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 UALA2009022300611Sensor · faultyAPU HAD MULTIPLE SHUTDOWNS. TOTAL PRESSURE APU PNEUMATIC CLUSTER SENSOR.SDR UALA2009031000549Valve · defectiveAPU BLEED INOP. REPLACED APU SURGE VALVE, OPS CHECKED OK. BLEED OK PSI AT ENG START RECOVERY AND PACK OPERATION NORMAL.SDR UALA2009021800549Valve · defectiveAPU BLEED INOP. REPLACED CAPU SURG VALVE, OPS CHECKED OK. BLEED OK PSI AT ENG START RECOVERY AND PACK OPERATION NORMAL.SDR CA090312014Check Valve · broken(CAN) ON TAXI OUT, AFTER BLEEDS TRANSFERRED TO APU, FLT CREW REPORTED SMOKE SMELL IN COCKPIT. PACKS SELECTED OFF AND SMOKE CLEARED. ACFT RETURNED TO GATE. MX FOUND CHECK VALVE IN LT RAM AIR DUCT BROKEN. CHECK VALVE REPLACED AND OPS CHECKED GOOD. NO SMOKE NOTESDR C2XA09IA041Bleed Valve · inoperativeIAH - FLIGHT 2099, THE CREW REPORTED THAT THE APU BLEED VALVE WAS STUCK OPEN DURING CLIMB. THE ACFT RETURNED TO IAH AND LANDED WITHOUT INCIDENT. MX R&R THE APU BLEED VALVE, OPS TESTED WITH NO DEFECTS. THE ACFT WAS APPROVED FOR RETURN TO SERVICE.SDR UALA2009031000407Module · failedDUCT PRESSURES FROM APU ZERO WITH APU RUNNING, APU BLEED SWITCH ON, ISOLATION VALVES OPEN, AND ENGINE (BLEED) OFF LIGHTS DISPLAYED ON BOTH ENGINES. REPLACED APU FLOW SENSING MODULE DUE TO FAULTS ON ECU, OPS CHECKED GOOD WITH PACKS ON & ENG MOTOR. ECU MEM CLESDR UALA2009020600407Unknown · malfunctionedDUCT PRESSURES FROM APU ZERO WITH APU RUNNING, APU BLEED SWITCH ON, ISOLATION VALVES OPEN, AND ENGINE (BLEED) OFF LIGHTS DISPLAYED ON BOTH ENGINES.SDR C2XA09IA030Unknown · odorIAH - FLIGHT 2812, THE CREW REPORTED A FUEL SMELL COMING FROM THE APU BLEED. MAINTENANCE INSPECTED THE AIRCRAFT. VERIFIED NORMAL OPERATION OF APU BLEED WITH NO SMELL NOTED, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.SDR DXTA2009013103481Water Separator · dirtyBOROSCOPE COMBUSTION SECTION FOUND IT TO BE GOOD. INSPECTED INTAKE COLD EXHAUST ALSO FOUND THEM TO BE GOOD. REMOVED OLD WATER SEPARATOR. INSTALLED NEW WATER SEPARATOR. IAW MM CH 21-51-00. RAN APEX ELS SYS IAW MM CH 21-11-00 WITH NO DEFECTS NOTED.SDR ASAA0954123Bleed Valve · malfunctionedDURING ENGINE START ENGINE NR 1 AIR PRESSURE NEVER ROSE ABOVE 15 PSI WITH STARTER ENGAGED. N2 VERY SLOW TO RISE START ABORTED GROUNDED YES. ACCOMPLISHED APU BITE PROCEDURE NO CURRENT FAULTS. STARTED APU RAN RT PACK & DRY MOTOTED NR 2 ENG APU BLEED INDICATIONSDR UALA2008121506891Valve · malfunctionedAPU STATUS MSG. REPLACED APU SURGE VALVE. APU OPS NORMAL.SDR UALA2008120806786Pressure Sensor · defectiveAPU FAILED DURING STARTING, AUTO SHUTDOWN (TWICE). REPLACED DELTA PRESSURE SENSOR, TOTAL PRESSURE SENSOR AND SURGE CONTROL VALVE. RAN APU AND DRY MOTORED ENGINE, OPS OK.SDR HNAA2008113000333Apu · odorUPON APU FAILURE, SMOKE ODOR FILLED THE CABIN AND