JASC 4950
Service difficulty reports · 951
Reports filed under 4950 · APU Bleed Air 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 = '4950' 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 = '4950' 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 UALA2013020400683O-Ring · failedAPU PRODUCING NO AIR. PERFORMED APU ECU BITE TEST IAW AMM. FOUND PT SENSOR AT FAULT. REPLACED O-RINGS AS PER 49-53-05.SDR UALA2013012900530Bleed Valve · inoperativeAPU BLEED VALVE INOPERATIVE. REPLACED APU BLEED AIR VALVE, OPS CHECKED GOOD.SDR DXTA2013010305227Apu · smokeAFTER MX FOR APU BLEED AIR SMOKE IN CABIN, WE RAN APU 10 MINUTES, BLEED AIR ON FOR 5 MINUTES, SMELLED SMOKE, THEN OBSERVED BLUE SMOKE COMING OUT FLOOR AISLE VENTS. SHUTDOWN IMMEDIATELY. TROUBLESHOOTING PERFORMED AND FOUND THAT THE APU WAS LEAKING OIL INTERNASDR CA130114001Rod End · broken(CAN) APU FAILED TO START ON GROUND. PILOT REPORTED IT, MAINTENANCE HAVE PUT SYS ON MEL 49-01. DURING NIGHT TURN-OVER MAINTENANCE TROUBLESHOT FAULTY APU START AND FOUND APU INLET DOOR ROD END, X2, BROKEN, ACTUATOR STILL WORKING GOOD.SDR VNAA2012123100017Control Valve · failedON DESCENT, CREW STARTED APU, TRANSFERRED BLEEDS AND SMELLED OIL SMELL AND SAW APU ITT IN YELLOW. CREW REPORTED SMELL GETTING WORSE AND TRANSFERRED BLEEDS BACK TO ENGINES AND THEN GOT APU FIRE FAIL AMBER MESSAGE. CREW TURNED OFF APU AND LANDED WITHOUT INCIDESDR USAA2012123100004Cooling Fan · leakingDURING TAKEOFF, CREW EXPERIENCED A STRONG OIL SMELL FOR 10-15 MINUTES. SMELL DISSIPATED SLOWLY TO NO SMELL, CONTINUED UPON DESCENT POWER IDLE. STRONG OIL SMELL RETURNED UNTIL TAXI-IN. APU WAS NOT IN USE. MAINTENANCE ACCOMPLISHED CABIN AIR QUALITY J/C 26L00SDR UALA2012120607067Module · faultyAPU ALTITUDE NO START - VERIFICATION APU HANGS BETWEEN 30 TO 50% DURING START. TRIED 3 APU STARTS FL380 TAT-41RPM PEAK 40% THEN APU FAULT EICAS. ACP'D BITE TEST OF APUCU. FAULTED "PT SENSOR". REPLACED FLOW SENSING MODULE IAW AMM. APU START NORMAL.SDR ASAA2012120493405Actuator · malfunctionedAPU SURGING, GROUND MECH SAID APU MADE BOOM SOUNDS. OIL PRESSURE LOOKED GOOD, DUCT PRESSURE VARIED AS APU WOUND DOWN & SPOOLED BACK UP. APU EGT DECREASED AND INCREASED. PERFORMED FIM TASK 49-55, TASK 808 MULTIPLE SURGE CONDITION DURING MES OPS . IAW TECHSDR UALA2012112806833Bleed Air Sys · malfunctionedNO AIR FROM APU, WAS WORKING FINE. BITE OF ECU, AND SHUTDOWN AND RESTART APU. BLEED OPERATES NORMALLY.SDR 2012F00264Apu · malfunctionedAIR PORTION OF THE APU FAILED WITH APU ELECTRONICS OPERATIONAL. COMPLETED FIM 49-11 TASK 827 WITH NO FAULTS NOTED. STARTED APU, ALL OPS CHECKED GOOD.SDR UALA2012112606769Module · malfunctionedAPU SHUTS DOWN WITH FAULT LIGHT. APU AUTO SHUT DOWN TWICE, NO WORK. REPLACED APU FLOW SENSING MODULE IAW AMM. APU OPS CHECK NORMAL.SDR UALA2012102906231Control Valve · faultyAPU BLEED AIR STATUS MSG. APU BLEED AIR INOP, APU AIR SWITCH POSITIONED OFF, PLACARDS APPLIED, FWD TO DF MCC INFORMED. -RDF-T :REPLACED APU CONTROLLER