Allison 250-C20B
Service difficulty reports · 1,981
Newest first. General aviation reporting is voluntary.
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 engine_model_key = '250C20B' 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 engine_model_key = '250C20B' 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 2026FA0000798Lock Nut · failedMS21043 NUTS ARE UTILIZED TO SECURE TURBINE, COMPRESSOR, FUEL CONTROL, GOVERNOR, AND HAVE BEEN FOUND NUMEROUS TIMES TO HAVE NOT MAINTAINED THE MANUAL SPECIFIED TORQUE AND HAVE BACKED OFF. NUMEROUS TIMES NUTS HAVE ARRIVED WITHOUT ANY DRAG TORQUE. THE LOCKING FESDR 2024FA0000959Engine · making metalPILOT EXPERIENCED AN ENGINE CHIP LIGHT DURING LANDING. ENGINE REMOVED FROM AIRCRAFT FOR FURTHER INVESTIGATION.SDR 2024FA0000958Engine · making metalPILOT EXPERIENCED AN ENGINE CHIP INDICATION DURING APPROACH. MAINTENANCE PERFORMED CLEANING AND GROUND RUNS AND RETURNED TO SERVICE.SDR 2024FA0000554Clutch · making metalDURING A SCHEDULED 100 HOUR MAINTENANCE INSPECTION ON THE AIRCRAFT. THE MECHANIC QUESTIONED THE DARK BURNT APPEARANCE OF THE GREASE IN THE • BEARING, OVERRUNNING CLUTCH BALL OUTPUT. PER OPERATOR REQUEST THE CLUTCH ASSEMBLY WAS DISASSEMBLED AND A SIGNIFICANT AMSDR 2024FA0000495Clutch · making metalDURING AIRCRAFT INSPECTION AN AIRCRAFT MECHANIC QUESTIONED DISCOLORING OF THE OVERRUNNING CLUTCH OUTPUT BEARING GREASE. THE BEARING DID NOT DEMONSTRATE ANY ABNORMAL PLAY OR ROUGHNESS. THE CLUTCH HAD THE CORRECT AMOUNT OF OIL INSTALLED. IT WAS DECIDED TO DISASSDR 2024FA0000203Engine · making metalPILOT REPORTED AN ENGINE CHIP LIGHT ILLUMINATION AND PERFORMED AN UNSCEDULED LANDING. A MECHANIC WAS SENT TO THE AIRCRAFT AND DISCOVERED METAL ON THE UPPER ENGINE GEARBOX PLUG WITH A SIZE GREATER THAN EXCEPTABLE LIMITS FOR RETURN TO SERVICE. NOTHING FURTHER TOSDR 3M3A202401060001Unknown · unknownON JANUARY 1ST 2024, N514PA EXPERIENCED AN ENGINE CHIP LIGHT DURING A 135 TOUR FLIGHT. THE PILOT MADE A PRECAUTIONARY LANDING. ALL PASSENGERS WERE REMOVED WITH A SECOND HELICOPTER CARRYING MAINTENANCE PERSONNEL. LARGE CHUNKS OF ROLLER BEARING CAGE MATERIAL WERSDR 2023FA0000497Engine · abnormalUDRING STRAIGHT AND LEVEL FLIGHT THE PILOT REPORTED LOW ENGINE TORQUE. THE PILOT SELECTED A LANDING SPOT AND PERFORMED AN UNEVENTFUL PRECAUTIONARY LANDING. THE AIRCRAFT WAS MOVED TO A MAINTENANCE LOCATION AND THE ENGINE WAS REMOVED FOR INSPECTION. NO CAUSE DETSDR 2023FA0000285Connector · looseDURING FLIGHT THE PILOT NOTICED THE FUEL QUANTITY GAUGE DROPPED TO ZERO THEN THE ENGINE OIL TEMP WENT TO ZERO. THE INSTRUMENT CIRCUIT BREAKER THEN POPPED. THE