Allison 250-C20
Service difficulty reports · 945
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 = '250C20' 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 = '250C20' 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 2026FA0000472Lock Nut · failedMS20143 NUTS ARE UTILIZED TO SECURE WITHIN THE ENGINE ASSEMBLY THE FOLLOWING ARTICLES COMPRESSOR, TURBINE, FUEL CONTROL, GOVERNOR, FUEL PUMP, TACH GENERATORS, GEARBOX SPLIT LINE, AND HAVE BEEN FOUND NUMEROUS OCCASIONS BACKING OFF. THE MS21043 NUTS HAVE BEEN RSDR EVCA07192021Control Unit · malfunctionedRECENTLY INSTALLED SYSTEM TRUE BLUE BATTERY WAS GETTING A RED TEMP HOT CAUTION LIGHT FOR THE AIRCRAFT BATTERY WHEN THE STARTER BUTTON WAS PRESSED. THE BATTERY WOULD NOT PHYSICALLY BE HOT BUT THE TEMP LIGHT WOULD ILLUMINATE ABOVE 3% N1 AND EXTINGUISH BELOW 3% NSDR QMLA2020052820022Duct · looseDURING CRUISE FLIGHT, CREW AND PATIENT COMPLAINED OF CARBON MONOXIDE POISONING SYMPTOMS INCLUDING LIGHT HEADEDNESS, SLEEPINESS AND HEADACHE. HEATER WAS IN OFF POSITION, BOTH SWITCHES, BUT HEAT AND FUMES WERE COMING FROM HEATER VENT IN AFT COMPARTMENT OF AIRCRASDR QMLA2019112299087Engine · making metalDURING ROUTINE INSPECTION OF ENGINE CHIP DETECTORS FOUND NUMEROUS CHIPS AND DEBRIS ON BOTH UPPER AND LOWER CHIP PLUGS. AMOUNT AND SIZE EXCEEDED ALLOWABLE PER ROLLS ROYCE C47-250 EMM. *** THIS AIRCRAFT REMAINS OOS AT THE TIME OF THIS SUBMISSION TO REPLACE THIS SDR CA190716009Gyro · faulty(CAN) IT WAS REPORTED TO BELL:SHORTLY AFTER TAKEOFF, SMOKE STARTED TO FILL THE COCKPIT. THE PILOT TURNED OFF THE BATTERY, OPENED THE SIDE WINDOW, AND MADE AN EMERGENCY LANDING BACK AT THE POINT OF DEPARTURE. ONCE ALL ELECTRICAL POWER HAD BEEN TURNED OFF, INCLUSDR 2019FA0000194Engine · making metalENGINE CHIP LIGHT ILLUMINATED WHEN ENGINE WAS BROUGHT TO FLIGHT IDLE AFTER ENGINE START UP. MAINTENANCE FOUND 2 FLAKES WITHIN LIMITS ON THE UPPER CHIP PLUG.A 30 MINUTE GROUND RUN WAS PERFORMED, THE PLUGS WERE INSPECTED AGAIN AND FOUND CLEAN. AIRCRAFT RETURNED SDR CA190409008Blade · mismanufactured(CAN) UPON INSTALLATION OF A SET OF NEW MAIN ROTOR BLADES IT WAS DISCOVERED THE ALIGNMENT PIN WAS MISSING FROM ONE OF THE NEW BLADES. PART NUMBER 206-010-200-151 AND COULD NOT BE INSTALLED ONTO THE AIRCRAFT. AFTER CONTACTING THE BELL TECHNICAL REP. HE THEN DIRSDR X2RA2018F00000Fuel Control · failedPILOT EXPERIENCED DELAYED HOT AND ERRATIC STARTS. FOUND PLAY IN THE POINTER ROD, THIS WOULD AFFECT THE START SCHEDULING. THE SLOP IS WHERE THE POINTER ROD ENGAGES THE THROTTLE ARM. AT TIMES THE THROTTLE SEEMED AS IF IT WERE HITTING A STOP. FIRST START