECTORS. FLT ATTENDANT REPORTED NO SMOKY SMELL, JUST HAZE IN CABIN, ALSO REPORTED ON SHORT FINAL WITH POWER CHANGES. FOUND APU OIL LEAKING INTO INLET FWD TO MCO/PLAC PER MEL 49-00-01A. RAN BSep 10, 1998 · N904DE · Doug MD88SDR DL73S981844Bolt · missingAPU FIRE WARNING WHILE ON APPROACH. FOLLOWED CHECKLIST. FIRED BOTTLE, FIRE WARNING EXTINGUISHED. FOUND BOLT MISSING FROM FUEL ATOMIZER CAUSING HEAT TO REACH FIRE LOOP.Sep 6, 1998 · N328DL · Boeing 737232SDR AU981146Turbine · failed(AUS) APU TURBINE FAILURE. PART TC: 19,004.Sep 3, 1998 · Boeing 737476SDR CA980909013Apu · malfunctioned(CAN) ON DEPARTURE CLIMB OUT, WHEN AIR CONDITIONING PACKS TURNED ON, SMOKE PRESENT IN CABIN AND FLIGHT DECK. PACKS TURNED OFF AND SMOKE DISSIPATED. AUXILIARY POWER UNIT CHANGED. PACKS OPERATED NORMALLY.Aug 21, 1998 · Cndair CL6002B19SDR SWAA981631Apu · inoperativeAT GATE NOTICED SMOKE IN CABIN. HEAVY SMOKE OUT OF APU TAILPIPE, APU INOP. REMOVED AND REPLACED APU PER BOEING MM.Aug 5, 1998 · N647SW · Boeing 7373H4SDR AWXA9800151Turbine · failedON TAKEOFF, APU LOW OIL PRESSURE LIGHT ILLUMINATED. SHUT DOWN APU, NO OTHER PROBLEMS. UPON INSP FOUND TURBINE WHEEL MISSING, NO DAMAGE NOTED BEYOND MUFFLER AND APU. APU PLACARDED INOP PER MEL. REMOVED AND REPLACED APU ON 4 JUL 98.Jun 23, 1998 · N306AW · Boeing 7373G7SDR CA980706031Compressor · failed(CAN) DURING APU OPERATION, A LOUD NOISE WAS HEARD BY THE MAINTENANCE CREW. THE MECHANIC RIDING THE BRAKES REALIZED THE NOISE WAS CAUSED BY THE SUDDEN STOPPAGE OF THE APU. AFTER A PRELIMINARY INSPECTION, IT WAS CONFIRMED A COMPRESSOR FAILURE OCCURRED. THEREJun 18, 1998 · Cvac 340CVACSDR AALA980989Apu · defectiveDFW - FLT 311 - DURING CLIMB-OUT AUS, FLIGHT CREW NOTICED ACRID SMELL IN CABIN WITH SOME SMOKE AND HAZE. FLIGHT CONTINUED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED AUXILIARY POWER UNIT AND AS A PRECAUTIONARY, REPLACED BOTH COALESCER GAGS. OPERATIONS CHECMay 16, 1998 · N450AA · Doug DC982SDR AALA980847Apu · leakingMIA - FLT 1327 - DURING TAKEOFF, FLIGHT CREW NOTICED SMOKE IN THE CABIN. FLIGHT AIR INTERRUPTED AND RETURNED TO MIA AND LANDED WITHOUT FURTHER INCIDENT. UPON LANDING, SMOKE DISSIPATED FOR THE CABIN. MAINTENANCE FOUND THE APU LEAKING OIL INTO THE AIR CONDITIApr 28, 1998 · N476AA · Doug DC982SDR 98UAL900167Apu · smokingABORTED TAKEOFF DUE TO SMOKE COMING OUT OF THE APU. LOW OIL PRESSURE LIGHT WAS ON.Apr 28, 1998 · N983UA · Boeing 737291SDR AU980420Compressor · failed(AUS) APU LOAD COMPRESSOR FAILED AT THE GROOVED SECTION OF THE AFT FACE DAMPING RING. COMPRESSOR AND DIFFUSER PIECES HAD EXITED THROUGH THE APU SCROLL CASING SEVERING AN OIL LINE. METAL DEBRIS HAD ALSO PUNCHED A 100MM (4 INCH) HOLE THROUGH THE LOWER APU ACCESApr 11, 1998 · Airbus A320212SDR 98ZZZX1591Housing · crackedDURING APU HOT SECTION INSPECTION AND REPAIR DISASSEMBLY, MECHANIC FOUND A 10 INCH CRACK IN THE HOUSING AND 2 OTHERS, .750 INCH AND .385 INCH, IN THE SAME PLANE. CRACKS WERE LOCATED ADJACENT TO THE SPOT WELDS FOR THE AIR EXIT PLENUM DOUBLER. THE APU IS LOCATMar 11, 1998SDR ORJA9838Apu · inoperativeAT PUSH BACK, FOUND APU TO BE INOP RETURNED TO GATE, REF DMI NR 13018. (M)Mar 10, 1998 · N755RA · Doug DC987SDR DLM88980432Apu · failedAPU SHUTDOWN AUTOMATICLLY, ATTEMPT AT RESTART UNSUCCESSFUL. LEFT GENERATOR ON MCO. DIVERTED TO CVG. REPLACED APU.Feb 21, 1998 · N991DL · Doug MD88SDR USAASB98038Apu · oil contaminatedCLT - FLT 2333 - AIRCRAFT WAS DISPATCHED FROM DCA WITH THE NR 1 ENGINE CSD/GENERATOR ON MEL. AT FL 350, THE APU HAD AN AUTO SHUTDOWN WITH HIGH OIL TEMP. FLIGHT DIVERTED TO CLT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUNFeb 13, 1998 · N574US · Boeing 737301SDR CALA9800083Torus · crackedINSPECTION FOUND A 5 INCH CRACK IN INBOARD WELD SEAM OF APU TORUS ASSEMBLY. THE APU WAS REMOVED AND REPLACED IAW MM 49-10-01. LEAK AND OPERATIONAL CHECKS WERE GOOD.Jan 19, 1998 · N17407 · Boeing 727243
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