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 C2XA10CL149Bleed Valve · faultyTHE CREW REPORTED A FUEL SMELL WHEN THE APU WAS STARTED. MAINTENANCE INSPECTED AND REPLACED THE APU BLEED VALVE. OPERATIONAL CHECKS WERE GOOD.SDR HALA2010090400399Duct · crackedFOUND FLANGE CRACKED ON APU BLEED AIR DUCT. PN S355 T310-1, R & R DUCT ASSY PN S355T310-1 OP PN 14J44-1 LK CK GOOD PN: 14J44-1 SN ON: 5A930103 SN OFF: 06850887.SDR UALA2010090303261Valve · faultyINSUFFICIENT APU BLEED PRESSURE TO START ENGINES ONLY 15 PSI. REPLACED APU SHUTOFF VALVE (PN 2790598-101 - SN 146), NO HELP. REPLACED FLOW SENSING MODULE, NO HELP. REPLACED APU SURGE VALVE. APU BLEED PRESSURE NORMAL.SDR ASAA1058241Bleed Air Sys · malfunctionedNO APU AIR NO DUCT PRESS NO DUAL BLEED. RESTARTED APU VERIFIED GROUND OPS NORMAL BITE CHECK CDU NO CURRENT STATUS FAULT.SDR 2010FA0000834Duct · damagedDURING POST FLIGHT INSP WITH THE APU RUNNING AND BLEED AIR SELECTED ON, IT WAS NOTED THAT THERE WAS A HOLE IN THE INSULATION OF THE APU AND GROUND START DUCT, AND BLEED AIR FELT TO BE ESCAPING. FURTHER INVESTIGATION FOUND THAT A TWO (2) INCH CRACK HAD DEVELOPSDR CALA2010080900385Tube · damagedWHILE PERFORMING FIM TASK 21-00-00 FOR OIL FUMES IN CABIN, FOUND BUFFER AIR SUPPLY TUBE DAMAGED, BOTH TUBE AND FITTING ARE ORDERED FROM AOG. OK TO CONTINUE, ITEM PLACED ON MEL PER MX CONTROL. REQUIRES P/N S 361890-2 TUBE, MS9386-109 PACKING, 3618088-1 FITTINSDR UALA2010071302496Shutoff Valve · faultyON ENG START GOT EICAS ENG AUTO START L&R MESSAGE. APU BLEED STATUS MESSEGE. DEFERED APU BLEED VALVE, MM SG 49-10990 REF FIM. IF NECESSARY WILL REPLACE IGVA. REPLACED APU BLEED SHUTOFF VALVE, VALVE BAD FROM STOCK. IT WOULD NOT CLOSE WHEN BLEED SWITCH SHUTOFF.SDR C2XA10CL097Bleed Valve · faultyFLT 5779 THE CREW REPORTED A FUEL SMELL IN THE CABIN WITH THE APU RUNNING. MAINTENANCE INSPECTED AND REPLACED THE APU BLEED VALVE. OPERATIONAL CHECKS WERE GOOD.SDR QXEA2010060800336Unknown · odorAPU BLEED AIR SMELLS LIKE ROTTEN EGGS. ENGINE BLEED AIR SMELLS OK. RAN APU WITH BLEED AIR ON FOR 10 MIN. NO FOUL ODORS NOTICED. INSPECTED APU FOR OIL LEAKS NONE NOTED. PURGED ECS SYS AS A PRECAUTIONARY MEASURE USING APU IAW DH8-400-SL-21-012A SET UP AND PSDR HALA2010051700215Pneumatic System · malfunctionedETOPS SIGNIFICANT SYS - AFTER LANDING UNABLE TO GET PNUEMATIC AIR FROM APU. PROVIDED GROUND AIR & GROUND POWER. POWERED DOWN ACFT. SHUTDOWN APU & RESTARTED APU. TURNED ON ELECTRICAL & PNUEMATIC SYSTEMS IAW AMM 49-11-00-802-002. STANDARD PROCEDURES ALL APU ELSDR MYWA100071Bleed Air Sys · malfunctionedETOPS SIGNIFICANT SYSTEM - NO BLEED AIR FROM APU.SDR C2XA10R056Servo Valve · defectiveFLIGHT 2610 - EWR - FLIGHT CREW REPORTED STRONG SMELL OF FUEL IN THE AIR DURING TAKEOFF IN COCKPIT ONLY. EWR MX REMOVED AND REPLACED APU SERVO CONTROLLED BLEED VALVE AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.SDR UALA2010042601385Isolation