PER AMM, NO HELP. INF- :MR49622-37 OFF.MR49622-32 ON. REPLACED SURGE CONTROL VALVE OPS CK'D NORMAL.SDR UALA2012102506129Control Valve · faultyAPU BLEED STATUS AT THE GATE. REPLACED APU SURGE CONTROL VALVE PER MM, OPS NORMAL.SDR UALA2012101805965Shutoff Valve · malfunctionedAPU BLEED IS INOP, NOT IND PRESSURE. CHRONIC PROBLEM. CREW COMPLIED WITH MEL. APU BLEED VALVE IS CLOSED AND SWITCH IS PLACARD. APU BLEED SHUT-OFF VALVE, FLOW SENSING MODULE REPLACED 16OCT2012. PERFORMED OPS CHECK OF APU LOADED AND UNLOADED VOLTS FREQS ANDSDR USAA2012100800015Retainer · crackedFUEL SMELL WHEN APU AIR WAS SELECTED ON AFTER ENGINE SHUT DOWN. FLIGHT ATTENDANTS REPORTED FEELING LIGHT-HEADED, SHAKY AND IRRITATED THROATS, AND SOUGHT MEDICAL TREATMENT. MAINTENANCE REMOVED AND REPLACED THE APU LOAD CONTROL VALVE IAW AIRBUS MAINTENANCE MANSDR UIEA2012092200438Bleed Valve · failedDURING ENGINE START APU DIED TWICE, AFTER GOING TO BLEED OFF, KEPT BLEED ON ON APU TO START ENGINES. R & R SURGE BLEED VALVE, OPS AND LEAK CHECKS SATISFACTORY, OK FOR RETURN TO SERVICE, REF AMM 49-53-01.SDR UALA2012091905300Duct · brokenFLEXIBLE DUCT OF THE APU SURGE DUCT ASSY FOUND WITH BELLOWS BROKEN OFF. REPLACED FLEX DUCTSDR UALA2012090404981Pressure Sensor · faultyAPU BLEED AIR INOP. REMOVED AND REPLACED APU INLET PRESSURE SENSOR P2 IAW AMM, OPS CHECKS NORMAL.SDR UALA2012090404924Valve · failedAPU AUTO SHUTDOWN. TIGHTEN INLET TEMPERATURE SENSOR IAW AMM 49-6103. REPLACED APU SURGE VALVE. OPS CHECK NORMAL, NO LEAKS NOTED. APU START NORMAL. NO AUTO SHUT DOWN NOTED.SDR USAA2012082800008Packing · deterioratedTWICE IN-FLIGHT, SMELLED BURNT PLASTIC ODOR. ODOR VERY STRONG. FOUND APU COMPARTMENT DOORS VERY WET. AIR/OIL SEPARATOR SPITTING OIL FROM VENT LINE AT HOLD DOWN CLAMP ON TOP OF GEARBOX. REMOVED AND REPLACED DETERIORATED PACKING PER AMM 49-51-51-401.SDR UALA2012080704240Valve · faultyAPU BLEED AIR ONLY 8PSI , UNABLE TO START EITHER ENGINE. REPLACED APU SURGE CONTROL VALVE AND AIR SUPPLY SHUTOFF VALVE. APU BLEED PSI NORMAL WITH BOTH PACKS ON AND CTR ADP ON, APU BLEED PSI NORMAL DURING ENGINE DRY MOTOR.SDR IPXA2M74647Bleed Valve · inoperativeWITH LEVEL II, AIR SYS 2 PRESSURE LOW ON DESCENT LEVEL II, AIR SYSTEM 1, PRESSURE LOW ILLUMINATED. EMERGENCY DECLARED. SHORTLY AFTER LEVEL II, AIR SYS 3, PRESSURE LOW (NO CABIN PRESSURE). ACCOMPLISHED EMERGENCY DESCENT. R & R APU LOAD BLEED VALVE IAW AMM 36-SDR UALA2012080604202Valve · faultyAPU BLEED AIR APUC DETECTED LOSS OF ABILITY TO PNEUMATICALLY LOAD APU. MESSAGE IS TRIGGERED BY IGV OR SURGE CONTROL SYSTEM FAULTS. APU BLEED AIR FAULT. APU BLEED WORKS BUT MESSAGE IS LATCHED. SURGE CONTROL VALVE IS IN DISAGREEMENT. REPLACED SURGE VALVE.SDR DALA1242510975Duct · contaminatedON TAKEOFF, CABIN CREW NOTIFIED FLIGHT CREW OF A BURNING ODOR IN THE CABIN. FLIGHT CREW THEN PERFORMED AN UNEVENTFUL AIR TURN BACK. ON INSPECTION, MAINTENANCE FOUND OIL IN THE APU BLEED DUCT. MAINTENANCE PERFORMED A DUCT BURN OUT AND RETURNED THE AIRCRAFT