Allison 250-C30
Service difficulty reports · 402
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 = '250C30' 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 = '250C30' 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 HEEA078703Bearing · failedREMOVED DUE TO ENGINE RAN WITH LOW OIL PRESSURE. NR 3 AND 4 BEARING FAILURE.SDR HEEA078904Plenum · crackedPLENUM CRACKED.SDR HEEA078905Plenum · crackedPLENUM CRACKED.SDR 2002F00459Housing · crackedDURING INSPECTION FOUND TAIL ROTOR PITCH CHANGE LINK OUTBOARD BEARING HOUSING CRACKED. CRACK PROPAGATED FROM ROLL STAKE AREA OF ONE SIDE OF BEARING THROUGH OUTBOARD END OF PITCH CHANGE LINK TO THE OTHER SIDE AT OPPOSITE ROLL STAKE AREA. SUSPECTED CAUSES ARE SDR HEEA078875Wire Harness · brokenBREAK IN CABLE CAUSING FADEC NG1 FAULT AND NG1 CONTINUITY FAULT. BREAK IS APPROXIMATELY 3 INCHES FROM ECU CONNECTOR PLUG.SDR HEEA078805Bleed Valve · malfunctionedENGINE POWER OSCILLATIONS AT HIGH POWER SETTINGS. REPLACED WITH SERVICEABLE BLEED VALVE.SDR HEEA078806Valve · inoperativeVALVE INOPERATIVE. REPLACED WITH SERVICEABLE VALVE.SDR HEEA078807Valve · stuckVALVE STUCK IN ON POSITION. REPLACED WITH SERVICEABLE VALVE.SDR HEEA078808Sensor · malfunctionedSENSOR PICKUP CAUSING NP1, NP1 RATE, OS, NPOS AND NPD FAULTS TO FADED SYSTEM. REPLACED WITH SERVICEABLE SENSOR PICKUP ASSY.SDR HEEA078809Hose · kinkedFIRE SHIELD TO FUEL NOZZLE HOSE KINKED. REPLACED WITH SERVICEABLE HOSE.SDR HEEA078810Line · leakingFUEL LINE LEAKING. REPLACED WITH SERVICEABLE LINE.SDR HEEA078811Igniter Box · weakIGNITOR BOX WEAK.SDR HEEA078815Hmu · failedHMU HAS METERING VALVE CIRCUIT FAULT. REPLACED WITH SERVICEABLE HMU.SDR HEEA078843Bearing · wornBEARINGS WORN.SDR HEEA078535Element · bypassingFACET FILTER IN BYPASS CONDITION. REPLACED FILTER.SDR HEEA078536Element · bypassingFACET FILTER IN BYPASS CONDITION. SCRAPPED AND REPLACED FILTER.SDR R7M2002F00036Battery · dischargedLEAD ACID BATTERY WOULD NOT HOLD CHARGE. UNIT SCRAPPED ON SITE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.SDR CA020123004Shaft · sheared(CAN) INFLIGHT INDICATION OF PRESSURE LOSS NR 1 SYSTEM. INSPECTION REVEALED PUMP SHAFT SHEARED AND BRASS PARTICLES IN FILTER.SDR AC2A077543Governor · malfunctionedGOVERNOR VERY SENSITIVE, COULD NOT MATCH TORQUES & SHAFT IS RACHETY. REPLACED WITH SERVICEABLE PART.SDR 2002FA0000299Governor · inoperativeVERY SENSITIVE, COULD NOT MATCH TORQUES AND SHAFT IS RACHETY. REPLACED WITH SERVICEABLE PART.SDR AUS20011350Blade · cracked(AUS) MAIN ROTOR BLADE CRACKED.SDR HEEA077009Bleed Valve · failedHIGH MGT. REPLACED WITH SERVICEABLE BLEED VALVE.SDR AC22001F00006Exhaust Stack · crackedEXHAUST ASSEMBLY, CRACKED. REPLACED WITH NEW EXHAUST STACK.SDR AC22001F00005Valve · failedVALVE, RETURNING PART FOR WARRANTY CREDIT DUE TO IT FAILING AFTER ONLY 234 HOURS.SDR ALG2001F00032Relay · faultyDURING PRESTART CHECK OF THE ENGINE FIRE EXTINGUISHING SYSTEM. BOTTLE FIRED DURING TEST, RELAY COIL WAS FOUND FAULTY.SDR ALG2001F00028Blade · corrodedTURBINE TIME CHANGE DUE 1ST AND 2ND STAGE WHEELS, CYCLED OUT. TURBINE HAD A MFG LINER INSTALLED. REMOVED COMBUSTION SECTION AND FOUND SULFIDATION ON NR 1 WHEEL BLADES. (K)SDR ALG2001F00035Disc Pack · crackedON TAIL ROTOR DRIVESHAFT, DURING 25 HOUR AD INSPECTION, CRACKED DISC.SDR HEEA076453Bleed Valve · malfunctionedHIGH TOT, DIDN'T CLOSE SMOOTHLY WHEN PRESSURE WAS APPLIED. REPLACED WITH SERVICEABLE BLEED VALVE.SDR HEEA076454Line · crackedLINE IS CRACKED AT FLARE. REPLACED WITH SERVICEABLE LINE.SDR HEEA076455Solenoid