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.

SDR UALA2011090504777Seal · leakingCIDS CAUTION LIGHT ILLUMINATED. MAINT TEXT: LEFT EMERGENCY SLIDE PRESSURE LOW. UPON BOTTLE INSPECTION FOUND APU PRESSURE LEAK BLOWING DIRECTLY ON THE LEFT EMERGENCY OVERWING SLIDE INFLATION BOTTLE, HEATING IT UP TO THE POINT THAT THE GREEN SCALE WAS PEGGED Sep 2, 2011 · N426UA · Airbus A320232SDR HALA2011081900379Duct · damagedETOPS SIGNIFICANT SYS - 2 FLEXIBLE DUCT SEGMENTS ON THE APU OVER PRESSURE VENT DUCT HAVE HOLES IN THEM. R & R 2 FLEXIBLE DUCT SEGMENTS ON THE APU OVERPRESSURE VENT DUCT. OPS NORMAL IAW AMM 49-00.Aug 19, 2011 · N584HA · Boeing 7673G5SDR UALA2011072703880Module · malfunctionedAPU DOES NOT PUT OUT MORE THAN 3 PSI. WILL NOT OPEN PACK OR STARTER VALVES. NO APU PNEUMATICS SEE HISTORY. APU BLEED VALVE IS CLOSED. REPLACED FLOW SENSE MODULE OPS CHECKED OK. RAN BOTH PACKS, MOTORED BOTH ENGINES, DUCT PRESSURE READS 35 PSI.Jul 27, 2011 · N545UA · Boeing 757222SDR ASAA11510156Bleed Air Sys · malfunctionedDUAL BLEED LIGHT ILLUMINATES INTERMITTENTLY AT THE GATE. RAN APU CYCLED VALVE & RAN PACKS. OPS GOOD. OK FOR SERVICE.Jul 22, 2011 · N558AS · Boeing 737890SDR A6WA201140608Bearing · failedAT GATE, DRONING NOISE COMING FROM APU AREA. INVESTIGATED AND FOUND SMOKE IN APU ENCLOSURE. INSPECTED AFT EQUIPMENT BAY. NO EVIDENCE OF FIRE OR OVERHEATING IN WIRING. FOUND ACM NR 2 FAILED. RAN APU AND NO ABNORMAL NOISE OR ODOR NOTED. ACM NR 2 ON MEL.Jul 14, 2011 · N450AW · Cndair CL6002B19SDR UALA2011070503322Controller · faultyAPU DUCT PRESSURE LOW DURING ENGINE START. APU SWITCH PLACARDED IN FD APUC HAS AN INTERNAL FAULT. REPLACED APU CONTROLLER. ACCOMPLISHED IGV CHECK, NO FAULTS NOTED.Jul 2, 2011 · N660UA · Boeing 767322SDR ASAA1159933Bleed Air Sys · malfunctionedNO APU DUCT PRESSURE APU RUNNING NORMAL EGT 400 DEG. ACCOMPLISHED INITIAL EVALUATION & APU BITE PROCEDURES PER FIM 49 55 00 801 804 E (1) PGS 1 3 & 49 60 00 810 801 NO DEFECTS FOUND. INSPECTED BLEED AIR VALVE AREA NO LEAKS FOUND & CONNECTOR IS TIGHTENED & SEJun 27, 2011 · N532AS · Boeing 737890SDR ASAA1159916Bleed Air Sys · malfunctionedZERO DUCT PRESSURE WHEN APU BLEED SWITCH SWITCHED ON. STARTED APU AND PERFORMED BLEED AIR VALVE OPERATIONAL CHECK OPS CHECK NORMAL IAW AMM 49 52 11 400 801 STEP F APU BITE TEST SHOW NO MAINTENANCE MESSAGE THERE WAS AN INTERMITTENT FAULT OK FOR SERVICE REF FIMJun 22, 2011 · N532AS · Boeing 737890SDR ASAA1159906Sensor · failedAPU AIR SHUT OFF WITH SWITCH IN THE ON POSITION NO OTHER INDICATIONS OF ABNORMAL AIR SYSTEM. RAN APU W/ FULL LOAD ON ELEC & AIR BOTH PACKS ON. APU BLEED SW. OPS NORMAL W/ GOOD INDICATIONS. TSR ISSUED. REPLACED APU TOTAL PRESSURE SENSOR PER AMM 49 52 32 OPS Jun 20, 2011 · N566AS · Boeing 737890SDR ASAA1159893Bleed Air Sys · malfunctionedAFTER SHUTDOWN ATTEMPTED TO APPLY AIR CONDITIONING WITH APU INITIALLY. APU BLEED AIR SWITCH APPEARED