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 CALA2013123194060Sensor · faultyAPU IS A NO START. REPLACED TOTAL PRESS SENSOR IAW AMM 49-53-02 DUE TO MX MESSAGE 49-11290. INSTALLATION NEEDS TEST IAW AMM 49-53-02 3G3 PG 405.SDR HALA2013122000180Pressure Switch · malfunctionedAFTER TAKEOFF, APU FAULT LIGHT ILLUMINATED, APU SHUTDOWN, COMPLIED WITH QRH PROCEDURE. APU WOULD NOT RESTART. R & R APU GEN OIL PRESSURE DIFFERENTAL PRESSURE SWITCH IAW AMM 49-27-16. OPS, LEAK AND SECURITY CHECK GOOD. OK FOR SERVICE. PLACARD REMOVED, MIC SDR CALA2013122093833Bleed Valve · malfunctionedAPU BLEED VLV CYCLES CLOSED UNCOMMANDED.SDR CA140124024Apu · malfunctioned(CAN) CABIN FILLED WITH SMOKE ON SELECTION OF APU BLEED, APU BEING INSPECTED & MADE INOPERATIVE. ENGINE RUN REQUIRED TO PURGE ECS AI.SDR HNAA2013120900610Bleed Air Sys · hazeAPU BLEED SELECTED, FLIGHT DECK FILLED WITH BLUE HAZE. MAINTENANCE ISOLATED TO APU BLEED.SDR HNAA2013120600600Bleed Air Sys · hazeLIGHT SMOKEY HAZE IN ACFT WITH APU BLEED SELECTED. GROUND RAN ACFT. CONFIRMED HAZE TO BE PRODUCT OF APU BLEED. ENGINE BLEEDS CHECKED GOOD.SDR CALA2013121893782O-Ring · wornAPU ALTITUDE NO START, COLD SOAK. APU SHUTDOWN AFTER REACHING 95% SPEED AFTER 10 SECONDS. REACHES 100 O-O THEN SHUTS DOWN FL330 ACCOMPLISHED FIM 49-53-TA SK 804, APU STARTED WITH NO FAULTS. FOUND STATIC PRESSURE LINE O RING WORN IAW IPC 49-53-53 ITEM 136. SDR CALA2013120693526Shutoff Valve · inoperativeAPU BLEED INOPERATIVE. REPLACED APU SOV IAW AMM.SDR CALA2013120493455Filter · defectiveAPU BLEED AIR SURGES. REPLACED APU SURGE VLV ELEMENT FILTER IAW AMM, OPERATIONS CHECKED NORMAL.SDR CALA2013121993818Bleed Air Sys · malfunctionedAPU SOV INOPERATIVE. APU BLEED STOPPED WORKING NOT SURE OF SOURCE OR BLEED LEAK. PERFORMED APU PERFORMANCE CHECK, NO FAULT FOUND & PERFORMANCE CHECKED NORMAL IAW DIS 245.SDR CALA2013120293355Bleed Air Sys · inoperativeAPU BLEED STOPPED WORKING NOT SURE OF SOURCE OR BLEED LEAK.SDR CALA2013120593470Cooling Fan · faultyOIL SMELL IN CABIN IAW TSM 49-00-00-810-921-A12, FOUND OIL CONTAMINATION IN APU PMG & COOLING FAN ASSEMBLY. REPLACED APU PMG & COOLING FAN ASSEMBLY IAW MM.SDR HNAA2013112500591Bleed Air Sys · smokeAPU BLEED AIR CAUSED SMOKE IN CABIN, CLEARED WHEN APU BLEED SELECTED OFF. NO SMOKE OFF ENGINE BLEEDS. APU BLEED AIR.SDR UIEA2013102400536Module · leakingBLEED AIR LEAK ON FLOW SENSING MODULE (APU)(CLEANED AND INSTALLED GASKET BETWEEN FLOW SENSING MODULE AND MOUNT