JASC 4900

Service difficulty reports · 1,840

Reports filed under 4900 · Airborne Auxiliary Power Unit (APU) 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 = '4900'
  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 CA971015007Apu · failed(CAN) DURING TAXI WHEN APU AIR WAS SELECTED ON THERE WAS A SMELL FROM THE AIR CONDITIONING SYSTEM. APU REPLACED.Sep 30, 1997 · Bag BAE146200ASDR AWXA9700584Inlet · dirtyCABIN CREW REPORTS STRONG ODOR IN CABIN DURING FLIGHT. HIGH FLOW PACK OPERATION INCREASED ODOR. WASHED APU INLET, DOOR INLET AND COMPARTMENT. NO EXTERNAL OIL LEAKS NOTED, SMELL CHECK OK.Sep 25, 1997 · N639AW · Airbus A320232SDR AWXA9700559Apu · odorFLIGHT ATTENDENT INFORMED FLIGHT DECK OF FUEL SMELL IN AFT OF AIRCRAFT. APU WAS SHUT DOWN IN FLIGHT. FUEL SMELL GRADUALLY DISAPPEARED. SMELL WAS NOTICED IN FLIGHT ONLY AFTER TAKEOFF. RAN APU. SELECTED PACKS ON, NO SMELL NOTED. NO EXTERNAL FUEL LEAKS NOTISep 10, 1997 · N643AW · Airbus A320231SDR 97UAL900682Circuit Breaker · trippedAPU INOP AT DEPARTURE TIME. *S/D* RESET APU CIRCUIT BREAKER AND STARTED APU. OBSERVED BATTERY VOLTS AND CHARGER OUTPUT, ALL INDICATIONS NORMAL. LEFT APU RUNNING, AND AFTER 20 MINUTES APU STILL OPERATED NORMAL. NO OTHER CAUSES FOUND.Sep 4, 1997 · N503UA · Boeing 757222SDR CALA9701256Apu · malfunctionedWHILE OPERATING THE APU WITH THE NR 2 GENERATOR PLACARD INOPERATIVE, THE APU FLAMED OUT AT FL 310. A RESTART ATTEMPT WAS UNSUCCESSFUL. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE STARTED THE APU SEVERAL TIMES AND RAN IT FOAug 28, 1997 · N16893 · Doug DC982SDR ASAA9780156Apu · defectiveSEA - AIR TURN BACK OF FLT 442 - CREW REPORTED HYDRAULIC FLUID ODOR IN CABIN. REPLACED BOTH WATER SEPARATOR COALESCERS, NO CONTAMINATION OR ODOR NOTED. ODOR APPEARS TO BE COMING FROM RIGHT AIR CONDITIONING PACK. REPLACED RIGHT COOLING TURBINE, ODOR STILL PRJul 22, 1997 · N957AS · Doug DC982SDR USAAF97061Seal · failedCLT/TYS - FLT 589 - DURING DESCENT INTO CLT AFTER STARTING THE APU, CREW ACTIVATED THE SPEED BRAKE AND RECEIVED A MOMENTARY 'APU FIRE' WARNING. THE APU AUTO-SHUTDOWN AND FIRED THE BOTTLE. THE FLIGHT LANDED AT TYS WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTJul 17, 1997 · N863US · Fokker F28MK0100SDR 97ZZZX4222Seal · failedCLT/TYS - FLT 589 - DURING DESCENT INTO CLT AFTER STARTING THE APU, CREW ACTIVATED THE SPEED BRAKE AND RECEIVED A MOMENTARY 'APU FIRE' WARNING. THE APU AUTO-SHUTDOWN AND FIRED THE BOTTLE. THE FLIGHT LANDED AT TYS WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTJul 17, 1997 · N863US · Fokker F28MK0100SDR 97ZZZX4221Seal · failedCLT/TYS - FLT 589 - DURING DESCENT INTO CLT AFTER STARTING THE APU, CREW ACTIVATED THE SPEED BRAKE AND RECEIVED A MOMENTARY 'APU FIRE' WARNING. THE APU AUTO-SHUTDOWN AND FIRED THE BOTTLE. THE FLIGHT LANDED AT TYS WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTJul 17, 1997 · N863US · Fokker F28MK0100SDR CA970624016Apu System · cabin smoke(CAN) AUXILIARY POWER UNIT SHUT DOWN PRIOR TO TAXIING. THROUGH 700 FEET STRONG SMOKE SMELL WITH HAZE PRESENT IN FLT DECK & CABIN. SMOKE ALARMS ACTIVATED IN BOTH LAVATORIES & APU POWER AVAILABLE LIGHT ON APU & GEN OFF LIGHT ON. APU FIRE DRILL CARRIED OUT, FIREJun 2, 1997 · Doug DC932SDR USAAF97045Apu · failedFLT 654 - CLT-ROA - AFTER AIRCRAFT PULLED AWAY FROM THE JETWAY FOR DEPARTURE, THE APU FAILED. THE CABIN FILLED WITH SMOKE. THE LAVATORY SMOKE DETECTOR SOUNDED, BUT THERE WAS NO APU FIRE INDICATION IN THE COCKPIT. PASSENGERS WERE EVACUATED DOWN THE ENTRY DOOMay 12, 1997 · N494US · Fokker F28MK4000SDR CALA9700673Apu · malfunctionedWHILE OPERATING THE APU EN ROUTE, WITH THE LEFT GENERATOR PLACARDED INOPERATIVE. THE APU FAULT LIGHT ILLUMINATED AND UTILITY BUSSES AUTOMATICALLY SHED LOAD. THE AIRCRAFT WAS RETURNED TO SEA WHERE IT LANDED WITHOUT INCIDENT. THE APU WAS LOADED WITH THREE ELEMay 11, 1997 · N17104 · Boeing 757224SDR COMA9710243Apu · fireVISABLE FIRE COMING FROM APU. FIRE EXTINGUISHER WAS DISCHARGED. REPLACED FIRE BOTTLE AND OPERATION OF APU FOUND TO BE NORMAL. NO DEFECTS FOUND AND SYSTEM RETURNED TO SERVICE.May 7, 1997 · N463CA · Emb EMB120RTSDR 97UAL900347Connector · dirtyAPU ALTITUDE START FAILED AT ALTITUDE LEVEL 350, FAULT LIGHT ILLUMINATED. SUPPLEMENTAL DATA UPDATE, FOUND THE TORQUE MOTOR CANNON PLUG CONNECTOR DIRTY AND LOOSE. CLEANED AND SECURED CANNON PLUG. REPLACED THE FUEL CONTROL UNIT, THE IGNITION EXCITER BOX AND IMay 1, 1997 · N587UA · Boeing 757222SDR AALA970844Apu · defectiveMIA - FLT 903 - AFTER TAKEOFF MIA DURING INITIAL CLIMB-OUT, ECAM MESSAGE MINIMUM EQUIPMENT BAY SMOKE WARNING. WARNING WENT AWAY ON ECAM AFTER APPROX 3 MINUTES. A/C RETURNED TO MIA AND DURING APPROACH, SMOKE ODOR NOTED IN COCKPIT. AIRCRAFT LANDED MIA WITHOUTApr 30, 1997 · N80084 · Airbus A300B4605RSDR W8PA970182Apu · burnedAPU FIRE WARNING ILLUMINATED WHEN CREW STARTED THE APU ON APPROACH. CREW DISCHARGED FIRE EXTINGUISHER. MAINTENANCE VERIFIED THERE WAS A FIRE AROUND THE EGT THERMOCOUPLE AREA. (M)Apr 16, 1997 · N962WP · Boeing 7373Y0SDR QXEA9700129Apu · defectiveBOI- DURING CLIMB, SMOKE DETECTOR WENT OFF IN LAVATORY. FLIGHT ATTENDANT NOTICED HAZE WITHIN THE CABIN, BUT COULD NOT FIND A SOURCE OF SMOKE. AIRCRAFT RETURNED TO BOISE AND MADE A OVERWEIGHT LANDING. COMPLIED WITH OVERWEIGHT LANDING INSPECTION, NO DEFECTS NApr 16, 1997 · N452US · Fokker F28MK1000SDR 9707722712Apu · smokingDURING TAXI OUT, SMOKE BEGAN TO ENTER AIRCRAFT CABIN. AIRCRAFT RETURNED TO THE GATE AND PASSENGERS DEPLANED THROUGH THE JET WAY. MAINTENANCE FOUND APU TO BE THE SOURCE OF SMOKE, RESIDUAL DE-ICE FLUID SUSPECTED. APU MEL'D.Apr 15, 1997 · N712RC · Boeing 7272S7SDR GTIA9700187Connector · looseACY - FLT 514 - DURING PUSH BACK AT RSW, APU SHUT ITSELF DOWN FOR NO REASON. A