PILOT LANDED WITHOUT ISSUE. THE PILOT RESET THE CIRCUIT BREAKER ONCE SHUT DOWN AND MAINTENANCE COULD SDR 2022FA0000760Engine · making metalENGINE GEARBOX CHIP LIGHT ILLUMINATED DURING APPROACH FOR LANDING. UPON INSPECTION IT WAS DETERMINED THAT THE UPPER GEARBOX MAGNETIC CHIP DETECTOR HAD ILLUMINATED THE WARNING LIGHT WITH METAL ABOVE THE MAXIMUM ALLOWED. A SMALLER AMOUNT OF METAL WAS FOUND ON THSDR 2022FA0000677Engine · making metalPILOT GOT AN ENGINE CHIP LIGHT DURING FLIGHT AND PERFORMED A PRECAUTIONARY LANDING. MAINTENANCE FOUND EVIDENCE OF CHIPS ON THE LOWER AND UPPER ENGINE GEARBOX CHIP DETECTORS. ENGINE REMOVED FROM AIRCRAFT FOR INSPECTION.SDR 2022FA0000286Hub · crackedA CRACK WAS FOUND ON THE OUTSIDE OF M/R HUB ORIGINATING FROM INBOARD TT PIN HOLE. THE CRACK EXTENDS FROM THE INSIDE DIAMETER OF THE BORE TO THE OUTSIDE OF THE HUB. AFTER CLOSE EXAMINATION IT SEEMS THAT THERE ARE ROUGH MACHINING MARKS THAT CAUSED A STRESS CONCESDR K2DA0182ECompressor · noneAIRCRAFT N508PH, A MD500E, WAS CONDUCTING A UTILITY FLIGHTS UNDER AN OAS CONTRACT AND PERFORMED A PRECAUTIONARY LANDING AT 21°35’ 10.9” N, 158° 00’ 44.7” W DUE TO SMOKE EMANATING FROM THE ENGINE. THE PILOT WAS THE ONLY OCCUPANT OF THE AIRCRAFT. AFTER LANDINGSDR 2021FA0000137Turbine Wheel · bindingDURING MAINTENANCE THE MECHANICS DETERMINED THE FIRST STAGE TURBINE BLADES WERE RUBBING ON THE NOZZLE.ASSEMBLY REMOVED FROM ENGINESDR 2021FA0000047Fuel Control · failedFIRST FUEL CONTROL UNABLE TO ADJUST START , SECOND FUEL CONTROL WAS UNABLE TO START AT ALL, REPLACED FUEL CONTROL DISCREPANCY WAS FIXED. THIS WAS ALL IN A YEARS TIME. ON AIRCRAFT 748 THE FUEL CONTROL WAS CHANGED DUE TO THE THROTTLE ARM WAS DIFFICULTY TO ROTATESDR 2021FA0000078Fuel Control · failedAIRCRAFT ENGINE WOULD NOT START. FUEL CONTROL REMOVED AND REPLACED DISCREPANCY CORRECTED. THIS IS THE FINDINGS OF THE REPAIR STATION THE FUEL CONTROL WAS SENT TO. THIS IS NOT THE SAME REPAIR STATION THAT THE FUEL CONTROL WAS OVERHAULED AT. THE FUEL CONTROL BELSDR 2019FA0000338Fuel Control · leakingDURING MAINTENANCE GROUND RUN CHECK OPERATIONS ENGINE FUEL WAS NOTICED COMING OUT OF THE FUEL CONTROL CASE AND LEAKING TO THE GROUND. FUEL CONTROL WAS REMOVED FOR INVESTIGATION AND A SERVICABLE UNIT INSTALLED.SDR 2019FA0000298Coupling · brokenFAILURE OF THE AFT COUPLING. FRACTURE OF COUPLING. SEE ENGINEERED PRODUCTS 8130-3 WORK ORDER # MDI1167 DATED MARCH 20, 2018 FOR PART DETAIL.SDR CA190716006Governor · faulty(CAN) AIRCRAFT WAS IN FLIGHT AND PILOT NOTICED A DROP IN ENGINE RPM FROM 100% TO 90%. STARTED DECENT ON A BUSH ROAD. GOVERNOR WAS REPLACED WITH A SERVICEABLE