OK, SDR HDNA20160917012Engine · making metalAT CRUISE, THE MAG PLUG 2 WARNING LIGHT ILLUMINATED. REDUCED POWER TO ESTABLISH A SUITABLE OEI CONDITION AND CALLED FOR THE APPLICABLE RFM EMERGENCY PROCEDURE CHECKLIST. AN ATTEMPT WAS MADE TO EXTINGUISH THE WARNING LIGHT WITH NO SUCCESS. PERFORMED A SINGLE ENSDR K2DA20160308001Blade · delaminatedUPON THE DAILY INSPECTION, A COIN TAP TEST WAS PERFORMED ON THE TAIL ROTOR BLADES. TAIL ROTOR BLADE, PN 500P3100-105, SN C519 WAS DISCOVERED TO BE DELAMINATED. THE DELAMINATION CONSISTS OF A 1.5 INCH AREA OF THE LE ABRASION STRIP ON THE OTBD SIDE OF THE BLADSDR 9EK2016F00000B-Nut · looseFOUND B-NUT LOOSE ON ENGINE THAT ATTACHES RETURN OIL LINE TO RESERVOIR. LINE DOES NOT HAVE ANY SAFETYING PROVISION. METAL FITTING ASSY WAS FOUND LOOSE NOT HOSE.SDR 2016FA0000076Blade · delaminatedUPON THE DAILY INSPECTION, A COIN TAP TEST WAS PERFORMED ON THE TAIL ROTOR BLADES AND BLADE WAS DISCOVERED TO BE DELAMINATED. THE DELAMINATION CONSISTS OF A 2" AREA OF THE L/E ABRASION STRIP ON THE OTBD SIDE OF THE BLADE AND A 1" AREA OF THE L/E ABRASION STRISDR K2DA20160107001Blade · delaminatedDURING DAILY INSPECTION, AFTER THE DAYS FLIGHTS, ONE OF THE TAIL ROTOR BLADES WAS FOUND TO HAVE VARIOUS SPOTS, VARYING IN LENGTH FROM .5 INCHES TO 2 INCHES, WHERE THE LE WAS DELAMINATING FROM THE BLADE, PN 500P3100-105, SN C700. WE TAP TEST THE LE DAILY.SDR DCGA2015FA0000622Engine · making metalPILOT GOT AN INTERMITTENT ENGINE CHIP LIGHT INDICATION AFTER TAKEOFF AND RETURNED FOR LANDING. MAINTENANCE FOUND LIGHT EXTINGUISHED BUT FOUND METAL ON UPPER AND LOWER ENGINE CHIP PLUGS. ENGINE WAS REMOVED FROM THE ACFT FOR FURTHER INSPECTION.SDR 8MHR2015FA0000422Nozzle · fracturedENGINE WAS REPORTED TO HAVE N1 LOCKUP. ON DISASSEMBLY OF THE TURBINE, FOUND 6 OF THE 8 LOCATING TANGS SEPARATED FROM THE SECOND STAGE NOZZLE.SDR QMLA2015081415072Skin · crackedFOUND CRACK IN UPPER AFT FUSELAGE SKIN NEAR THE UPPER LT LONGERON AS DESCRIBED, THE SUBJECT OF AD2015-05-04 & ASB 407-11-95, TB 407-12-96. DURING THE COMPLIANCE WITH AMC EO-13-5310-EO-212. CRACK IS APPROX 1.5" LONG, STARTING AT THE UPPER LT LONGERON & TRAVELSDR ALGA0730201536129Bearing · wornDURING CRUISE FLIGHT ENGINE CHIP LIGHT ILLUMINATED. LANDED ON AN OFFSHORE PLATFORM, EXAMINED CHIP PLUG FOUND METAL PARTICLES. UPON RECOVERY OF AIRCRAFT & SUBSEQUENT TEAR DOWN OF ENGINE, THE NATURE OF THE PROBLEM WAS DETERMINED TO BE THE NUMBER FIVE BEARING ISDR K2DA20150602001Pump · failedDURING CRUISE FLIGHT THE MAIN ROTOR TRANSMISSION LOW OIL PRESS LIGHT ELIMINATED. AN UNSCHEDULED PRECAUTIONARY LANDING WAS MADE IN AN