COCKPIT. MAINTENANCE INSPECTED THE APU BAY AND FOUND NO LEAKS. APU WAS RUN FOR 10 MINUTES WITH AND WITHOUT BLEEDS ON. NO DEFECTS WERE NOTED AND NO ODORS WERE DETECTED. AIRCRAFT WAS THEN RELEASED FOR SERVICESDR DXTA200809193280Engine · leakingSTARTING THE APU WITH BLEEDS ON, SMOKE POURED OUT OF THE OVERHEAD WEMAKS AND FLOOR AREA. WITH ENGINES STARTED AND APU OFF SMOKE WAS NOT PRESENT. CONFIRMED THE APU IS THE SOURCE OF THE SMOKE. PREPARED APU TO BORESCOPE APU BORESCOPE COMPRESSOR INLET, NOTED ENSDR UALA2009081002413Shutoff Valve · faultyAPU BLEED VALVE WON'T OPEN. REMOVED AND REPLACED APU SHUTOFF VALVE. OPS AND LEAK CHECKED GOOD.SDR MASA200800419Packing · defectiveASH FLT 2781 BFL- OVERNIGHT. FUEL ODOR IN CABIN WITH PACKS ON APU BLEED. REMOVED AND REPLACED PACKING AND FUEL FEED WIGGINS FITTING.SDR FDKA200803140O-Ring · damagedFDM 6133 CVG-SDF (0749 PHX LCL). FUEL SMELL IN CABIN FROM APU BLEED. MX REMOVED AND REPLACED O-RINGS ON SOLENOID.SDR C2XA08CL037Bleed Valve · faultyCLE FLIGHT 2890 - THE CREW REPORTED A FUEL SMELL WHEN THE PACKS WERE OPERATING FROM THE APU. MAINTENANCE INSPECTED AND REPLACED THE APU BLEED VALVE. OPERATIONAL CHECKS WERE GOOD.SDR ASAA0852542Bleed Valve · faultyTHE "DUAL BLEED" LIGHT ILLUMINATED OUT OF 13000'. FLICKERED ON & OFF. ON FINAL APPROACH REMAINED ILLUMINATED UNTIL REACHING THE GATE. MASTER CAUTION FLICKERED BUT RT SIX PACK DID NOT ILLUMINATE. FOLLOWED FIM 49 51 TASK 801. REPLACED BLEED AIR VALVE. ACCOSDR HALA0800023Isolation Valve · openETOPS SIGNIFICANT SYSTEM, NO APU BLEED AIR APU RUNS OK. OPERATED APU AIR. NO FAULTS NOTED. BLEED AIR PRESS NORMAL. OK FOR SERVICE. FOUND ISOLATION VALVE OPEN ON ARRIVAL.SDR SIMA200801401Apu · smokeON FLIGHT 4362 - AFTER SHUTDOWN AT THE GATE AND WITH THE APU AND NUMBER 2 PACK RUNNING, A/C CABIN AND COCKPIT FILLED WITH SMOKE. APU AUTO SHUTDOWN. AIRCRAFT REMOVED FROM SERVICE ISSUED MEL 49-1. REMOVED AND REPLACED APU AIRCRAFT RETURNED TO SERVICE.SDR C2XA08IA005Bleed Valve · faultyIAH - FLIGHT 2025, THE CREW REPORTED THAT THE APU CAUSES FUEL SMELL IN THE CABIN. MAINTENANCE PLACED THE APU ON MEL49-00-00 CTL 136251, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. MAINTENANCE R &R THE APU SERVO BLEED VALVE, OPERATIONALLY CHECKED WSDR QXEA200701730Housing · chafedC4 PDX - APU FLOW CONTROL SOV HOUSING IS CHAFING AGAINST TOP OF FRAME AT STATION 920.916 ON VERTICAL WEB AT 11:00 POSITION ON FORWARD SIDE. REPAIRED IAW SRM 51-14-00, RD8/4-55-358.SDR UPS07650417Module · malfunctionedINSPECTION TYPE:ETOP APU BLEED INOP DEFERRED M 356254. T/S PER FIM APU BITE SHOWED PT SENSOR WITH MINIFLAG 14. REMOVED AND REPLACED FLOW SENSING MODULE PER MM 49-53-08-4. OPS AND BITE CHECK GOOD. THIS CLEARS M356254.SDR UPS07650415Bleed Air Sys · inoperativeINSPECTION TYPE:ETOP NO APU BLEED AIR. BTB FOR