JASC 4920
Service difficulty reports · 2,431
Reports filed under 4920 · APU Core Engine, 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 = '4920' 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 = '4920' 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 UALA2012011100228Sensor · failedAPU AUTO SHUTDOWN AFTER REACHING NORMAL RPM FL370. FL 330 STARTED NORMALLY MESSAGE 4911110 INACTIVE ER MODE. REPLACED DIFFERENTIAL PRESSURE SENSOR PER MM AND TOTAL PRESSURE SENSOR PER MM. OPS CHECKED NORMAL.SDR USAA2012011100006Seal · leakingCABIN FILLED WITH VERY STRONG DIRTY SOCK SMELL ON DESCENT. MAINTENANCE REMOVED AND REPLACED THE APU. ALSO FOUND BLUE HYDRAULIC MANIFOLD LEAKING AT HP FILTER 2048GM - SECURED MANIFOLD WITH NO FURTHER LEAKS. VENDOR CONFIRMED THE FAILURE OF THE APU DUE TO LOADSDR UALA2012010900207Thermocouple · faultyAPU ALTITUDE NO START - COLD SOAKED. APU SHUTDOWN AFTER REACHING 95 PERCENT SPEED AFTER 10 SECONDS. APU RAN STABILIZED AT 100 PERCENT FOR 1 MIN THEN APU FAULT AND APU GEN EICAS MESSAGE DISPLAYED. ACCOMPLISHED SUCCESSFUL APU ALT COLD SOAK START. REPLACED NSDR ASAA12510916Apu · leakingAIRCRAFT VENTILATION SYSTEM HAS THE DIRTY SOCK SMELL. OPERATED APU AND PACKS. VERIFIED DIRTY SOCK/OIL ODOR IN VENTILATION SYS. PERFORMED T/S PER FIM TASK 21 00 00 810 806 AND AMM 05 60 00 280 801C AND FOUND OIL LEAKING FROM APU LOAD COMPRESSOR CASE DRAIN. SDR CA120113011Engine · failed(CAN) APU FOUND TO HAVE IMPELLER DAMAGE AND HOT SECTION DIFFUSER DAMAGE AFTER BOROSCOPE INSPECTION. ENGINEERING DESCRIPTION: WHILE UNDERGOING C-CHECK HEAVY MAINTENANCE THE ACFT`S APU WAS REMOVED TO FACILITATE ACCESS TO OTHER ACFT COMPONENTS. FOLLOWING REMOVASDR UALA2012010600146Controller · malfunctionedAPU AUTO SHUTDOWN TWICE AT GATE. RESET APU CONTROLLER, STARTED APU 5 TIMES, STARTED ENGINES USING APU PNEUMATICS. NO FAULTS IN CMC.SDR REXA201200030Apu · contaminatedAIR RETURN AND EMERGENCY DECLARED. DID AN ATB TO CLE DUE TO SMOKE FILLING UP THE CABIN. EMERGENCY WAS DECLARED AND AIRCRAFT LANDED SAFELY IN CLE. FOUND APU ENCLOSURE FILLED WITH GLYCOL. CLEANED UP GLYCOL AND RAN ENGINE. NO SMOKE FOUND.SDR A6WA201240005Engine · failedAPU AUTOSHUTDOWN AFTER START, FOLLOWED BY APU FAULT. SMOKE VISIBLE FROM APU EXHAUST AND APU INLET DOOR. CW OPS TEST OF APU POWERPLANT IAW AMM 49-10-00. OPS CK GOOD, NO OIL LEAKS NOTED, ACFT OK FOR SERVICE, NO EVIDENCE OF FIRE NOTED.SDR ASAA12510871Apu · failedAPU QUIT ON PUSHBACK. REPLACED APU LOW OIL PRESS