Valve · faultyAPU BLEED ISOLATION VALVE FAILED AT DEPARTURE. REPLACED FAULTY APU SURGE CONTROL VALVE. CKS GOOD, NO MSG DISPLAYED.SDR CWQA04142010Duct · contaminatedREJECTED TAKEOFF DUE ANTI-ICE FLUID IN APU DUCTS CAUSING SMOKE IN PLANE. RAN ENGINES AT N1 FOR THE DAY TO CLEAR ANY ANTI-ICE FLUID. OPS CHECK GOOD. AIRCRAFT WAS DE-ICED PRIOR AND EMERGENCY EQUIP WAS REQUESTED AFTER EVENT.SDR ASAA1057664Bleed Valve · defectiveFOUND APU/ CDU "CURRENT STATUS" FAULT49 52240 "HI CURRENT FLOW TO BLEED VALVE" + 25 PAST FLIGHT " OTHER OCCURRENCES" HISTORY. FOUND PIN 1 & 2 TO READ 6 OHMS INSTEAD OF GREATER THAN 20 OHMS PER FIM 49 51 00 AT BLEED AIR VALVE. CHANGED APU BLEED AIR VALVE REF:SDR ASAA1057662Bleed Air Sys · unknownDEAL BLEED LIGHT ILLUMINATED OFF & ON W/ APU BLEED ON & PACKS IN AUTO W/ ISO VALVE OPEN OR CLOSED. PERFORMED FIM TASK 49 55 00 810 806 CYC BLEED AND PACK SWITCHES SYS RETURNED TO NORMAL OPERATION. NO HISTORY PAST 30 DAYS, OK FOR SERVICE. SEAMC NOTIFIED.SDR ASAA1057657Bleed Air Sys · unknownDURING ENGINE NR 1 START OBSERVED NO N2 ROTATION AND DUCT PRESSURE 0. PERFORMED QRH PROCEDURE. ALSO OBSERVED THE APU DUAL BLEED LIGHT TO BE FLICKERING ON AND OFF. ONCE ENGINE STARTED SWITCH WAS DISENGAGED DUCT PRESSURE RETURNED TO NORMAL. HOWEVER DUAL BLEESDR UALA2010032200954Controller · faultyNO PNEUMATIC PRESSURE WITH APU RUNNING AND VALVE OPEN. APU BLEED VALVE OPENS AND CLOSES NORMALLY. REPLACED APU CONTROLLER. CHECKS GOOD.SDR UALA2010031500872Valve · malfunctionedAPU BLEED DOES NOT INCRS FOR ENG START. MAX BLEED PRESS 15 PSI. ENG MAX MOTOR 20PCT N2. WITH PACKS OFF, MOTORED ENG, REACHED 22 PERCENT N2, 20 PSI DUCT PRESSURE REACHED. REPLACED APU FLOW SENSING MODULE, NO HELP. REPLACED SURGE VALVE DUCT PRESS 32 PSI UNLSDR FDKA2010031300041Bleed Valve · faultyFUEL SMELL IN AC AFTER T/O. PLACED ON MEL. R2 APU BLEED VALVE, OPS GOOD CLEARED MEL.SDR UALA2010031500871Actuator · malfunctionedENGINES STARTED NORMALLY IN DEN HOWEVER APU DUCT PRESSURE WAS 18 PSI. ACTUATOR FOUND FAULTY. REPLACED APU INLET GUIDE ACTUATOR. OPS NORMAL.SDR UALA2010031200843Module · failedAPU PNEUMATICS LOW READS APPROX 19 PSI ALONG WITH FLUCTUATING PRESSURE. REPLACED FLOW SENSING MODULE. REPLACED APU SURGE CONTROL VALVE. TESTED APU. OPS CHECKS NORMALLY.SDR UALA2010021500573Line · leakingON WALK AROUND NOTED LOUD NOISE COMING FROM APU AREA SUSPECT AIR LEAK AT PNEUMATICS BLEED VALVE. SHUTOFF OFF APU BLEED NOISE STOPPED. SECURED CLAMP FURTHER TROUBLESHOOTING FOUND POTABLE WATER PRESSURIZATION LINE BROKEN FROM APU PNEU DUCT BULK PIT LT AFT SIDESDR UALA2010020800502Control Valve · faultyAPU BLEED READING BETWEEN 12 18 PSI. APU BLEED INOPERATIVE. REPLACED SURGE CONTROL VALVE.SDR UALA2010011100125Bleed Valve · faultyAPU BLEED BLEED AIR ON WITH SWITCH OFF. APU VALVE LOCK CLOSED. SUSPECT THE APU BLEED SWITCH AT FAULT. REPLACED VALVE, OPS TEST NORMAL.SDR UALA2010010700087Shutoff Valve · failedAPU BLD AIR DUCT PRESS LO APPROX 18 PSI FOR LT ENGINE START. PROBLEM RELATED TO LOW PNEUMATIC DUCT PRESSURE. NR 1 ENGINE PRSOV WOULD NOT CLOSE. REPLACED PRSOV AND APU PNEUMATICS OP CHECK OK.SDR USAA2009122893435Actuator · inoperativeFLT 450 - MCO-PHX - EMERGENCY LANDING - APU AUTO SHUTDOWN IN FLIGHT. DIVERTED TO ATL APU OPERATED NORMALLY FOR DURATION OF FLIGHT. REMOVED AND REPLACED APU IGV ACTUATOR. OPERATIONAL CHECK WAS GOOD.SDR DL764092024Bleed Valve · inoperativeAPU BLEED VALVE INOP. SHUT APU DOWN. RESTARTED OPS NML. ACFT OK FOR SVC AT THIS TIME. ETOPS CATEGORY 'E': PROBLEMS WITH SYS CRITICAL TO ETOPS.SDR UALA2009121503884Valve · malfunctionedAPU BLEED AIR MSG. REPLACED SURGE VALVE. OPS NORMAL.SDR FDKA2009120700206Bleed Air Sys · malfunctionedFRL FLT 6140 BDL - CVG. FUEL SMELL PRESENT IN COCKPIT AND CABIN WHEN APU IS RUNNING. MX DEFERRED THE APU BLEED SYSTEM. NO FUEL LEAK NOTED.SDR MYWA09066Bleed Valve · defectiveETOPS SIGNIFICANT SYSTEM - APU DUCT PRESSURE INSUFFICIENT TO START ENGINE.SDR UALA2009101203210Valve · faultyCREW REPORTS APU DUCT PRESS DROPS TO BELOW 10 PSI ON NR 2 ENG START. REPLACED APU SURGE VALVE. OPS CHECK OKAY.SDR UALA2009100803158Bleed Valve · malfunctionedSTATUS MESSAGE BLEED VALVE APU DISPLAYED DURING CRUISE. REPLACED APU BLEED VALVE AND RESET ASPL CONTROLLER, MSG CLEARED.SDR SWAA096419Check Valve · faultyDECLARED EMERGENCY, AT 36,000 FT AIRCRAFT SLOWLY LOST PRESSURIZATION. NO LIGHT ON PRESS PANEL, OUTFLOW VALVE WAS FULLY CLOSED. PRESSURIZATION WAS REGAINED AT APPROX 14,000 FT IN DESCENT. NO POPS OR BANGS WERE NOTED. REMOVED AND REPLACED APU BLEED AIR CHECKSDR SWAA096393ACheck Valve · faultyDECLARED EMERGENCY - AT 36,000 FT AIRCRAFT SLOWLY LOST PRESSURIZATION. NO LIGHT ON PRESS PANEL, OUTFLOW VALVE WAS FULLY CLOSED. PRESSURIZATION WAS REGAINED AT APPROX 14,000 FT IN DESCENT. NO POPS OR BANGS WERE NOTED. REMOVED AND REPLACED APU BLEED AIR CHECSDR DL75E091567Valve · malfunctionedAPU SHUTDOWN ON SECOND ENGINE START ATTEMPT. APU FAULT LIGHT DISPLAYED. FOUND APU SURGE VALVE DUCT BOOT WITH HOLE. PERFORMED BITE ON APU ECU FAULTED REVERSE FLOW. REPLACED SURGE VALVE AND RUBBER BOOT. APU CHECKS NORMAL. ETOPS CATEGORY 'E': PROBLEMS WITHSDR UALA2009091102875Shutoff Valve · malfunctionedBLEED VALVE APU APU BLEED VALVE DISAGREES WITH COMMANDED POSITION. STATUS MSG-3610130 LATCHD DC MODE MSG-3610130 ACTIVE DC MODE. MSG NBR 36-10130. RPL'D APU S-OFF VLV AND TEST PASSED. BUT MSG NOT GONE. CLN'D CONNECTOR, ACPD FIM 36-12(806) NO HELP. MAT TESDR USAA2009080391978Unknown · odorFLT 154 - PHL - ODOR - AFTER T/O SMELLED FUEL COMING THRU VENT. SHUT DOWN APU (DID BLEEDS OFF T/O) AND SMELL WENT AWAY. MAINTENANCE RAN APU WITH BLEED ON - NO SMELL NOTED. NO LEAKS NOTED AND NO SUBSEQUENT EVENTS.SDR UALA2009071302058Shutoff Valve · stuckEICAS MSG 'APU BLEED VAL' DISPLAYED. APU BLEED AIR VALVE LIGHT ON. DUCT PRESSURE WAS ZERO. APU BLEED