RESTART WAS SUCCESSFUL, BUT APU AGAIN SHUT ITSELF OFF AFTER APPROXIMATELY 30 SECONDS. FOUND LOOSE CANNON PLUG ON CENTRIFUGAL SWITCH, SECURED, AND SERVICED OIL IAW 49-60-1. OPS CHMar 8, 1997 · N125NK · Doug DC921SDR QXEA9700022Apu · odorSTRONG BURNING ODOR FILLS COCKPIT AND CABIN WITH COCKPIT PACK ON AND DUCT TEMPERATURE ABOVE 20 DEGREES CENTIGRADE. ODOR IS GONE WHEN THE COCKPIT PACK IS OFF, PROBLEM TRACED TO THE APU. APU REPLACED IAW MAINTENANCE MANUAL, APU AIR OPS CHECKED GOOD ON RUN.Feb 3, 1997 · N462AU · Fokker F28MK1000SDR 97UAL900070Surge Valve · defectiveTHE APU SHUTDOWN PRIOR TO ENGINE START. THE APU WOULD NOT RESTART. *S/D* THE SURGE CONTROL VALVE WAS DEFECTIVE AND REPLACED, OPERATIONS CHECK NORMAL. NO OTHER APU DISCREPANCIES HAVE OCCURRED SINCE THIS INCIDENT.Jan 26, 1997 · N663UA · Boeing 767322SDR COMA9710048Apu · malfunctionedAUXILIARY POWER UNIT START CYCLE HUNG AT 45 DEGREES, START CYCLE WAS ABORTED, DISCHARGED AUXILIARY POWER UNIT FIRE EXTINGUISHER AFTER REPORT OF FIRE. INSPECTED AUXILIARY POWER UNIT AND COMPARTMENT, NO DEFECTS NOTED. DEFERRED AUXILIARY POWER UNIT AND AUXILIARJan 19, 1997 · N244CA · Emb EMB120RTSDR 97UAL900027Contactor · failedAPU SHUT DOWN AT GATE. AIRCRAFT WILL NOT ACCEPT APU POWER. INVESTIGATION REVEALS CONTACTOR (START RELAY) FAILED (WOULD NOT CLOSE). REPLACED PN BP493-1. OPERATIONAL CHECK OK.Jan 3, 1997 · N781UA · Boeing 777222SDR DL76L962736Apu · failedAT GATE, APU MADE EXPLOSION NOISE AND GEN DROPPED OFF LINE, AIRPLANE SHOOK AND EXHAUST SMOKE OBSERVED. PULLED APU FIRE HANDLE. MAINT DETERMINED APU TO BE AN INTERNAL FAILURE, REMOVED APU.Dec 18, 1996 · N186DN · Boeing 767332SDR 9625199995Apu · malfunctionedDURING TAXI OUT, SMOKE WAS NOTICED IN AFT CABIN AREA. SHORTLY THEREAFTER, APU AUTO SHUTDOWN. AC WAS TOWED BACK TO THE GATE. SOURCE OF SMOKE WAS ISOLATED TO THE APU. APU REMOVED AND REPLACED, AC RETURNED TO SERVICE.Nov 24, 1996 · N8978E · Doug DC931SDR AALA961723Apu · defectiveSJC - FLT 1156 - AFTER TAKEOFF SJC DURING CLIMB-OUT, SMOKE NOTED IN COCKPIT AND CABIN. AIRCRAFT RETURNED TO SJC AND LANDED OVERWEIGHT WITHOUT INCIDENT. ACCOMPLISHED PACK BURNOUT PROCEDURES AND OVERWEIGHT LANDING INSPECTION WITH NO DEFECTS FOUND. REPLACED APNov 23, 1996 · N513AA · Doug DC982SDR 96UAL900841O-Ring · saturatedAIRCRAFT RETURNED TO BLOCKS DUE TO SMOKE IN THE CABIN. UNABLE TO CLEAR CABIN WITH ANY PACK BLEED COMBINATION. *S/D* REMOVED AND REPLACED WATER SOCKS, REPLACED O-RINGS ON BOTH SPEED SENSORS AND APU CHECKS OK.Oct 29, 1996 · N922UA · Boeing 737522SDR DLM88962368Apu · dirtySMOKE REPORTED IN AFT CABIN IMMEDIATELY AFTER T/O. AFT LAV\SMOKE DETECTOR WENT OFF, UNUSUAL SMELL IN COCKPIT. FOUND OIL LEAKING FROM APU, FWD APU TO MCO AND PLAC. CLEANED OILY AREA AROUND APU INLET, REPLACED WATER SEPARATOR BAGS AND SYSTEM CHECKS NORMAL.Oct 21, 1996 · N970DL · Doug MD88SDR CALA9601384Apu · malfunctionedWHILE