SWITCH IAW MM49 94 22, NO HELP. REPLACED APU ECU IAW MM 49 61 12, NO HELP. RE-INSTALLED ORIGINAL PART. REMOVED AND REPLACED APU PER T/C 78349010. OPS CHECK NORMAL. A/C OK FOR SERVICE.SDR UALA2012010300051Apu · shutdownAPU AUTO SHUTDOWN. REPLACED OIL CLUSTER-OIL FILTER ELEMENTS. CLEANED CONNECTOR TO OIL TEMP SENSOR AT OIL LUBRICATION CLUSTER AND OIL QUANTITY-SUMP TEMP SENSOR AT OIL TANK. WASHED OUT AIR-OIL COOLER ALSO. SERVICED APU OIL AND ACCOMPLISHED APU OPERATIONAL CSDR SIMA2012004001Apu · contaminatedON FLIGHT 3864 THE CREW REPORTED SMOKE IN AFT CABIN ON APU RESTART. THE AIRCRAFT CAME FROM THE DE-ICE PAD. THE AIRCRAFT WAS REMOVED FROM SERVICE. PERFORMED OPERATIONAL CHECK OF THE APU. ALL PARAMETERS WERE NORMAL. RAN APU AND PACK FOR 1 HOUR, ALL EVIDENCE SDR ASAA11510866Apu · malfunctionedDUE TO APU EGT ABOVE THE THRESHOLD POWERPLANT ENGINEERING REQUEST THE APU BE REMOVED. REPLACED APU. OPS/LEAK CHECK OK. REF T/C 78349010.SDR ASAA11510867Apu · malfunctionedAFTER APU START "DIRTY SOCK SMELL WAS PRESENT IN CABIN AND COCKPIT, WENT AWAY AFTER ENGINE START. ON LANDING SAN SAME SMELL WAS AGAIN PRESENT. DUE TO RECENT HISTORY ENGINEERING REQUESTS APU BE REPLACED. OIL FOUND AT APU BLEED AIR VALVE CONFIRMING APU AS THESDR REXA201101027Apu · contaminatedAIR TURNBACK, EMERGENCY DECLARED. SMOKE IN CABIN COCKPIT. REMOVED AND REPLACED COALESCER BAG LT & RT IAW AMM 21-51-00. OPS CHECK NORMAL FOUND GLYCOL IN APU COOLING INLET, CLEANED RELATED DUCTS AND APU ENCLOSURE, RAN APU & PACKS NO DEFECTS NOTED AT THIS TIME SDR USAA2011122700031Apu · damagedFLIGHT ATTENDANTS REPORTED A DIRTY SOCK SMELL ON APPROCH INTO PHL CAUSING DIZZINESS. AFT F/A WENT ON OXYGEN FOR REMAINDER OF THE FLIGHT. MAINTENANCE REMOVED AND REPLACED THE APU, THE LEFT PRIMARY HEAT EXCHANGER AND NR 1 & 2 PRECOOLER EXCHANGERS. HONEYWELL SDR DALA1201963361Apu · malfunctionedDURING APU RELIABLITY COLD SOAK START TEST, APU FAILED TO START ON 3 ATTEMPTS. MAXIMUM EGT 1015, FL400. APU WAS REPLACED ON LOG 8652429. COLD SOAK VERIFICATION TEST WAS GOOD. ETOPS CATEGORY 'F': ANY OTHER EVENT DETRIMENTAL TO ETOPSSDR A6WA201141147Apu · smokeON DEPARTURE, VISABLE SMOKE ENTERED COCKPIT ALONG WITH ACRID ODOR. SMOKE CLEARED WHEN COMPLETED. LANDED OVERWEIGHT, LANDING WEIGHT 50170. INSPECTED AND FOUND GLYCOL IN APU AREA, CLEANED AREA UP AND RAN WITH NO RE-OCCURANCE OF SMOKE REF LP 229736/2 FOR DFDRSDR ASAA11510825Apu · leakingAFTER ENGINE START WHEN TURNING ON PACKS HAD DIRTY SOCK SMELL. REF