AIR VALVE LOCKED IN THE CLOSED POSITION. REPLACED APU SHUT-OFF VALVE. OPS CHECKED VALVE BY CYCLE OPEN AND CLOSE A COUPLE OF TIMES AND DRY MOTOR AN ENGINE.SDR DL76L090936Valve · malfunctionedON PUSH BACK APU QUIT RETURNED TO GATE APU AUTO SHUTDOWN. IAW QRH SWITCH OFF TO ON. FAULT LIGHT EXTINGUISHED. APU STARTED NORMALLY. ECB BITE SHOWS NO FAULTS. APU STARTED TWICE SUCCESSFULLY AND RUNNING WITH LOADS NORMALLY. ETOPS CATEGORY 'E': PROBLEMS WITH SSDR CA090616002Apu · smoke(CAN) FLT NR 2455, DURING TAXI OUT, FLT CREW REPORTED SMOKE IN THE CABIN WHEN THE APU BLEED WAS SELECTED. ACFT RETURNED TO GATE. MX REMOVED AND REPLACED APU ASSY IAW AMM.SDR DL76L090842Control Valve · malfunctionedUPON PUSHBACK AND SELECTING PACKS TO OFF, THE APU STOPPED RUNNING. RETRY SAME RESULT BITE CHKD APU CONTROL MODULE. FAULTED SURGE CONTROL VALVE. REMOVED AND REPLACED SURGE CONT VALVE PER MM OPS CHKS NORMAL.SDR DL76G090841Control Valve · malfunctionedAPU AUTO SHUTDOWN WITH FAULT LIGHT WHEN 2 PACK WAS TURNED OFF FOR ENG START. HAPPENED TWICE ONLY FAULT FLAG FOR APU THERMOCOUPLE. STARTED APU AND RAN 15 MINS FULLY LOADED. TEMP WAS WITHIN LIMITS. TRIED SHUTTING DOWN PACKS AND GOT AUTO SHUTDOWN REV FLOW. RSDR FDEA200904241399Duct · contaminatedSMOKE IN COCKPIT ON GROUND AFTER AIR COND PACK TURNED ON. ACFT RELEASED FOR SERVICE PER MEL/CDL: 49-10-01. SMOKE WAS NOTED DURING FIRST PACK OPERATION FOLLOWING COMPRESSOR WASH OF THE NR 2 ENGINE, SUSPECT WATER FROM WASH IN BLEED DUCT. OPERATED APU PER JRHSDR HALA2009042000158Duct · looseETOPS SIGNIFICANT SYSTEM, APU BLEED AIR DUCT SEPARATING FROM APU, BOLTS BACKING OUT. REMOVED TEE DUCT. REPLACED INSERTS REINSTALLED TEE DUCT, OPERATION AND LEAK CHECK OF APU DUCT GOOD. OK TO CONTINUE.SDR DL76G090630Ecu · failedDURING ENGINE START AFTER BOTH PACKS TURNED OFF THE APU SHUTDOWN WITH A FAULT LIGHT. ECU MINI FLAGS WERE 12-37-43. FWD APU PNEUMATICS FUNCTION TO MEL 49-11-01C. MCO/PLAC INSTALLED. OPS CHKD APU ON ARRIVAL OPERATES OK DID BITE CHK SHOWS REPLACED ECU. ECU SDR UALA2009040600985Module · faultyTWO MINUTES AFTER DEPARTURE TIME CREW REPORTED APU QUIT. REPLACED FLOW SENSING MODULE, OPS NORMAL.SDR UALA2009040400960Valve · faultyDUCT PRESS DROPS WHEN USING APU BLEED AIR FOR ENGINE START OR PACK OPERATION. DUCT PRESSURE DROPS TO. DUCT PRESS DROPS 11-15 PSI DURING ENGINE START. NO LOAD DUCT PRESS 25 PSI. REPLACED SURGE VALVE & BLEED VALVE.SDR ASAA0954827Bleed Air Sys · malfunctionedUPON APU START AND SELECTION OF APU BLEED AIR ONLY RECEIVED 2 PSI ON DUCT PRESSURE GAUGE (OUTSIDE AIR TEMP 32 DEG AND SNOWING). ACCOMPLISHED FIM TASK 49 55 00 810 804 INITIAL EVALUATION CHECKED NORMAL. ACCOMPLISHED APU BITE PROCEDURE PER 49 60 TASK 801, NO FSDR DL76G090387Control Valve · slowAPU SHUTDOWN ON PUSHBACK WITH FAULT LIGHT. ECU FAULTED REV FLOW. REPLACED SURGE CONTROL VALVE. CKS GOOD MFG P/N 979806-12.
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