UNIT. NO DAMAGE OR INJURY (TC# 20190716006)SDR DCGA2019FA0000153Engine · making metalENGINE CHIP LIGHT DURING FLIGHT. MAINTENANCE FOUND 4 FLAKES ON UPPER AND LOWER PLUGS WITHIN PARAMETERS. PERFORMED AN OIL SYSTEM DRAIN, FLUSH AND FILTER CLEAN AND CHANGE AND GROUND RUN. CHIP PLUGS WERE CLEAN UPON REINSPECTION. AIRCRAFT WAS RETURNED TO SERVICE.SDR BHHR20190607001Housing · crackedA CRACK WAS FOUND IN TRANSMISSION LOWER HOUSING JUST BELOW THE CYCLIC BELLCRANK BRACKET P/N 33031 MOUNTING FACE. THE CRACK WAS LOCATED IN THE AFT LOWER MOUNTING BOSS FOR THE CYCLIC BRACKET IN THE FILLET OF THE LOWER HOUSING. SEE ATTACHED PICTURES. CORRECTIVE ASDR K2DA2019052800001Bleed Valve · stuckPILOT PERFORMED ENGINE POWER ASSURANCE CHECK AT 80% TQ AND 2,000 FT AGL AND REPORTED A +1* ON THE POWER CHECK WHICH WAS A SIGNIFICANT DIFFERENCE IN THE POWER CHECK TAKEN THE DAY PRIOR (+30). UPON LANDING, MAINTENANCE PERSONNEL WERE CALLED AND IT WAS DISCOVEREDSDR CA190326009Compressor · fod(CAN) THE RENTAL ENGINE RAN HOT FROM THE FIRST DAY I FLEW IT. THE STARTS WHERE VERY SLOW BUT STILL IN PARAMETERS. THE TOT WAS APPROX. 580 DEGREES AT GROUND IDLE AND 580-600 AT FLIGHT IDLE WITH 18-20 PSI TQ. THE SECOND STARTS WERE OK, THEY WOULD BE ON THE HOTTESDR K2DA2019052800003Bleed Valve · sticksDURING AN ROUTINE INSPECTION IT WAS DISCOVERED THAT THE ENGINE BLEED VALVE WAS STICKING. BLEED VALVE HAD 317.2 TSO.SDR 2019FA0000075Blade · crackedTHE BOTTOM SKIN OF THE MAIN ROTOR BLADE HAS A 4 1/2 INCH CRACK STATING AT THE TRAILING EDGE AND PERPENDICULAR TO SPAN 57 1/4 INCHES IN FOR BLADE TIP.SDR CA190507012Stator · broken(CAN) UPON ROUTINE INSPECTION OF COMPRESSOR CASE HALFS (WHILE ENGINE WAS REMOVED FROM AIRFRAME) IT WAS FOUND THAT ONE OF THE 6TH STAGE STATOR BLADES HAD BROKEN OFF ONE OF THE CASE HALFS AND BEEN INJESTED INTO THE COMPRESSOR CENTRIFUGAL COMPRESSOR SECTION, AND SDR 2020FA0000049Rotor · crackedA CRACK INDICATION WAS INDICATED 7/16 INCHES LONG, 10 INCHES FROM UPPER END OF MAST. CRACK WAS FOUND WITH FLORESCENT MAGNETIC PARTICLE. INSPECTION WAS DONE PER TASK, AS REQUESTED BY CLIENT.SDR K2DA2019052800002Bleed Valve · stuckPILOT WAS RUNNING ENGINE ON THE GROUND AND THE COMPRESSOR STARTED STALLING. MAINTENANCE PERSONNEL DISCOVERED THE ENGINE BLEED VALVE WAS STUCK IN THE CLOSED POSITION. BLEED VALVE HAD 103.4 TSO. BLEED VALVE WAS CHANGED OUT AND THE ISSUE WENT AWAY.SDR J5XA2019FA0000031Chip Detector · contaminatedPILOT REPORTED AN ENGINE CHIP LIGHT DURING APPROACH TO LANDING. MAINTENANCE FOUND ACCEPTABLE CHIPS ON UPPER AND LOWER PLUGS. THE PLUGS WERE CLEANED AND REINSTALLED AND A PENALTY RUN WAS PERFORMED. THE