HOUSING, IAW AMM 49-53-08. NO LEAKS NOTED AT THIS TIME AND APU FLOW SENSING MODULE.)SDR UIEA2013102100532Module · looseAPU BLEED AIR LOW PRESSURE IN ALL MODES (DUCT PRESSURE) ON GROUND. PRESSURE LOW WITH APU AS THE AIR SOURCE. TIGHTEN BOLTS ON FLOW SENSING MODULE IAW AMM 49-53-05, DUCT PRESSURE. OPS CK NORMAL, REF FIM 49-11, TREE 980, BLK 51.SDR CALA2013101692116Guide Vane · faultyDUCT PRESSURE DROPS WHEN USING APU BLEED AIR FOR START OR PACK OPERATIONS. 15 PSI R & R INLET GUIDE VANE ACTUATOR IAW AMM, NO HELP. IGV REPLACED, OPERATIONS CHECKED GOOD AT THIS TIME IAW AMM.SDR CALA2013100891842Valve · blownAPU SURGE VALVE HAS DUCT THAT IS BLOWN.. REPLACED SURGE VALVE & DUCT. APU OPERATION NORMAL.SDR CALA2013100791791Pressure Sensor · faultyAPU AUTO SHUTDOWN AFTER ENGINE START. REPLACED APU CHECK VALUE DIFFERENTIAL PRESSURE SENSOR & SURGE CONTROL VALVE IAW AMM, OPERATIONS CHECKED NORMAL. RAN BOTH ENGINES, APU OPERATIONS NORMAL.SDR CALA2013093091562Valve · faultyAPU SHUTDOWN DURING ENGINE START ACCOMPANIED BY FAULT LIGHT. REPLACED APU SURGE VALVE IAW AMM, APU OPERATIONS NORMAL.SDR CWQR20130925042Tube · crackedDURING SCHEDULED INSPECTION, FOUND APU BLEED AIR TUBE ASSY CRACKED AT THE APU COMPARTMENT ATTACH FLANGE. FLANGE CRACKED 2 TO 3 INCHES WHERE THE FLANGE IS WELDED TO THE TUBE ASSY.SDR CWQR20131002041Tube · crackedDURING SCHEDULED INSPECTION, WE FOUND APU BLEED AIR TUBE ASSY CRACKED AT THE APU COMPARTMENT ATTACH FLANGE. THE FLANGE WAS CRACKED 2 TO 3" WHERE THE FLANGE IS WELDED TO THE TUBE ASSY.SDR CWQR20130925040Tube · crackedDURING SCHEDULED INSPECTION, FOUND APU BLEED AIR TUBE ASSY CRACKED AT THE APU COMPARTMENT ATTACH FLANGE. FLANGE CRACKED 2 TO 3 INCHES WHERE THE FLANGE IS WELDED TO THE TUBE ASSY.SDR CALA2013092391359Bleed Valve · failedAPU PNEUMATICS FAILED. REPAIRED & REPLACED APU BLEED VALVE IAW AMM. VERIFIED OPERATIONS & LEAK CHECKED GOOD. PLACARDS REMOVED.SDR CALA2013090991117Sensor · dirtyATSCV SHOWS OPEN WHILE APU IS RUNNING. CLEANED CLUSTER PNENMATIC SENSORS RAN APU, ALL CHECKED NORMAL.SDR CALA2013090490992Bleed Valve · faultySMELL OF TURBO ENGINE OIL IN CABIN AFTER APU STARTED & PACKS OPERATED AT GATE SFO. APU BLEED VALVE DEF INOPERATIVE IAW MEL PROCEDURE.SDR CALA2013082690727Module · malfunctionedAPU BLEED WILL NOT OPEN. APU BLEED OPERATED NORMAL FOR ABOUT 20 MINUTES (33-34PSI) THEN SURGE VALVE DUMPING AIR OVERBOARD. STARTED NR 2 ENGINE OK PRESSURE NORMAL TRIED TO START NR 1, PRESSURE DROPPED TO 9PSI