EXTERNAL AIR CART. C/O OPERATIONAL TEST OF APU BLEED AIR IAW AMM 49-52-00-00. FOUND SATISFACTORY.SDR C2XA07RI053Apu · malfunctionedFLT 2445 - EWR - CREW REPORTED APU BLEED PRODUCING SMOKE IN CABIN AND COCKPIT. EWR MX PERFORMED OPERATIONAL CHECK AND COULD NOT DUPLICATE THE PROBLEM. ACFT WAS APPROVED TO RETURN TO SERVICE.SDR DL76L070595Valve · unserviceableA/C RTN TO STAND LOW AIR PRESS FROM APU ENG WOULD NOT START APU AIR SUPPLY INOP MCO/PLACARD, INSTALLED PER MEL 49-11-01C. FOUND SURGE BLEED VLV STUCK IN OPEN POSITION CHANGED SAME, OP NOW NORMAL.SDR MWEA070099B-Nut · looseWITH BOTH ENGINES OFF APU ON, WITH AIR SELECTED ON WITH RIGHT PACK, CABIN GOT A OIL SMELL & HAZE. TIGHTENED B-NUT ON PRESSURE LINE, LEAK CHECKED GOOD.SDR QXEA200700591Valve · malfunctionedSEA- FLIGHT 2531 - AFTER ENGINE START RECEIVED A APU BLEED CAUTION MESSAGE. RETURNED TO THE GATE. MAINTENANCE FOUND CODE MPE 46 IN THE MDC. REPLACED THE LOAD CONTROL VALVE IAW CRJ-700 AMM 49-51-05-000-801-A01. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SSDR A6W2007F00000Duct · crackedINSPECTED APU AND FOUND UPPER AND LOWER INTAKE DUCTS CRACKED BEYOND LIMITS IAW AMM 49-14-01. REMOVED AND REPLACED UPPER AND LOWER APU INTAKE DUCTS. OPERATIONAL CHECK GOOD IAW 49-52-01. UPPER DUCT, TSN 7728, LOWER DUCT, TSN 11740. (K)SDR DL764070199Bleed Valve · inoperativeAPU BLEED VALVE WILL NOT OPEN. REPLACED APU BLEED VLV PER MM 36-11-10-404-014. LEAK CKS GOOD.SDR RAIA00702038Bleed Air Sys · unknownFLT NR 7986 - IAD - ENGINE WON'T START OFF APU BLEED. MAINTENANCE DEFERRED APU BLEED PER MEL.SDR A6WA200740081Duct · crackedINSPECTED APU AND FOUND UPPER AND LOWER INTAKE DUCTS CRACKED BEYOND LIMITS IAW AMM 49-14-01. REMOVED AND REPLACED UPPER AND LOWER APU INTAKE DUCTS. OPERATIONAL CHECK GOOD IAW 49-52-01. UPPER DUCT TSN = 7728, LOWER DUCT TSN = 11740.SDR C2XA07CL022Bleed Valve · faultyCLE FLIGHT 2212 THE CREW REPORTED AFTER STARTING THE APU THERE WAS A STRONG FUEL SMELL. MAINTENANCE INSPECTED AND REPLACED THE APU BLEED VALVE. OPERATIONAL CHECKS WERE GOOD.SDR HNAA0700040Bleed Air Sys · odorSTRONG OIL SMELL IN FLIGHT DECK WITH APU BLEED ON. RAN APU OPERATED BLEEDS FOR SEVERAL MINUTES, NO SMELL DETECTED.SDR HALA0700040Bleed Valve · malfunctionedBTB - NO AIR ON APU ON START. PERFORMED APU RTS TEST FAILED BLEED CONTROL VALVE OPEN CIRCUIT FAULT. PERFORMED FIM 49-50-00-810-804 REF WDM 49-30-004. PERFORMED REPAIR CONFIRMATION RTS PASSED.SDR C2XA07BT008Bleed Valve · faultyEWR LOG SQUAWK STRONG FUEL ODOR IN COCKPIT DURING TAKEOFF. FOUND WINDSHIELD HEAT NR 2 CONTROLLER POWER TERMINALS MELTED. REMOVED AND REPLACED WINDSHIELD HEAT CONTROLLER NR 2 IAW EMB145 AMM 30-42-01 AND REPAIRED WIRE TERMINAL TO CONTROLLER IAW EMB145 AMM 20-2SDR C2XA07CL001Bleed Valve · stickingCLE FLIGHT 2837 THE CREW REPORTED THE APU CAUSES