PLUGS WERE RECHECKED AND FOUND CLEAN. AIRCRAFT WAS RETURNEDSDR LSSA2018F00000Drive Bearing · failedTHE AIRCRAFT SUFFERED AN INFLIGHT ENGINE OVERSPEED AND SUBSEQUENT ENGINE FAILURE. THE PILOT PERFORMED A SUCCESSFUL AUTOROTATION TO THE GROUND WITH NO DAMAGE TO THE AIRFRAME AND NO INJURIES TO THE OCCUPANTS. AFTER RECOVERY OF THE ACFT AND REMOVAL. INSPECTIONSDR CA190110019Safety Valve · failed(CAN) IT WAS REPORTED TO BELL: ENROUTE WITH A PASSENGER AND SUSTAINED A SUDDEN POWER LOSS. PILOT AUTOROTATED TO AN OPEN FIELD AND THE LANDING GEAR WAS DAMAGED DURING LANDING BUT AIRCRAFT REMAINED UPRIGHT. INVESTIGATION FOUND THE PC SAFETY VALVE HAD FAILED. NO SDR MKHR2018091300000Bolt · shearedDURING CRUISE FLIGHT THE PILOT EXPERIENCED AN EXCESSIVE TAIL ROTOR VIBRATION. THE PILOT THEN EXECUTED A PRECAUTIONARY LANDING. WHEN CREW ARRIVED TO INVESTIGATE THE VIBRATION THE INITIAL DISCOVERED WAS THAT THE OUTBOARD TAIL ROTOR FORK BOLT WAS SHEARED.SDR CA180723016Monitor · cracked(CAN) DURING SCHEDULED MAINTENANCE, THE TRANSMISSION OIL MONITOR HOUSING WAS REMOVED TO INSPECT THE SCREEN FOR CONTAMINATION. UPON REMOVAL OF THE O-RING FROM THE TRANSMISSION OIL MONITOR IT WAS DISCOVERED THAT THERE WAS CRACKING AROUND THE MOUNTING FLANGE OF SDR DCGA2018071200221Chip Detector · contaminatedPILOT REPORTED AND ENGINE CHIP LIGHT AND PERFORMED AN UNSCHEDULED LANDING. MAINTENANCE FOUND 1 SLIVER ON THE UPPER GEARBOX CHIP PLUG. THE PLUG WAS CLEANED AND A PENALTY ENGINE RUN WAS PERFORMED IN REFERENCE TO THE ENGINE OMM. THE PLUGS WERE FOUND CLEAN AND THESDR DCGA201801230044Engine · making metalDURING CRUISE FLIGHT AND ENGINE CHIP LIGHT INDICATION OCCURRED. THE PILOT PERFORMED A PRECAUTIONARY LANDING. MAINTENANCE DISCOVERED METAL FLAKES ON UPPER AND LOWER ENGINE CHIP PLUG. PER MAINTENANCE MANUAL INSTRUCTION IT WAS DETERMINED THAT THE ENGINE ASSEMBLY SDR CA180117008Drive Shaft · worn(CAN) NOTED A KNOCKING NOISE NEAR TAIL ROTOR GEARBOX AFTER AIRCRAFT LANDED FOR MAINTENANCE. FOUND EXCESSIVE PLAY BETWEEN AFT TAIL ROTOR DRIVESHAFT SEGMENT AND HANGER BEARING. DISASSEMBLED AFT SEGMENT AND FOUND WEAR ON BEARING MATING SURFACE OF THE SHAFT, AS SDR HDNA2018F00066Engine · making metalENGINE CHIP INDICATION. PILOT FOLLOWED EMERGENCY PROCEDURE AND SHUT ENGINE DOWN AND PERFORMED RUN-ON LANDING. UPON INSPECTION OF CHIP DETECTOR FOUND CATEGORY 1 SLUDGE TYPE MATERIAL. PERFORMED PENALTY RUN WITH NO DEFECTS NOTED.SDR BHHR201710030001Drive Gear · spalledA TEAR-DOWN INSPECTION OF A 250-C20B ENGINE GEARBOX WAS PERFORMED. THIS GEARBOX WAS REMOVED FROM SERVICE DUE TO CHIP LIGHTS AND AN AUDIBLE WHINE HEARD OVER THE RUNNING AIRCRAFT. THIS