OPEN FIELD WITHOUT INCIDENT. FOLLOWED MM TROUBLESHOOTING PROCEDURES & FOUND THE MAIN ROTOR TRANSMISSION OIL PUMP FAULTY. REPSDR K2DA2015FA0000256Pump · failedDURING CRUISE FLIGHT, THE MAIN ROTOR TRANSMISSION LOW OIL PRESSURE LIGHT ELIMINATED. AN UNSCHEDULED PRECAUTIONARY LANDING WAS MADE IN AN OPEN FIELD WITHOUT INCIDENT. FOLLOWED MM TROUBLE SHOOTING PROCEDURES AND FOUND THE MAIN ROTOR TRANSMISSION OIL PUMP FAULTSDR DCGA2015FA0000217Turbine · out of tolerancePILOT REPORTED CHIRPING NOISE FROM ENGINE AT END OF DAY SHUTDOWN. MAINTENANCE REMOVED TURBINE ASSY FOR SUSPECT N2 RUBBING.SDR QMLA2015041515029Heater · pilot errorFLIGHT CREW SMELLED HOT PLASTIC IN AFT CABIN AREA WHILE HEATER WAS IN USE. THIS IS AN ELECTRICALLY ACTUATED SYS, OPERATED BY THE PILOT. IF PILOT SELECTED SETTINGS ARE TOO HIGH, THE HEATER CAN RUN VERY HOT TO THE AFT CABIN, SEPARATELY FROM THE COCKPIT, THIS WSDR HDNA201502190004Engine · making metalON STARTUP NR 1 ENG CHIP LIGHT ILLUMINATED. UPON INSPECTION OF CHIP DETECTORS FOUND UPPER DETECTOR TO HAVE EXCESSIVE AMOUNTS OF METAL. R & R TURBINE.SDR 2015FA0000049Scissors · unserviceableINSTALLED THE O/H SCISSORS LINK AND WAS NOTIFIED BY THE CUSTOMER THAT ON A ROUTINE ALF CHECKS, ON THE ROTATING SCISSORS LINK THAT ABLE ENGINEERING HAD RE-BUSHED AND REFINISHED AT CONSIDERABLE COST AND DELAY, THE UPPER ATTACHMENT TO MAST FITTING EXHIBITED SOME SDR 2015FA0000003Bladder · leakingSMALL PUDDLE OF FUEL FOUND ON THE GROUND UNDER THE BELLY OF THE ACFT AT PREFLIGHT. MAINTENANCE FOUND A SMALL PUNCTURE IN THE RT FUEL BLADDER OF AN UNCONFIRMED ORIGIN.SDR FTYRN201410180001Combustion Case · crackedNOTED A HIGH TOT INDICATION ON APPROACH TO LAND AT HOME STATION. VISUALLY INSPECTED AND FOUND CRACK IN OUTER COMBUSTION CASE ASSEMBLY.SDR CA140903012Bearing · rough(CAN) AFTER LANDING AND DURING ENGINE WIND DOWN, A LOUD SQUEAL WAS HEARD COMING FROM THE AFT OF THE HELICOPTER. IT WAS DETERMINED THAT THE NOISE WAS EMANATING FROM THE TAIL ROTOR PITCH CONTROL BEARINGS. THE TAIL ROTOR PITCH CONTROL LINKS WERE DISCONNECTED ANSDR K2DA20140701001Pressure Switch · faultyMAIN ROTOR TRANSMISSION LOW OIL PRESS LIGHT ILLUMINATED IN FLIGHT PREFORMED PRECAUTIONARY LANDING. TRANSMISSION OIL PRESS SWITCH INOPERATIVE. REPLACED PRESS SWITCH RAN ENG, OPERATIONS CHECKED GOOD & LEAK CHECKED GOOD, RETURNED TO SERVICE.SDR IAVA201406110001Combustion Case · crackedOUTER COMBUSTION CASE CRACKED ON THE RT SIDE UNDER WIRE REINFORCEMENT PATCH.SDR K2DA20140427001Shaft · wornTRANSMISSION OIL PRESS LIGHT DURING FLIGHT. PRECAUTIONARY LANDING PREFORMED. TRANSMISSION OIL PUMP INPUT SHAFT NOT