THEN SLOW TO RISE TO 30 PSI. APU BLEED VALVE MUSTSDR CALA2013082190637Isolation Valve · faultyAPU BLEED VALVE WILL NOT OPEN. REPLACED APU BLEED ISOLATION VALVE PER MM. CHECKED OKAY.SDR UIEA2013080100420Transducer · failedAPU SURGE BLEED DUCT BLOWN, AND APU BLEED AIR INOPERATIVE. R & R PT TRANSDUCER IAW AMM 49-53-02, OPS CHECKED GOOD. R & R APU SURGE BLEED DUCT IAW AMM 49-53-01. OPS CHECKED. LEAK CHECKED GOOD.SDR UIEA2013073000417Bleed Air Sys · inoperativeAPU BLEED AIR FUNCTION INOPERATIVE.SDR UALA2013071905086Apu · failedZERO AIR PRESSURE FROM APU AFTER STARTED ON TAXI IN. SUSPECT APU FLOW SENSING MODULE BAD. REPLACED APU IAW AMM, OPS CHECKED GOOD 35 PSI.SDR UIEA2013071700390Packing · defectiveAPU BLEED DUCT IS LEAKING AT LOWER SIDE OF APU COMPRESSOR AT FLANGE ATTACH POINT. REPLACED DEFECTIVE PACKING WITH A SERVICABLE PACKING IN PNEUMATIC DUCT AT LOWER SIDE OF APU COMPRESSOR AT FLANGE ATTACH POINT. LEAK CHECKED GOOD IAW AMM 49-53-05.SDR UIEA2013071600373Clamp · brokenAPU OIL COOLING FAN INLET DUCT CLAMP BROKEN. INSTALLED NEW FAN INLET DUCT CLAMP AT APU OIL COOLING FAN IAW AMM 49-51-02.SDR UIEA2013071600374Coupling · misinstalledAPU LT; LWR DUCT COUPLINGS INSTALLED INCORRECTLY AFT OF SURGE CONTROL VALVE. ADJUSTED APU LT; LWR DUCT COUPLINGS IAW AMM 49-53-01.SDR UALA2013071104849Pneumatic System · malfunctionedAPU SHUTOFF VALVE SHOWS OPEN BUT VERY LITTLE INCREASE IN DUCT PRESSURE. REPLACED PNEUMATIC CLUSTER.SDR UALA2013071204891Valve · faultyAPU BLEED STATUS MESSAGE. REPLACED SURGE VALVE IAW MM 49-53-01. OPS CHECKED OK, NO LATCH MESSAGES. NO LEAKS.SDR IPXA13M79196Bleed Valve · inoperativeAFTER SELECTING ANTI-ICE ON ALL THREE ENGINES, WINGS, & TAIL, HAD MULTIPLE MALFUNCTIONS, STARTED WITH AVIONICS FAN OVERRIDE, BLEEDS 1 & 2 OFF, DUCTS 1 & 2 OFF CABIN IN FLOW LOW. REVERSED DMP 49-51-2-2, PERFORMED APU RTS OPS BITE TEST. TEST OK MM 49-00-00-SDR UALA2013062804545Actuator · faultyAPU DOOR STATUS MESSAGE, APU FAULTED. FOUND APU INLET ACTUATOR CIRCUIT BREAKER IN AFT BAY OPEN, RESET, OPENED APU DOOR FULLY. APU OIL LEVEL GOOD, 1 QT ADDED. CIRCUIT BREAKER TRIPPED TWICE ON SHUTDOWN WHEN DOOR CLOSING. SUSPECT ACTUATOR, REPLACED APU DOOSDR UIEA2013062500340Valve · failedAPU FAILED AFTER SELECTING APU BLEED TO OFF. R & R SURGE VALVE IAW AMM 49-53-01. OPS AND LEAK CHECKED OK.SDR REXA2013061701187Shutoff Valve · failed"CABIN ALT MESSAGE "LEFT 10TH SOV ARMED BUT NEVER OPENED, LT PACK NEVER CAME ON, DUE TO RT PACK DEFER, ACFT