Valve · stuckSTICKS INTERMITTENTLY. REPLACED WITH SOLENOID VALVE.SDR HEEA076457Governor · malfunctionedN2 DROOP TO 97 PERCENT. COMPLETED DROOP COMPENSATION ADJUSTMENTS AND COMPLETED OPERATIONAL CHECK. FOUND ACCEPTABLE. AFTER 2:45 ADDITIONAL FLIGHT HOURS REPORTED N2 DROOP TO 97 PERCENT WITH N2 OVERSPEED TO 102 PERCENT. REPLACED WITH SERVICEABLE GOVERNOR.SDR ALG2001F00031Spar · corrodedDISCOVERED DURING ROUTINE MAINTENANCE INSPECTION. SPAR EXFOLIATION WAS DETECTED ON LOWER SURFACE SKIN/SPAR SPLICE JOINT, CONSIDERED A MATERIAL DEFECT. BLADE WAS REMOVED FROM SERVICE AND SCRAPPED.SDR AUS20011399Web · cracked(AUS) COPILOTS SEAT WEB CRACKED.SDR ALG2001F00025Engine · making metalDURING RUN UP NR 2 ENGINE CHIP LIGHT ILLUMINATED. METAL SAW FOUND IN OIL SYSTEM CHIP PLUGS. ENGINE WAS REMOVED AND REPLACE.SDR HEEA075551Solenoid · stuckSTUCK OPEN CAUSING HIGH T.O.T. REPLACED WITH SERVICEABLE PART.SDR HEEA075554Fuel Control · malfunctionedUNABLE TO ADJUST START TEMP. LOW ENOUGH TO GET ENG. STARTED. START MODE FUEL FLOW APPROX. 3 TIMES ALLISON LIMITS. FOUND FLOWS 12PPH HIGH. (METERING VALVE SHIFTED), RECALIBRATED AND TESTED OK.SDR HEEA075555Governor · malfunctionedUNABLE TO CORRECT OVERSPEED. FOUND GOVERNOR BREAK RESPONDED 100 RPM EARLY. TESTED SATISFACTORY.SDR HEEA075556Fuel Control · malfunctionedENGINE WOULD NOT ACCELERATE ON START, ADJUSTING START DERICHMENT AND START ACCELERATION TO MAXIMUM HAD NO EFFECT. FOUND PRESSURIZING VALVE TO BE STICKING. REMOVED VALVE AND POLISHED. VALVE WOULD STILL HANG UP. REPLACED VALVE AND UNIT TESTED SATISFACTORY.SDR HEEA075557Fuel Control · malfunctionedSTART ACCEL ADJUSTMENT FROZEN. REPLACED WITH SERVICEABLE FUEL CONTROL.SDR 2002FA0000029Pitch Horn · crackedCRACK FOUND ON MAIN ROTOR GRIP AT BOLT HOLE WHERE GRIP ATTACHES TO PITCH HORN. CRACK EXTENDED FROM BOLT HOLE FOR 1.5 FEET TO OUTSIDE OF GRIP.SDR J8O2001F00000Bearing · damagedTRANSMISSION REMOVED FOR METAL ON CHIP DETECTORS. ON DISASSEMBLY IT WAS DISCOVERED THE DUPLEX BEARING PN 206-040-032-105 OUTER RACE WAS SPALLING AND 3 BALL BEARINGS HAD COME APART.SDR AUS20010640Relay · failed(AUS) GENERATOR LINE CONTACT RELAY FAULTY.SDR AU010382Shaft · cracked(AUS) ENGINE GEARBOX POWER TAKEOFF SHAFT CRACKED. SUSPECT CAUSED BY OVERTIGHTENING OF THE POWER OUTPUT ADAPTER.SDR 20010517CW010Yoke · mismanufacturedAN ATTEMPT WAS MADE TO INSTALL THE NEW TAIL ROTOR HUB AND BLADE ASSEMBLY ON THE AIRCRAFT AND THE FLAPING ANGLE COULD NOT BE ADJUSTED. ON INSPECTION IT WAS FOUND THAT THE YOKE ASSEMBLY WAS MACHINED 90 DEGREES TO WHERE THE CUTOUTS THAT ALLOW THE FLAPPING. THE SDR 20010511CW007Gearbox · failedUPON SHUT DOWN, THE PILOT AND MECH NOTICE AN ODD NOISE COMING FROM THE TAIR ROTOR ACCOMPANIED BY A SLIGHT VIBRATION. AIRCRAFT WAS DUE FOR A 100 HR INSPECTION, SO T/R OIL WAS DRAINED AGAIN. THE CHIP PLUG HAD NO CHIPS BUT DID HAVE A BLACK PASTE. PASTE WAS EXASDR CA010504004Shaft · broken(CAN) - METAL GENERATION, SCHEDULED 100 HOUR INSPECTION.- GEARBOX REMOVED AND SENT FOR REPAIR. - TEARDOWN INSPECTION FOUND THAT THE INPUT GEARSHAFT HAD FAILED INBOARD OF THE INPUT GEAR.- THIS GEARBOX HAD BEEN REPAIRED ON 3 PREVIOUS OCCASIONS FOR CLOUDY OIL/SLUSDR HEEA072662Filter · leakingLEAKING.SDR HEEA072606Igniter · malfunctionedAIRCRAFT HAS DELAYED LIGHT OFF AFTER ENGINE WASH. REPLACED WITH SERVICEABLE IGNITER.SDR HEEA072535Element · bypassingBYPASSED EARLY. SCRAPPED LOCALLY AND REPLACED WITH NEW FILTER.SDR HEEA072564Lead · shortedONE OF THE FOUR TANGS ON B RECEPTACLE END BROKEN.
Back to Allison 250-C30