PROPERLY SEATED & WORN. REPLACED INPUT SHAFT PN 10807-2 IAW MD CSP-COM-5 CH 63-20-25. PERFORMED GND RUN & LEAK CHECK. RETURNED TO SERVICE.SDR DCGA2014042500280Wire · shortedPILOT REPORTED AN ENGINE CHIP LIGHT. THE CHIP LIGHT WAS EXTINGUISHED WHEN CHIP PLUGS WERE REMOVED AND CLEANED. DURING OPS CHECKS THE LIGHT CAME BACK ON. MAINTENANCE ULTIMATELY DISCOVERED A SHORTING WIRE IN THE LOWER ENGINE CHIP DETECTOR CONNECTOR. THE BAD PSDR WO5A2014042100261Bearing · failedOPERATOR EXPERIENCED ERRATIC ENGINE OPERATION INCLUDING INABILITY TO LIGHT OFF AS WELL AS UNCOMMANDED INCREASES IN N2 & NR SPEEDS. PILOT REPORTED THAT DURING LANDING FROM A HOVER TAXI, NOTICED N2 AND NR RISING AND ROLLED THE THROTTLE TO IDLE AT WHICH TIME THESDR CA130812003Blade · damaged(CAN) IN CRUISE FLIGHT THE PILOT NOTICED A CHANGE IN BLADE NOISE, LIKE PLASTIC BAG ON BLADE, WAS APPROXIMATELY 1 MILE FROM THE BASE, SHUTDOWN THE ACFT, AND CHECKED THE BLADES, FOUND YELLOW MAIN-ROTOR BLADE, SN A-7716 TIP CAP NOT FLUSH WITH THE BLADE, BUT THE SDR CA130612006Ecu · failed(CAN) 11 PM LOCAL TIME. THE PILOT MADE A NORMAL OUTBOUND FLIGHT AND SHUTDOWN AT A TRAUMA SCENE. 5 MINUTES INTO A 10 MINUTE RETURN FLIGHT THE FADEC DEGRADE LIGHT, AUTO RELIGHT LIGHT CAME ON WITH ALL OTHER INDICATIONS NORMAL FADEC REMAINED IN AUTO MODE. THE PISDR CA130509006Elt · failed(CAN) ELT FAILED POWER OUTPUT TEST FOR 121.5 MHZ AND 406 MHZ. UNIT FLASHED CODE INDICATING LO RF POWER. POWER CONFIRMED WITH BEACON TEST EQUIPMENT. ELT BATTERY DUE 01/2015.SDR JBZA20130513003Blade · damagedWHILE ENROUTE, ACFT HAD A BIRD STRIKE AT THE MAIN ROTOR SYS CAUSING A VIBRATION. CREW MADE A PRECAUTIONARY LANDING AT THE NEAREST AIRPORT. AFTER SHUTDOWN, PILOT INSPECTED THE ACFT AND FOUND 1 OF THE MAIN ROTOR-BLADES DAMAGED AT THE TIP OF THE BLADE FROM THE TSDR CA130502011Gearbox · making metal(CAN) ENGINE GEARBOX WAS O/H 7.6 HRS IN SERVICE AND THE PILOT REPORTED AN ENGINE CHIP LIGHT. UPON FURTHER INVESTIGATION OF THE CHIP PLUG, IT APPEARS TO BE A DRILL BIT THAT WAS LEFT IN THE GEARBOX DURING THE O/H PROCESS. IN THE PROCESS OF CHANGING THE ENGINE SDR AQH2013F00000Starter Gen · failedDURING NORMAL FLIGHT, THE PILOT REPORTED THE GENERATOR FAILED. THE HELICOPTER LANDED WITHOUT INCIDENT. SUBSEQUENT INVESTIGATION BY THE PILOT INDICATED THE STARTER GENERATOR WAS NOT TURNING WHEN THE ENGINE WAS ROTATED. UPON REMOVAL IT WAS VERIFIED THE STARTESDR 2013FA0000553Bulkhead · crackedBULKHEAD CRACKED IN LT AFT GEARBOX ATTACHMENT HOLE. CRACKING FOUND VISUALLY DURING CORROSION INSPECTION.SDR CA130110005Governor · malfunctioned(CAN) PREFLIGHT INSPECTION OF ACFT REVEALED