MM 05 60 00 280 801 STEP 3 FOUND OIL PRESENT IN LOAD COMPRESSOR SEAL WITNESS DRAIN. REPLACED APU REF MM 49 13 11 MM49 11 00 000 803. LEAK CHECKED AND SERVICED OIL ON NEW APU REF MM 49 11 00 4SDR SIMA2011350002Apu · malfunctionedDURING SCHEDULED MAINTENANCE THE APU WOULD NOT START ON FIRST ATTEMPT (BUT LARGE FUEL ODOR PRESENT) THEN STARTED ON SECOND ATTEMPT. SEEMS TO ABORT START AT APROXIMATLEY 25 PERCENT RPM. PERFORMED AN OPERATIONAL CHECK ON APU IAW CRJ 700 AMM 49-10-00. NO FAULTSDR SWIA201128906Apu · fireON PUSHBACK THE GROUND CREW REPORTED THE APU ON FIRE. NO INDICATION WAS GIVEN IN THE COCKPIT. AS CORRECTIVE ACTION CA PRESED THE APU FIRE PUSH. FIRE DEPARTMENT REPORTED NO FIRE AFTER INSPECTION. (FLT 4665) REPLACED APU ASSEMBLY. P/N: 3800488-3 S/N OFF: SDR A6WA201240075Apu · contaminatedABORTED TAKE OFF AT AROUND 40 KTS FOR APU OVERTEMP, FOLLOWED BY APU SHUTDOWN AND APU FAULT CAUTION MESSAGE. FOUND GYLCOL INGESTED IN APU INTAKE. R & R APU ASSY REF AMM 49-10-00. OPS AND LEAK CHECKED GOOD AT THIS TIME.SDR MYWA110130Unknown · malfunctionedETOPS SIGNIFICANT SYSTEM: APU FAILS TO START ON FIRST ATTEMPT. ACCOMPLISHED OPERATIONAL CHECK OF APU SEVERAL TIMES IAW B737-400 M/M 49-11-00 OPS CHECK NORMAL. NO DEFECTS NOTED AT THIS TIME.SDR UALA2011121206802Apu · shutdownON DEPARTURE, APU AUTO SHUTDOWN. ACCOMPLISHED SEVERAL STARTS AT GATE, LOADED APU PNEU & ELECTRICAL, OPERATED APU FOR OVER AN HOUR, APU OPERATED NORMALLY PER JRH, NO FAULTS OR FAILURE MESSAGES.SDR IPXA11570575Gearbox · failedRT GENERATOR OFF LIGHT ON TAKEOFF. LT AND RT UTILITY BUSSES TRIPPED, APU SHUTDOWN WITH APU FAULT. EMERGENCY DECLARED. TROUBLESHOT APU IAW FIM 49-11-00-815-855-001, FOUND OIL COOLING FAN DRIVE GEARS AND APU GEARBOX DRIVE GEARS DAMAGED IAW STEP 5 AND 13 OF SDR ASOA201102335Apu · smokeAFTER APU SHUTDOWN, THERE WAS A LARGE AMOUNT SMOKE COMING FROM APU EXHAUST AREA AUXILIARY POWER UNIT APU. DOOR POSITION VERIFIED CLOSED. R & R APU ASSEMBLY IAW AMM 49-10-00. OPS AND LEAK CHECKED GOOD.SDR UALA2011120806737Turbine Blades · damagedAPU 2ND STAGE TURBINE BLADES HAVE SEVERE BLADE TIP DAMAGE. REPLACED APU.SDR UALA2011120706731Turbine Blades · damagedAPU AUTOSHUTDOWN UNDER BOOST CONDITIONS. APU 2ND STAGE TURBINE BLADES HAS SEVERE BLADE TIP DAMAGE. REPLACING APU.SDR USAA2011120800020Apu · leakingFLIGHT ATTENDANT REPORTED A MUSTY ODOR AT MID AND AFT CABIN WHILE PARKED AT THE GATE AND USED PORTABLE OXYGEN. FLIGHT WAS SUBSEQUENTLY CANCELLED. REMOVED AND