A SMELL IN THE CABIN. MAINTENANCE INSPECTED AND REPLACED THE APU BLEED VALVE. OPERATIONAL CHECKS WERE GOOD.SDR SWIA200617498Unknown · smokeAPU BLEED GENERATED SMOKE IN CABIN. UNABLE TO DUPLICATE SMOKE OR SMELL AFTER OPERATING BOTH PACKS WITH APU BLEED. OPERATIONAL CHECKS GOOD.SDR DL764061048Bleed Air Sys · malfunctionedAPU AIR INOP FOR ENGINE START, RTB TO RESTART APU. CONNECTED GROUND PWR. CYCLED SWITCHES, RESTARTED APU, OPS NORMAL.SDR SWIA200617429Flow Divider · odorAFTER STARTING APU ON THE GROUND, NOTICED STRONG FUEL SMELL IN THE AIRCRAFT. REMOVED AND REPLACED APU FLOW DIVIDER IAW ALLIED SIGNAL MM 49-30-58. OPERATIONAL CHECKS GOOD.SDR HALA0600896Duct · splitETOPS SIGNIFICANT SYSTEM, DURING OVERNIGHT INSPECTION OF APU, FOUND APU BLEED AIR T DUCT SPLIT AT T. UNABLE TO OPERATE APU IN THIS CONDITION. REPLACED APU BLEED AIR DUCT T PER AMM PNEU LEAK CKS OK.SDR HALA0600860Actuator · malfunctionedON OVERNIGHT CHECK, FOUND APU DUCT PRESSURE LOW 10 PSI. TS PER FIM, FOUND ECU FAULTING IGV ACTUATOR. REMOVED AND REPLACED IGV ACTUATOR. OPS CHECKED APU PNEUMATICS ALL CHECK NML. OK FOR SERVICESDR HALA0600832Cylinder · leakingETOPS SIGNIFICANT SYSTEM, APU VARIABLE VOLUME CHAMBER CYLINDER HAS AIR LEAKING FROM ATTACH POINT GASKET. REMOVED AND REPLACED GASKET VOLUME CHAMBER CYLINDER. RAN APU AIR LEAK CHK OK.SDR HALA0600803Bleed Valve · failedBTB: APU VALVE DISAGREE LEVEL 1 ALERT CAME ON AFTER SHUTTING DOWN APU ON TAXI OUT. REPLACED APU BLEED AIR VALVE PER AMM 36-16-02.SDR DL76G060733Control Valve · failedAFTER PUSHBACK IN ATL AFTER FIRST ENG START AND SELECTING SECOND PACK TO OFF THE APU SHUTDOWN W/APU FAULT MSG DISPLAYED. BITE CHECK OF APU ECU FAULTS REVERSE FLOW. FWD APU BLEED AIR TO MCO/PLAC PER MEL 49-11-01C. T/S PER FIM. REMOVED AND REPLACED APU SURGESDR DXTA200601569Control Valve · inoperativeDURING POWER UP ON TAKEOFF ROLL, BOTH CREW MEMBERS NOTICED A LOUD AIR FLOW FROM THE VENTS AND REJECTED TAKEOFF. APU BLEED AIR FLOW CONTROL VALVE REPLACED + TESTED SERVICEABLE IAW C-560XL MM CH 36-12-00.SDR 200607182Duct · contaminatedON TAXI IN, AFTER LANDING, THE CREW STARTED THE APU WITH A WAIT OF APPROX 2 MINUTES BEFORE MARSHALLER CAME TO THE GATE. DURING THIS TIME THEY RECEIVED A LAV SMOKE EICAS/BELL. THE A FA CALLED UP AND CONFIRMED IT AND INDICATED SHE CHECKED AND THERE WAS NO FIRESDR DL764060493Unknown · malfunctionedAPU AIR INOP FOR ENG START. RESTORED SHUT OFF VLV TO NORMAL. MANUALLY OPENED APU SHUT OF VLV, APU SHOT OFF VLV OPS NORMAL. PACK OPS NORMAL, DRY MOTOR ENGINES NO PROBLEMS. APU SHUT OFF WAS CYCLED APPROX 15 TIMES, NO DEFECTS NOTED. ASCTU BITE HAS NO CURRENTSDR HALA0600449Apu · malfunctionedETOPS SIGNIFICANT SYSTEM - APU AIR TOO LOW FOR ENGINE START. OK TO CONTINUE PER C 49-11-1-1.
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