TSDR UALA2012071103706Check Valve · wornAPU CHECK VALVE IS WORN. INSTALLED SERVICEABLE APU CHECK VALVE. COMPLETED INSTALLATION OF APU CHECK VALVE IAW AMM 36-11-11.SDR QXEA2012062400532Bleed Air Sys · smokeWHILE WAITING TO REFUEL, SMOKE APPEARED AT EYEBALL VENTS AND BEGAN TO FILL CABIN, AFTER TURNING APU OFF, SMOKE DISSIPATED. OBTAINED "AIR CONTAMINATION CHECKLIST" DATA FROM FLIGHT CREW PERFORMED GVI OF APU FOR EXTERNAL OIL LEAKAGE, NONE NOTED. PERFORMED OIL LESDR ASAA2012061592340Apu · odorVERY STRONG DIRTY SOCK ODOR IN DESCENT. STARTED WHEN BELOW 10,000. R & R APU IAW T/C 78349010. OPS AND LEAK CHECK GOOD.SDR 9JLA2012071904455Control Valve · defectiveCREW REPORTED THAT THE APU BLEED AIR WAS INOPERATIVE. TROUBLESHOOTING INDICATED THAT THE APU BLEED AIR CONTROL VALVE WAS DEFECTIVE. AN OVERHAULED VALVE WAS INSTALLED, FUNCTIONAL CHECKED SATISFACTORY.SDR DALA1234725534Duct · damagedSMOKE IN THE BACK OF THE AIRCRAFT ACCOMPANIED BY HOT AIR AND WARM FLOOR. CLOSED APU BLEED VALVE HEAT AND DEBRIS BEGAN TO DISSIPATE FOUND APU BLEED DUCT IN AFT CARGO BIN JUST FWD OF PRESSURE BULKHEAD WITH A 3/8 INCH HOLE AT MOUNT CLAMP FWD TO MEL PER 36-11-04.SDR UALA2012052502927Bleed Valve · stickingAPU NOT PUTTING OUT AIR PRESSURE. APU AIR PRESSURE NORMAL, NO PACKS ON 32 PSI, 2 PACKS ON 28 PSI, MOTOR 1 ENG, DIPS TO 25 PSI RECOVERS TO 32 PSI. SUSPECT STICKING APU BLEED VALVE.SDR HALA2012051000132Ecu · faultedPRIOR TO ENGINE START, APU FAULTED AND AUTO SHUTDOWN. BITE CHECKED APU ECU FOUND REVERSE FLOW FAULT. PERFORMED FIM 49-11-00-1 FIG 108. GROUND OPS CHECKED OK.SDR HALA2012042800128Pressure Switch · failedDURING CLIMB FAULT LIGHT ILLUMINATED FOLLOWED BY APU SHUTDOWN. ATTEMPTED RESTART IAW QRH. UNSUCCESSFUL. TROUBLESHOT IAW 49-11-00-1 FIM AND FOUND DELTA PRESSURE SWITCH FAULTY. R & R IAW AMM 49-27-15/401. OPS CKD NORMAL. ACFT OK FOR SERVICE.SDR UIEA2012042500165Gasket · damagedGASKET DAMAGED ON FLOW SENSOR MODULE ON APU. REPLACED GASKET ON FLOW SENSER MODULE/ASSY IAW AMM 49-53-08.SDR UALA2012041702305Controller · faultyINITIAL APU DUCT PRESS 18 PSI L-R. CYCLED APU OFF-ON AND TURN ON L PACK TO GET PRESS TO 30.MAINT TEXT: SUSPECT 'SURGE CONT VLV OR FLOW CONTROL MODULE' DUE TO EXTREMELY SLOW TO ACCEL DURING START. REPLACED APU FLOW SENSING MODULE. DUCT PRESS NOW NO LOAD 34, SDR UALA2012040902174Valve · faultyAPU AIR PRESS CYCLES FOR NO REASON. DEFERRED PNEUMATICS INOP PER MEL. REPLACED APU SURGE VALVE. RAN APU FOR 30 MINUTES WITH DIFFERENT LOADS. NO SURGING NOTED.SDR UALA2012020300680Bleed Valve · faultyAPU BLEED VALVE WOULD NOT OPEN. REPLACED AND OPS CHECKED THE APU BLEED VALVE PER AMM AND THE IGV ACTUATOR PER AMM. OPS CHECKED GOOD.SDR UALA2012013000608Check Valve · faultyAPU WOULD NOT START. APU BLEED STATUS THEN APU FAULT, CYCLED NO LUCK. RESTART APU IS GOOD, BUT APU BLEED AIR MSG STAY ON, AIR START. APU STILL NO HELP. DEFER PER MEL. APU ELEC SUPPLY IS GOOD, BUT AIR SUPPLY IS NOT USEABLE. RPLC'D APU CHECK VALVE PER MM. SDR ANCF2012012600110Apu · failedDURING TRANSIT CHECK STRONG ODOR DETECTED IN CABIN, VENTILATED IAW AMM 21-00-00-615-001 DECONTAMINATION OF THE ECS WAS PERFORMED. APU TOTALLY INOPERATIVE, PNEUMATIC AND ELECTRIC SYS. APU REPLACED IAW AMM 49-00-00-710-010A. OPS TEST OF THE APU SUCCESSFUL.SDR UALA2011122107049Valve · faultyAPU NO DUCT PRESSURE. CYCLED APU BLEED VALVE SEVERAL TIMES, NO HELP. REPLACED FLOW DIV VALVE PER MM. OPS APU, NO BLEED ISSUE FOUND.SDR UALA2011121406876Diverter · damagedAPU VERY WEAK--DUCT PRESSURE DOWN TO 11PSI WITH ALL PACKS ON ALSO STRUGGLED ON ENG. PERFORMED GENERAL VISUAL OF APU, INSPECTED AND REPLACED P3 AIR FILTER ELEMENT AS PRECAUTIONARY PER AMM, STILL REQUIRES FAULT TRACING PER FIM 36-10 WHEN APU CAN BE OPERATED. RSDR HALA2011121400586Bleed Valve · malfunctionedETOPS SIGNIFICANT SYS - DUE TO FLT CREW REPORTS LOW APU AIR WHEN PACKS ON. R & R APU SURGE VALVE IAW AMM TASK 49-53-01-404-010 OPS CHECK & LEAK CHECKED OK.SDR JJBA2011112200001Bleed Air Sys · odorFLIGHT CREW REPORTED ON LOG THAT THE LAVATORY SMOKE DETECTOR FLICKERED INTERMITTENTLY. MX CREW INSPECTED SMOKE DETECTOR FOUND OIL ODOR TO BE COMING FROM APU WHILE RUNNING BLEEDS. APU WAS PLACED ON THE MEL LIST AND NO OTHER DEFECTS WERE NOTED.SDR HALA2011112000532Connector · unknownETOPS SIGNIFICANT SYS - APU BLEED VALVE EICAS MESSAGE WITH APU BLEED VALVE LIGHT ON ( INTERMITTENT ) PRESSURE DROPS TO ZERO. CLEANED AND RESET CONNECTOR. OPS TESTED. COULD NOT DUPLICATE. CHECKED GOOD. OK FOR SERVICE IAW AMM 36-11-10.SDR UALA2011111506256Boot · tornFOUND APU SURGE BLEED FLEX BOOT TORN. REPLACED FLEX BOOT.SDR UALA2011110906100Module · faultyDUCT PRESSURES FROM APU ZERO WITH APU RUNNING, APU BLEED SWITCH ON, ISOLATION VALVES OPEN, AND ENGINE (BLEED) OFF LIGHTS DISPLAYED ON BOTH ENGINES. VALVE VERIFIED CLOSED. MAY NEED TO REPLACE CLAMP. IPC REF: 49-27-00A-000B ITEM 40 PCN: 651-1454. -INF- :REF ABSDR UALA2011110706038Control Valve · failedAPU PNEUMATICS FAILED TO PRESSURIZE ON ENGINE START. 4 PSI ONLY. COMPLIED WITH MEL 3611G APU BLEED VALVE LIGHT OPS NORMAL. APU SURGE CONTROL VALVE. LEAK AND OP'S CHECKED GOOD.SDR UALA2011102605805Bleed Valve · failedNO DUCT PRESSURE WITH APU ON. CYCLED CIRCUIT BREAKER AND SWITCH VARIOUS TIME, NO HELP 3 PSI ONLY. REPLACED APU BLEED VALVE. OPS CHECKED NORMAL.SDR HALA2011101600460Apu · malfunctionedETOPS SIGNIFICANT SYS - BTB - AFTER PUSHBACK APU AIR READING ONLY 10 PSI- UNABLE TO START. CYCLED APU WITH RESTART, APU AIR RETURNED TO 40 PSI HELD NORMAL. STARTED RT ENGINE AT GATE NO FAULTS, LT ENGINE START NORMAL, NO OTHER FAULTS. APU AIR OPS CHECKED OK, SDR UALA2011101005460Pressure Sensor · failedAPU FAILED TO START IN FLT. SHUTDOWN SHORTLY AFTER REACHING 100 PERCENT. DIFFERENTIAL PRESSURE SENSOR REPLACED.SDR UALA2011092305142Bleed Air Sys · malfunctionedAPU RUNNING BUT NO AIR PRESSURE. ACCOMPLISHED RESET OF APU BLEED WITH OUTBOUND FLT CREW AND ALL SYSTEMS OPS NORMAL, OK WITH FLT CREW TO CLEAR ITEM.
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