REPLACED THE APU.SDR USAA2011113000015Apu · failedPHL FLT 1199 AT GATE, PRIOR TO PHL - PHX FLIGHT. APU AUTO SHUTDOWN FAULT LIGHT ILLUM, EICAS MSG FAULT DISPLAYED. HAZE & SMELL THROUGHOUT CABIN PRIOR TO SHUTDOWN. MAINTENANCE FOUND THAT APU HAD MAJOR FAIL. REPLACED THE APU ASSY.SDR ASAA11510669Apu · making metalAPU WILL NOT START FAULT LIGHT ILLUMINATED. DURING T/S OF APU FAULT FOUND THE MAGNETIC DRAIN PLUG COVERED WITH MAGNETIC SILVER COLORED PARTICLES. IAW FIM TASK 49 91 81 200 801 APU REPLACEMENT IS REQUIRED. APU CHANGE COMPLETED. NO DEFECTS NOTED.SDR SWIA201128510Apu · failedAPU ASSEMBLY HAD AN UNCONTAINED FAILURE. (SERVICE) REPLACED APU ASSEMBLY AND APU GENERATOR PER AMM. P/N: 3800488-3 S/N OFF: P-1020 / P/N: 720845E S/N OFF: 3880.SDR UALA2011110405999Apu · malfunctionedSMOKE IN CABIN AFTER APU STARTED AND PACKS ON SMOKE STOP W-PACKS OFF. DEFERRED APU BLEED. OPS BOTH PACKS ON GRD AIR, FOUND NEGATIVE ODOR OR SMOKE. CK FOR POSSIBLE APU BLEED CONTAMINATION. RAN APU AND PACKS. FOUND SMELL OF OIL. CANNOT ACCESS APU BECAUSE APSDR ASAA11510623Apu · failedFOLLOW UP TO REPORTS OF APU HOT START GROUNDED YES. PERFORMED APU FIRST STAGE TURBINE WHEEL INSPECTION WITH BOROSCOPE REF 49 21 00. FOUND NO WALKING OF TURBINE BLADES OR DEFECTS. PLUG REINSTALLED FROM AIR/OIL SEPERATOR ADAPTER IAW AMM 49 21 00. OPS AND LEAKSDR UALA2011110305961Apu · malfunctionedUPON ARRIVAL APU OIL AT 1.3 WITH APU RUNNING. AFTER SHUTDOWN QTY TO 0.0. SIGHT GAUGE SHOWS NO OIL IN APU . SVC OIL. CHECK FOR LEAKS. NO LEAKS NOTED. APU QTY NOW READS 7.2. APU STARTS NORMALLY. APU QUICK INSPECTION SHOWED NO OBVIOUS LEAKS EXTERNALLY OR TAISDR ASAA11510587Solenoid Valve · failedAPU HAS REPORT OF START EGT OF 1000 DEGREES AND FAULT LIGHT ILLUMINATING WITH FAULT MESSAGE 49-41010 LOGGED ON CDU. ACFT GROUNDED. PERFORMED FIM TASKS NO PROBLEMS NOTED. REPLACED T2 AND P2 SENSORS (AMM REFERENCE 49-61-31 AND 49-52-31). REPLACED THE FFD SOLENOSDR ASAA11510586Engine · overtempDUE TO APU EGT ABOVE THE THRESHOLD. REMOVED APU AND INSTALLED SERVICEABLE APU. OPS & LEAK CHECKED OK.SDR UALA2011102105692Apu · inoperativeAPU FAILED TO START. SUSPECT APU BATTERY. REPLACED APU BATTERY, REPLACED STARTER AND REPLACED AUX POWER CONTROL UNIT, NO HELP. REMOVED AND REPLACED APU PER AMM, OPS CHECKED OKAY.SDR USAA2011102000001Apu · malfunctionedSTRONG MUSTY ODOR REPORTED BY FLIGHT ATTENDANTS. PACK ON HIGH ODOR DISSIPATES. MAINTENANCE PERFORMED J/C 33L00021001 - NO DISCREPANCIES. NOTED ON