OPERATING THE APU EN ROUTE WITH THE NR 2 GENERATOR PLACARDED INOPERATIVE, THE APU FAILED. THE AIRCRAFT WAS DIVERTED TO MSY WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE OPERATED THE APU UNDER FULL LOAD WHILE ON THE GROUND AT MSY AND APU OPERATION WAS NOct 5, 1996 · N72830 · Doug DC982SDR DL757962024Ground Stud · damagedAFT CBN FILLED WITH SMOKE UPON LANDING AFTER F/A TURNED ON OVHD LIGHTS. FOUND GROUND STUDS FOR APU START BAT TO SHOW HEAT DAMAGE. CLEANED AREA AND SECURED STUDS AND RECONNECTED WIRING. DEACT APU, ATL TO ROUTE A/C FOR EO 6-66173 APU GROUND STUD WIRING MOD.Aug 31, 1996 · N680DA · Boeing 757232SDR 96UAL900599Fan · failedLIGHT SMOKE IN COCKPIT WITH PACS ON AND APU RUNNING. *S/D* APU WAS REPLACED DUE TO MASSIVE COOLING FAN FAILURE. FAN ROTOR FAILED, HOUSING WAS BROKEN AND MINOR FOD TO BOTH COMPRESSORS. FAILED APU REPLACED WITH NEW UNIT, OPERATION CHECKS NORMAL.Aug 6, 1996 · N516UA · Boeing 757222SDR QXEA9600247Apu · failedAPU AUTO SHUTDOWN CABIN AND COCKPIT FILLED WITH SMOKE. AIRCRAFT WAS PARKED AT THE GATE. PROBLEM TRACED TO APU, APU PLACED ON MEL 49-1.Jul 14, 1996 · N487US · Fokker F28MK4000SDR 9613101146Apu · firePRIOR TO PUSHBACK, APU TAILPIPE FIRE DEVELOPED. AIRCRAFT APU FIRE BOTTLES WERE DISCHARGED AND FLAMES EXTINGUISHED. THE PASSENGERS WERE DEPLANED THROUGHT THE JETWAY WITHOUT INCIDENT. NO SMOKE WAS PRESENT IN CABIN. MAINTENANCE INSPECTED APU AND SURROUNDING SJun 15, 1996 · N146US · Doug DC1040SDR 9608099950Apu · malfunctionedBEFORE DEPARTURE, THE LEFT LAV FIRE DETECTOR WENT OFF, NO FIRE NOTED BUT FUMES WERE IN CABIN. AIRCRAFT RETURNED TO THE GATE. GROUND MAINTENANCE FOUND SOURCE OF FUMES CAME FROM THE APU. APU WAS PLACED ON MEL AND AIRCRAFT RETURNED TO SERVICE.Apr 9, 1996 · N9346 · Doug DC932SDR AU960333Panel · cracked(AUS) APU CENTRAL FIRE BOX PANEL CRACKED IN THREE PLACES - FOUND DURING INSPECTION IAW AD/BAE146/53 AMDT1Mar 21, 1996 · Bac 146200ASDR 96UAL900193Apu · malfunctionedPUNGENT ODOR OF SMOKE IN AIRCRAFT ON ENGINE PNEUMATICS AT HIGH ENGINE POWER. ODOR ISOLATED TO NR 2 PNEUMATICS WHEN USING APU BLEED. REPLACED APU.Mar 15, 1996 · N1858U · Doug DC1030SDR CA960417507Aux.Power Unit · leaking oil(CAN)STRONG OIL SMELL IN CABIN WHEN APU USED. MAINTENANCE FOUND APU LEAKING OIL. APU CHANGED.Mar 14, 1996 · Doug DC932SDR DL76S960391Apu · malfunctionedON TAXI OUT, TOWER NOTIFIED OF APU FIRE, NO COCKPIT INDICATION. DISCHARGED BOTTLE, INSPECTED APU AREA AND EXHAUST FOR DAMAGE AND SMOKE, NONE FOUND. INSPECTED TAIL SECTION AREA FOR DAMAGE, NONE FOUND. APU DEFFERED PER MEL 49-11-01A. SUSPECT TAIL PIPE FIRE, Feb 20, 1996 · N125DL · Boeing 767332SDR HALA9607Apu · failureOGG - PRIOR TO TAKEOFF, UNKNOWN SMOKE FILLED THE COCKPIT AND PASSENGER CABIN. CONDUCTED EMERGENCY EVACUATION. MAINTENANCE INSPECTION DISCLOSED APU FAILURE RESULTED IN APU OIL TO ENTER BLEED AIR SYSTEM CAUSING SMOKE. APU