NEVER PRESSURIZED TRIED MULTIPLE RECYCLES, LT 10TH SOV REMAINED ARMED. RAN QRH LT 10TH REMAIN ARMED. TOOKOFF WITH APU ON BLEEDS ON APU. PROBLEM OCCURSDR UALA2013060603925Clamp · brokenLEFT SIDE APU FLEX DUCT INBD CLAMP BROKEN. INSTALLED NEW CLAMP, LEAK CHECKED OK.SDR UALA2013052903741Pressure Switch · failedAPUC DETECTED LOSS OF ABILITY TO PNEUMATICALLY LOAD APU. MESSAGE IS TRIGGERED BY IGV OR SURGE CONTROL SYS FAULTS. REPLACED DIFFERENTIAL PRESSURE SWITCH. OP CHECKED GOOD. STATUS MESSAGE CLEARED.SDR UALA2013052403614Duct · crackedAPU BLEED DUCT CRACKED AFT CARGO LT. REMOVED BETWEEN STA 1100 & 1197.22. REPLACED APU BLEED DUCT AFT CARGO LT BETWEEN STA 1100 & 1197, LEAK CKS OK.SDR UALA2013032802014Valve · faultyAPU BLEED AIR STATUS MESSAGE. REPLACED SURGE VALVE AND CLEARED MESSAGE. BLEED AIR OPS NORMAL.SDR ASAA2013032794280Apu · leakingA DIRTY SOCK ODOR OCCURRED STARTING T/O ROLL AND WAS GONE AT 20,000 FT ON CLIMB. NO ODOR DURING FLIGHT. THE ODOR REAPPEARED ON DESCENT AT 15,000 UNTIL LANDING. IT WAS DETECTED THROUGHOUT THE CABIN AND COCKPIT. ACFT GROUNDED. ACCOMPLISHED CABIN ODOR T/S IAWSDR USAA2013032100021Cooling Fan · leakingDURING CRUISE, EN ROUTE FROM MEX TO PHX, CREW REPORTED A DIRTY SOCK SMELL IN MID CABIN. FLIGHT LANDED UNEVENTFUL IN PHX. MAINTENANCE DETERMINED ENGINES WERE NOT SOURCE OF SMELL. RAN BOTH ENGINES EXTENSIVELY WITH NO ODOR. FOUND APU AIR INLET AND COMPARTMENTSDR UALA2013031401511Bolt · brokenFOUND AIR SENSE LINE FROM PNEUMATIC CLUSTER UNSECURED FROM PLENUM. FOUND STATIC PRESSURE LINE TO PLENUM RETAINING BOLT HEAD BROKEN OFF DURING INSPECTION OF PNEUMATIC CLUSTER AND SENSE LINES ITEM 33. DRILLED OUT BOLT, THREADS NEED TO BE CLEANED UP OR HELI COSDR UALA2013031401560Controller · faultyAPU BLEED AIR STATUS MSG DISPLAYED AFTER APU START. FAULT CODE LATCHED 495 00 1 00, NO CORRELATED MSGS. APU BLEED AIR STATUS MSG CLEARS AFTER APU SHUT DOWN AND RE-APPEARS DURING START, ALL SYNOPTIC INDICATION AND DUCT PRESSURE NORMAL. REMOVED AND REPLACED ASDR UALA2013030801391Bleed Valve · inoperativeAPU BLEED VALVE INOPERATIVE CLOSED. FLT CREW CONFIRMED VALVE CLOSED. REPLACED APU BLEED VALVE PER AMM, OPS CHECK GOOD WITH NO DEFECTS NOTED.SDR UIEA2013030100108Bleed Air Sys · inoperativeAPU BLEED AIR INOPERATIVE. RESTARTED APU, BLEED AIR OPS CHECK OK IAW AMM 49-11-00.SDR UALA2013021800974Isolation Valve · faultyBLEED VALVE APU STATUS. REPLACE ISOLATION VALVE MM.
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