GROUND. NOTE: HEPA FILTER(8EA) REPLACEMENT PROGRAMMED. PHL MAINTENANCE REMOVED AND REPLACED APU ASSEMBLY AND SDR UALA2011101705590Engine · shutdownAPU WILL NOT START. APU STARTED NORMAL 5 OF 5 TIMES. ONE HIT IN FAULT HISTORY. CHECKED OKAY.SDR UALA2011101205552Ecu · unknownAPU NO START. NO MESSAGES FOUND ON BOX. STARTED FIRST TIME AND SEVERAL MORE TIMES, COULD NO DUPLICATE ON GROUND. FOUND NO FAULTS ON ECU & FIRST ATTEMPT FAILED, REPLACED ECU PER MM.SDR MASA2011101263846Engine · failedAPU AUTO SHUT DOWN WHEN APU ATTEMPTED TO START ENGINE THERE WAS A LOUD BANG, A FIRE BALL CAME OUT OF THE EXHAUST AND THEN SMOKE POURED OUT. REMOVED AND REPLACED APU.SDR UALA2011101005482Actuator · failedAT GATE, APU FAILED WITH FAULT LIGHT. TRIED RESTART 3 TIMES, FAILED ALL 3 TIMES. REMOVED AND REPLACED APU INTAKE DOOR ACTUATOR IAW AMM. OPS CHECKED NORMAL.SDR UALA2011092905283Rod · damagedAPU PERFORMANCE DETERIORATION. UPON APU REMOVAL AND FIRE WALL INSPECTION FOUND BAD ROD END AT LEFT UPPER OUTBD POSITION. REPLACED ROD ASSY.SDR ASAA11510440Apu · oil consumptionAPU OIL CONSUMPTION CONTINUES TO BE GREATER THAN EXPECTED. REPLACED APU IAW AMM 49 11 0.SDR CALA2011092700624Apu · malfunctionedAPU HAD AUTO SHUT DOWN. REMOVED AND REPLACED APU PER AMM 49-11-01. OPS AND LEAK CK GOOD. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1016129 S/N OFF 01353 APU, AUXILIARY. OFF 25-4911-9-0001 1353, ON 25-4911-9-0001 1286.SDR ASAA11510398Unknown · malfunctionedAPU WILL NOT START AUTO SHUTDOWN FOR LOW OIL PRESSURE. CIRCUIT BREAKERS ALL IN. COULDN'T DUPLICATE OPS CHECK NORMAL OK FOR SERVICE.SDR AALA20110917DFW03Apu · shutdownDFW - CREW REPORTED AUXILIARY POWER UNIT AUTO SHUT DOWN IN FLIGHT WITH LEFT ENGINE CONSTANT SPEED DRIVE ON PLACARD. FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED AUXILIARY POWER UNIT. SYSTEM GROUND CHECK NORMAL OPERATSDR ASAA11510382Seal · out of limitsPER T/C 78349000 SIGMA SEAL OUT OF LIMITS FOR COMPRESSION CHECK AT 1.1 INCHES. REPLACED SIGMA SEAL ON APU REF MM 49 15 11.SDR C2XA11IA220Apu · malfunctionedIAH - FLIGHT 2373 THE CREW REPORTED THAT THE APU FAILED ON ROTATION OUT OF JAX WITH AN APU OIL LO PRESS MESSAGE AND A BURNING OIL ODOR. THE AIRCRAFT CONTINUED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE APU AND PLACED IT ON MEL 49-00-0SDR ASAA11510357Apu · malfunctionedAPU EGT ABOVE THE THRESHOLD, APU REMOVED & REPLACED IAW MM 49-11-00-400-803 THRU STEP L(7).
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