GEARBOX WAS ASSEMBLED IN-HOUSE AFTER A 3500 HOUR OVERHAUL INSPECTION OF THSDR BHHR201710030002Gear · spalledENGINE WAS REMOVED FROM SERVICE DUE TO CHIP LIGHTS AND AN AUDIBLE WHINE HEARD OVER THE RUNNING AIRCRAFT. THIS GEARBOX WAS ASSEMBLED IN-HOUSE AFTER A 3500 HOUR OVERHAUL INSPECTION OF THE GEARS WAS PERFORMED AN AUTHORIZED REPAIR FACILITY. PTO GEAR SHOWED SIGSDR 2017F00107Bearing · failedENGINE CHIP LIGHT CAME ON, TURBINE WAS INSPECTED AND THE NR 5 BEARING WAS FOUND TO BE THE CAUSE OF METAL GENERATION.SDR 2017FA0000000Compressor · damagedPILOT REPORTED TURBINE OUTLET TEMPERATURE INCREASE AT END OF FLIGHT. MAINTENANCE DISCOVERED COMPRESSOR BLADES DAMAGED BY UNKNOWN FOD.SDR 2016FA0000632Drive Assy · crackedDRIVE BODY WAS FOUND CRACKED DURING OVERHAUL.SDR 2016FA0000537Fuel Control · leakingDURING A POST FLIGHT INSPECTION MAINTENANCE FOUND A SMALL FUEL LEAK AT THE OUT FITTING LOCATION ON THE ENGINE FUEL CONTROL UNIT. THE UNIT WAS REPLACED WITH A SERVICEABLE UNIT.SDR QMLA2016071816076Warning System · false activationAFTER TAKEOFF, THE PILOT SAW A TRANSMISSION CHIP LIGHT ILLUMINATE. HE IMMEDIATELY RETURNED TO BASE AND CALLED THE MECHANIC ON DUTY. THE MECHANIC ARRIVED TO TROUBLESHOOT. HE DRAINED AND FLUSHED THE TRANSMISSION, CHANGED THE FILTER, CHECKED AND CLEANED ALL 3 SDR DCGA2016071800332Blade · delaminatedFOUND DELAMINATION ON MAIN ROTOR BLADE STAINLESS STEEL LEADING EDGE.SDR K2DA20160707146Bearing · spalledAIRCRAFT PERFORMED A PRECAUTIONARY LANDING FOR AN ENGINE CHIP LIGHT WHILE CONDUCTING AN AIR TOUR. THERE WERE NO SECONDARY INDICATIONS AND THE AIRCRAFT LANDED SAFELY. AFTER CLEARING THE CHIP LIGHT IAW THE MANUAL, THE AIRCRAFT WAS FLOWN BACK TO BASE. IT WAS DSDR K2D2016F00002Bearing · damagedTHE COMPRESSOR WAS REMOVED FROM THE ENGINE GEARBOX AND IT WAS DISCOVERED THAT THE COMPRESSOR SPUR ADAPTER GEARSHAFT JOURNAL HAD A WORN AREA WHERE METAL WAS REMOVED. AFTER INSPECTION OF THE GEARBOX, IT WAS DETERMINED THAT THE 2.5 BEARING HAD FAILED AND WAS THESDR 2016FA0000284Bearing · spalledTHE ENGINE WAS REMOVED FOR CHIPS IN THE OIL. THE SOURCE WAS FOUND TO BE THE NR 5 BEARING, PN M250-10106, SN NWL13-0863.SDR HDNA201604270001Compressor · making metalWHILE ON BASE FINAL FOR TAXIWAY, THE NR 1 ENG OIL PRESS STARTED FLUCTUATING WITH OIL TEMPERATURE NORMAL & TORQUES MATCHED. AT SHORT FINAL THE ENG CHIP CAUTION LIGHT ILLUMINATED, SIDE STEPPED THE RAMP & LANDED 100 YARDS SHORT OF NORMAL LANDING AREA. SHUTDOWN SDR 8MHR201604110001Turbine Wheel · fracturedFOUND A PIECE OF THE FOURTH STAGE TURBINE WHEEL BLADE AND SHROUD MISSING.
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