NOT TO WORK. NO AIR WITH APU BLEED SWITCH ON. PERFORMED CURRENT STATES BITE NO FAULTS NOTED AND A FAULT HISTORY BITE NO FAULTS FOUND AND A MAINTENANCE HISTOJun 19, 2011 · N566AS · Boeing 737890SDR ASAA1159889Bleed Air Sys · malfunctionedSTARTED APU IN SAN ELEC OK NO AIR PRESSURE WHEN APU BLEED OPEN. PERFORMED BITE TEST ON APU REF MM 49 61 00, NO FAULTS FOUND. RESTARTED APU AND APU BLEED WORKS NORMAL REF MM 49 11 00. NO HISTORY FOR 30 DAYS, GROUND VERIFICATION SATISFACTORY OK FOR SERVICE.Jun 17, 2011 · N566AS · Boeing 737890SDR ASAA1159696Sensor · malfunctionedON CLIMBOUT APU FAULT LIGHT & MASTER CAUTION ILLUMINATED FOLLOWED QRH CONTACTED MX CONTROL & DISPATCH AGREED AFTER 5 MIN RESTART APU IF FAULT LIGHT GOES OUT. AFTER FAULT LIGHT WENT OUT RESTARTED APU, APU STARTED NORMALLY & WAS AVAILABLE. FOUND MAINT MSG 49-5May 28, 2011 · N566AS · Boeing 737890SDR ASAA1159689Unknown · malfunctionedAFTER DE-ICE CONFIGURED TO START AND HAVE NO APU AIR. TESTED APU PER AMM 49 11 00 710 801. NO FAULTS FOUND. APU AIR SUPPLY OPERATES NORMAL. THERE IS NO MAINTENANCE HISTORY WITHIN PAST 30 DAYS.May 25, 2011 · N566AS · Boeing 737890SDR ASAA1159686Sensor · faultyAPU TREND DATA CONTINUES TO REPORT CT5ATP EGT TEMPS THAT ARE HIGHER THAN EXPECTED. INSPECTED APU OIL COOLER REF M/M 49 91 41, NO FAULTS FOUND. REMOVED AND REPLACED APU INLET PRESSURE SENSOR REF M/M 49 52 31, OPS CHECKS NORMAL.May 25, 2011 · N569AS · Boeing 737890SDR HALA2011052500226Bleed Air Sys · fluctuatesETOPS SIGNIFICANT SYS - APU PRESSURE FLUCTUATES ON GROUND RESETTING BLEED SEEMS TO HELP. RECYCLED APU PNEUMATICS, PERFORM FIM 36-11-10, GROUND OPS CHECKED OK.May 25, 2011 · N580HA · Boeing 76733ASDR CALA2011052300382Duct · failedAT 10000FT ON DESCENT THE FLIGHT ATTENDANT CALLED FOR LOUD NOISE AND INSULATION BLOWING OUT NEAR 4L ROW 42. SHORTLY AFTER LOUD POP HEARD AND THE AFT CARGO FIRWE LIGHT ILLUMINATED. THE FIRE LIGHT EXTINGUISHED AFTER FIRING THE EXTINGUISHING BOTTLE. FOUND APU May 21, 2011 · N27015 · Boeing 777224SDR UALA2011052002483Valve · faultyAPU PNEUMATIC AIR WEAK, INDICATES 20 PSI WITH LOAD. SLOW ENGINE STARTS. REPLACED SURGE VALVE IN REF TO MM. GROUND CHECKS GOOD.May 19, 2011 · N666UA · Boeing 767322SDR HALA2011051900211Bleed Air Sys · erraticETOPS SIGNIFICANT SYS - APU BLEED AIR ERRATIC UPON LEFT ENGINE START. RECYCLED APU PNEUMATICS PERFORMED FIM 36-11-10. PERFORMED TEST OF SHUTOFF VALVE IAW AMM 36-11-10, GND OPS CHECKED OK.May 19, 2011 · N580HA · Boeing 76733ASDR UALA2011050202139Check Valve · malfunctionedFLIGHT CREW REPORTS "APU BLEED AIR" MESSAGE ON APU START UP. CHECK APU CHECK VALVE OPEN & CLOSE FREELY, CLEANED PRESSURE SENSOR. ERASED STATUS MESSAGE & START APU CHECK NO STATUS MESSAGE & MAINT.May 1, 2011 · N791UA · Boeing 777222SDR UALA2011050202156Control Valve · failedWEAK APU PRESS FOR ENG START. 