WAS REPLACED AND ALL SYSTEM CHECK NORFeb 3, 1996 · N2FOR · Doug DC951SDR CAL960070Apu · malfunctionedFLT NR 483 - DCA - OPERATING THE APU WITH THE NR 1 GENERATOR PLACARDED INOPERATIVE. THE APU SHUT DOWN DURING CLIMB-OUT OF BWI. AN APU RESTART ATTEMPT WAS UNSUCCESSFUL. THE AIRCRAFT WAS DIVERTED TO DCA WHERE IT MADE A NORMAL LANDING. MAINTENANCE STARTED THEJan 30, 1996 · N16893 · Doug DC982SDR CA960208101Apu · smoking(CAN)PRIOR TO DEPARTURE, APU AUTO SHUT DOWN, EMITTING CLOUDS OF SMOKE. APU WAS MEL'D AND AIRCRAFT DEPARTED. ON CLIMB, CABIN AIR CONDITIONING SYSTEM DISCHARGED OIL VAPOURS. AIRCRAFT RETURNED TO BLOCKS AND C OMPLETED AN OVERWEIGHT LANDING. OVERWEIGHT LANDING CHEJan 26, 1996 · Doug DC1030SDR USAASB96018Aux Power Unit · failedFLT NR 1184 - BWI - ON FINAL APPROACH APU FIRE WARNING MOMENTARILY WENT OFF. FIRED FIRE BOTTLE. MAINTENANCE REPLACED THE APU. (M)Jan 22, 1996 · N234US · Boeing 737201SDR CA960320520Aux Power Unit · oil leak(CAN)DURING PUSH BACK, CABIN FILLED WITH SMOKE, BOTH REAR SMOKE DETECTORS SOUNDED. MAINTENANCE FOUND PROBLEM CAUSED BY A.P.U.AUXILIARY POWER UNIT REPLACED.LEAK AND OPERATIONAL CHECK CARRIED OUT.Jan 21, 1996 · Doug DC932SDR P5CA9600194Bracket · crackedFOUND APU COMPARTMENT BRACKETS AT BS 2710 TO 2716 CRACKED. REPLACED BRACKET IAW MM 51-10-03.Jan 19, 1996 · N853FT · Boeing 747122SDR 96UAL900046Apu · smokingCREW REPORTED SMOKE AND FIRE COMING FROM APU ON ARRIVAL. RESET CB AND APU STARTED, NO SMOKE. COULD NOT DUPLICATE.Jan 19, 1996 · N7289U · Boeing 727222SDR MWEA96016Apu · injested sprayMKE - CREW REPORTS, AFTER LANDING THE LT LAV SMOKE DETECTOR SOUNDED. FLIGHT ATTENDANTS REPORT SMELLING FUEL FUMES AND THE CABIN SLIGHTLY CLOUDED. RAN BOTH PACKS ON GROUND AND COULD NOT DUPLICATE SMOKE OR FUMES IN CABIN. SMOKE DETECTOR OPS CHECK GOOD. SUBMJan 18, 1996 · N204ME · Doug DC932SDR 96ZZZX661Connector · contaminatedNOTE: THIS IS CLOSING ACTION FOR SDR SUBMITTED 1-18-96, SAME AIRCRAFT. PROBLEM: IN CRUISE AT FL 310, APU CRANK LIGHT ILLUMINATED FOLLOWED BY APU EGT RISE TO 300 DEGREES. PULLED THE APU FIRE HANDLE AND APU CONTROL BUS CIRCUIT BREAKER AT WHICH TIME THE APU SJan 18, 1996 · N432EX · Boeing 727151CSDR COMA9660011Apu · smokingWHILE APU WAS OPERATING AND AC PACKS IN OPERATION, THE CABIN BEGAN TO FILL WITH SMOKE. SEVERAL SECONDS LATER THE APU AUTO-SHUTDOWN OCCURRED.Jan 11, 1996 · N924CA · Cndair CL6002B19SDR 9600531211Apu · failedDURING CLIMB, A STRONG OIL SMELL WAS PRESENT THROUGH OUT THE AIRCRAFT. FLIGHT CREW FOLLOWED SMOKE REMOVAL PROCEDURES, BUT ODOR COULD NOT BE ISOLATED. FLIGHT RETURNED TO DEPARTURE AIRPORT LANDING WITHOUT FURTHER INCIDENT. GROUND PERSONNEL REMOVED AND REPLACEJan 11, 1996 · N211NW · Doug DC1030SDR 96UAL900018Apu · failedAPU AUTO-SHUTDOWN AND SMOKE CAME OUT OF WHEEL WELL AREA.Jan 9, 1996 · N7460U · Boeing 727222
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