GOVERNOR BIASING SHAFT, PN 206-062-717-1, ON TRANSMISSION DECK TWISTED AT SHEAR POINT. LINEAR ACTUATOR ARM REMOVED AT GOVERNOR ARM, PN 206-061-107-3, TO INSPECT FOR BINDING. GOVERNOR ARM/SHAFT SEIZED. SERVICEABLE BSDR CA130109010Housing · failed(CAN) THE BEARING HOUSING WAS REMOVED FROM COMPRESSOR ASSEMBLY DUE TO LOW POWER, AND WAS INDUCTED INTO THE SHOP. BEARING HOUSING AND NUT, WITH SHEARED PORTION OF THREADED STUD. THE SMALL LINE OF CLEAN METAL CAN BE SEEN, AND THAT IS ALL THAT EXISTED TO RETASDR 2013FA0000552Bulkhead · crackedBULKHEAD CRACKED IN LT AFT GEARBOX ATTACHMENT HOLE. CRACKING WAS FOUND VISUALLY DURING CORROSION INSPECTION.SDR CA121205011Elt · malfunctioned(CAN) DURING THE SELF TEST OF THE ELT USING THE REMOTE SWITCH THE SYSTEM RESPONDED WITH AN ERROR CODE OF 3+2 FLASHES INDICATING A LOW RF POWER FAULT. FAULT WAS CONFIRMED DURING BENCH TEST. THE ELT WAS LAST RECERTIFIED JUNE 06, 2012 AND HAD FLOWN 195.7 HOURS SDR CA121203008Heater · shorted(CAN) SHROUD HEATER NOT WORKING. HEATER CIRCUIT BREAKER TRIPPED. HEATER MOTOR ROUGH TO TURN AND SHORTING OUT INTERNALLY. MOTOR REPLACED.SDR CA121023008Encoder · failed(CAN) ATC REPORTED THAT ACFT WAS NOT REPORTING MODE C. INSPECTION OF ENCODER FOUND WATER ON THE CIRCUIT BOARD WHICH LEAD TO A SHORT. ENCODER REPLACED. MAINTENANCE PERSONNEL WILL INSPECT ACFT FOR ENTRY SOURCE OF WATER.SDR CA121010010Pin · failed(CAN) WHILE DOING PREFLIGHT CHECKS FOR A TRAINING FLIGHT WITH DUAL PILOTS AND DUAL CONTROLS INSTALLED, TRAINING PILOT WAS IN THE LT SEAT DURING START-UP. ONCE AT IDLE, THE PILOT IN THE LT SEAT ADJUSTED HIS SITTING POSITION, PUSHING HIMSELF BACKWARDS WHILE APPLSDR CA120905008Drive Shaft · overtemp(CAN) DURING 100 HR INSPECTION THE DRIVESHAFT TELI-TEMP INDICATORS SHOWED DRIVESHAFT COUPLING WAS OVERTEMPED. DRIVESHAFT RAN 151 HOURS SINCE LAST O/H.SDR CA120905010Starter Gen · noisy(CAN) NOISE IN ACFT AUDIO SYS WHEN STARTER GENERATOR SWITCHED ON. STARTER GENERATOR REPLACED.SDR K2DA201209070502Engine · warning lightENGINE CHIP LIGHT ILLUMINATED DURING FLIGHT. PRECAUTIONARY LANDING PERFORMED AND ENGINE SHUTDOWN. MX DISPATCHED WITH COMPANY ACFT AND PASSENGERS WERE FLOWN FOR CONTINUATION OF THE FLIGHT. CHIP DETECTORS SHOWED METAL PARTICLES ON THE LOWER CHIP PLUG OF MEDIUSDR CA120905012Fuel Control · failed(CAN) DURING START, ALL NRS AND TEMPERATURES WERE NORMAL AT 40 PERCENT N1 ENGINE FLAMED OUT AS IF FUEL WAS CUTOFF. FUEL CONTROL REPLACED.SDR CA120905009Governor · malfunctioned(CAN) GOVERNOR WILL NOT RECOVER FROM OVERSPEED WHEN COLLECTIVE DECREASED.
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