10 PSI DURING START. CROSSBLEED START OKAY. VALVE OPENS AND CLOSES NORMAL. LOW DUCT PRESS FROM APU. INOPED PER MEL PROCEDURES. REPLACED SURGE CONTROL VALVE PER MM. OP CHECKED OKAY.Apr 29, 2011 · N598UA · Boeing 757222SDR UALA2011042802085Duct · leakingCIDS CAUTION LIGHT ILLUMINATED. SUPPLEMENTAL DATA UPDATE FOUND APU DUCT BLEED LEAK RIGHT NEXT TO THE OFFWING SLIDE INFLATION CYLINDER, CAUSING THE COMPARTMENT TO BE EXTREMELY HOT. MESSAGE SAYS EMERGENCY SLIDE PRESS LOW. REPLACED LEFT EMERGENCY ESCAPE SLIDE BOTApr 27, 2011 · N446UA · Airbus A320232SDR ASAA1159536Bleed Valve · failedDUEL BLEED LIGHT IN FLIGHT JUST BEFORE CRUISE. APU WAS OFF AND BLEED VALVE WAS OFF. STAYED ON THE WHOLE FLIGHT. DISCONNECTED APU BLEED VALVE CONNECTOR D10434 DUEL BLEED LIGHT EXTINGUISHED. PER WPM 49 52 31. REPLACED APU BLEED AIR VALVE, OPS CHECK NORMAL NApr 23, 2011 · N562AS · Boeing 737890SDR UALA2011041801891Valve · faultyWITH APU BLEED SW ON, ONLY SHOWING 10 PSI. APU BLEED VALVE MANUALLY CLOSED, BREAKERS Q22 & P11 OPEN. CHECKED OPERATION OF BLEED VLV PER MM. OPERATION GOOD NEVER HUNG UP RE-INSTALLED CONN D3576. HOOKED TESTER UP FOUND SV TM VOLT OUT OF TOL. REPLACED SURGE VApr 17, 2011 · N547UA · Boeing 757222SDR HALA2011041700162Duct · damagedETOPS SIGNIFICANT SYS - DURING APU SURGE VALVE FILTER REPLACEMENT, FOUND SURGE DUCT (FLEXIBLE) TO HAVE HOLE IN IT. REPLACED RUBBER FLEXIBLE DUCT TO APU SURGE VALVE REF AMM 49-53-01. OPS CHECK GOOD.Apr 17, 2011 · N586HA · Boeing 7673G5SDR C2XA11CL084Bleed Valve · faultyORD FLT 5876 - THE CREW REPORTED A STRONG FUEL ODOR DURING APU START. MAINTENANCE INSPECTED AND REPLACED THE APU BLEED VALVE. OPERATIONAL CHECKS WERE GOOD.Mar 27, 2011 · N12564 · Emb EMB145LRSDR ASAA1159280Unknown · malfunctionedDURING DE-ICE LOST ELECTRIC FROM APU GEN. PUT BACK ON AND WORKED NORMAL AFTER DE-ICE BLEED AIR UNAVAILABLE FOR START. SHUT DOWN APU AND INSP APU RESTART OF APU AT NORMAL OPERATIONS. BLEED AIR OPS CHECK NORMAL.Mar 17, 2011 · N593AS · Boeing 737890SDR UALA2011031101186Actuator · faultyAFTER APU SURGE VALVE REPLACEMENT, APU PNEU DURING ENGINE START MARGINAL. BEFORE START 33 PSI AND DURING ENGINE START, APU PNEU MAINTAINED APPROX 24 PSI AND MAX N2 WAS 27. AT 50 DEG F. CURRENT PNEU SUPPLY WILL PROBABLY BE WEAK IN DEN AND OKAY IN SFO. SUGGESTMar 11, 2011 · N546UA · Boeing 757222SDR UALA2011031101185Valve · faultyAPU BLEED PRESSURE LOW DURING START 20PSI. MAINT TEXT: DD OK TO USE 3611G APU BLEED VALVE INOP BUT OPB REFUSAL NAME PAT. THIS ITEM HAS HISTORY AND MX IS REQUIRED. POSSIBLE BAD SURGE VLV, IGC ACTUATOR OR APU. CORRECTED FOR EASE OF HISTORY CHECK AND FURTHER Mar 11, 2011 · N546UA · Boeing 757222SDR ASAA1159076Pressure Sensor · malfunctionedAPU LOST PNEUMATIC PRESSURE. EXAMINED APU FMC CDU FAULTS REF AMM 49 61 00 700 801. FOUND FAULT 49 52289 TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE DRIFT. REPLACED TOTAL PRESSURE SENSOR. INSTALLATION TEST PASSES. NO CURRENT FAULTS REF AMM 49 52 32/401.Feb 23, 2011 · N579AS · Boeing 737890SDR UALA2011022100861Switch · inoperativeAPU BLEED WILL NOT OPEN TO START SECOND ENGINE. UNABLE TO DUPLICATE ON ENG INE RUN AFTER RETURN TO GATE. REPLACED K495 RT BLEED AIR ENGINE START RELAY AS PRECAUTION IAW FIM FAULT CODE. ALSO NOTED DEFECT WITH APU BLEED SWITCH ON 2ND ENGINE RUN. REPLACED SWITFeb 18, 2011 · N649UA · Boeing 767322SDR ASAA1159014Bleed Valve · failedAFTER ENGINE START AND AFTER START CHECKLIST "DUAL BLEED" LIGHT REMAINED ILLUMINATED. REMOVED AND REPLACED APU BLEED CONTROL VLV GROUND TEST VERIFICATION OF APU BLEED CONTROL CHECKED NORMAL APU BITE CHECK SHOWS NO CURRENT FAILURES.Feb 9, 2011 · N583AS · Boeing 737890SDR MASA2011020801889O-Ring · leakingAPU BLEED PRODUCING STRANGE ODOR. R & R O-RING ON FUEL CONTROL ELBOW.Feb 6, 2011 · N7305V · Cndair CL6002B19SDR ASAA1158873Sensor · out of toleranceAPU BLEED AIR INOP. CDU BITE PRODUCED FAULT CODE 49 52270 DELTA PRESSURE SENSOR SHOWS OUT OF RANGE DRIFT. REPLACED THE DELTA PRESSURE SENSOR OPS CHECK GOOD NO ACTIVE FAULTS. REF MM 49 52 33. VISUAL INSPECTION COMPLETED OF CONNECTOR AND WIRE HARNESS NO FAULJan 21, 2011 · N532AS · Boeing 737890SDR ASAA1158761Unknown · malfunctionedSTARTING 1 ENGINE APU GENERATOR DROPPED OFFLINE WHEN N1 RPM AT 50 PERCENT. TRIED TO START NR 2 ENGINE COULD ONLY GET 10 PERCENT N2 DUCT PRESSURE LOW. PERFORMED APU BITE CHECK FOUND FAULT CODE 49 52289. ACCOMPLISHED FIM TASK 49 54 00 810 808 STEPS F (1). CLEJan 11, 2011 · N596AS · Boeing 737890SDR UALA2010122804749Control Valve · defectiveAPU BLEED AIR STATUS MESSAGE. MAT SHOWS MAINT MESSAGE 49-111 80 SURGE CONTROL VALVE DOES NOT FOLLOW COMMAND. PLACED DEFECT ON MEL 4952A, APU BLEED AIR SYS INOP. REPLACED SURGE CONTROL VALVE.Dec 28, 2010 · N771UA · Boeing 777222SDR UALA2010121704611Controller · faultyAPU AUTO SHUTDOWN. REPLACED APU VALVE IAW MM AND THE APU CONTROLLER, OPS CKD NORMAL.Dec 17, 2010 · N791UA · Boeing 777222SDR UALA2010121604600Check Valve · faulty3 START ATTEMPTS APU FAILED TO START. STARTED APU USING ACFT PNEUMATIC. DEFERRED ISSUE FOR FURTHER T/S IAW MEL 4942A AND COMPLIED WITH MAINT MSG 49-11290. CHECK VALVE, REF: FIM 49-52-00-810 TASK 808 "APU CHECK VALVE FAILED OPEN". REPLACED 2EA APU PNEU CLUSTEDec 16, 2010 · N778UA · Boeing 777222SDR UALA2010121404569Duct · disconnectedAPU AUTO SHUTDOWN 3 TIMES AT THE GATE. MX MESSAGE 49-10260 "APU HIGH OIL TEMP". FOUND FLEX DUCT CONNECTOR BLOWN OUT. PART ON ORDER. REPLACED BLOWN FLEX DUCT CONNECTOR. APU OPS CHECKED NORMAL.Dec 13, 2010 · N212UA · Boeing 777222SDR UALA2010121004510Check Valve · faultyAPU BLEED AIR ON STATUS.MAT SHOWS APU BLEED AIR CK VALVE LATCHED. FIM 49-52 AND PERFORM TSK 808. RPR OR RPL AS NEEDED. INCLD FNDG'S IN ACP W-U. CHK VLVE PCN: 295-1003. PT SENSOR: 295-0004 INLET PRESS SNSR: 295-0003. REPLACED CHECK VALVE. REPLACED TOTAL PRESS SDec 10, 2010 · N773UA · Boeing 777222SDR UALA2010111904284Valve · faultyAPU BLEED AIR EICAS MESSAGE. REPLACED SURGE VALVE REF AMM, RAN APU OPS CHECKED OKAY.Nov 18, 2010 · N226UA · Boeing 777222SDR C2XA10RI138Servo Valve · leakingFLIGHT 2488 - EWR - FLIGHT CREW REPORTED SMELL OF FUEL IN CABIN AND COCKPIT SURING TAKEOFF ROLL. EWR MX REMOVED AND REPLACED APU SERVO CONTROLLED BLEED AIR VALVE AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.Nov 18, 2010 · N13124 · Emb EMB145XRSDR C2XA10CL172Bleed Valve · faultyTHE CREW REPORTED A FAINT FUEL SMELL ON APU START UP. MAINTENANCE INSPECTED AND REPLACED THE APU BLEED VALVE. OPERATIONAL CHECKS WERE GOOD.Nov 15, 2010 · N13908 · Emb EMB145LRSDR RAIA201011100001Bleed Air Sys · smokeDURING TAKEOFF THE CREW REPORTED SMOKE IN THE CABIN AND IT SEEMS TO BE RELATED TO THE APU BLEED SYSTEM. MAINTENANCE INSPECTED AND DEFERED THE APU.Nov 10, 2010 · N803HK · Emb EMB145EPSDR HALA2010111000529Unknown · unknownETOPS SIGNIFICANT SYS - ON ENG SHUTDOWN, APU DUCT PRESSURE ZERO WITH APU ON. T/S IAW FIM 36-10-00, FIG 117. STARTED APU. DUCT PRESSURE AT 35 PSI. RAN BOTH PACKS. CHECKS OK. MOTORED ENGINE. CHECKS OK. CYCLED APU AIR SUPPLY VALVE SWITCH. VALVE GOES TO COMMANDENov 10, 2010 · N593HA · Boeing 76733ASDR HNAA2010110200233Bleed Air Sys · odorSTRONG ELECTRICAL ODOR IN CABIN. FOUND ODOR TO BE FROM APU BLEED. ENGINE BLEEDS NORMAL. SEQUENCE 2 FOR APU MEL. ACFT OK FOR SERVICE.Oct 29, 2010 · N942HA · Dhav DHC8102SDR HALA2010102800503Bleed Air Sys · malfunctionedETOPS SIGNIFICANT SYS - IAW FLT CREW COMMENTED APU AIR LOW DURING ENG START. PERFORMED ENG START IAW AMM 71-00-00, APU AIR IS ADEQUATE SYS OPS NORMAL.Oct 28, 2010 · N592HA · Boeing 7673CBSDR ASAA1058403Bleed Valve · faultyAPU CDU FAULT VERBAL FROM FLT CREW. CDU FAULT FIM 49 52240 SHOWING. WITH APU RUNNING SET APU BLEED SWITCH TO ON NO DUCT PRESSURE REGISTERD. CHECKED AT BLEED VALVE FOUND IN CLOSED POSITION. REPLACED BLEED VALVE REF MM 49 52 11 400 801. OPS CHECKED BLEED AIOct 18, 2010 · N589AS · Boeing 737890SDR UALA2010100103632Module · failedAPU AUTOSHUTDOWN ON TAXI OUT. APU CAME UP TO SPEED, GENERATOR CAME ON LINE THEN IT SHUTDOWN. REPLACED APU FLOW SENSING MODULE AND SURGE CONTROL VALVE IAW MM, NO HELP. FOUND BLOWN GASKET ON FLOW SENSOR REPLACE GASKET RUN APU, OPS CHECK GOOD.Sep 30, 2010 · N660UA · Boeing 767322SDR UALA2010092703574Module · faultyNO DUCT PRESSURE FROM APU. LOW AIR PRESSURE FROM APU. APU PRESSURE RETURNED TO NORMAL. REOPENED BY ORD MM FOR: LOW BLEED PRESSURE PROBLEM RETURNED. REPLACED APU AIR FLOW SENSOR MODULE. APU DUCT PRESSURE CONSTANT NOW AT 28 PSI. OPERATES BOTH PACKS AND DRY MOTSep 25, 2010 · N596UA · Boeing 757222SDR C2XA10RI124Check Valve · inoperativeFLIGHT 2094 - DTW - FLIGHT CREW ABORTED T/O DUE TO LAV SMOKE INDICATION ON T/O ROLL. MX REMOVED AND REPLACED APU BLEED AIR CHECK VALVE AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.Sep 25, 2010 · N16571 · Emb EMB145LR
Back to JASC 4950