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 CA030405001Bearing · spalled(CAN) GEARBOX RECEIVED FROM A CUSTOMER IN THE USA. RT INPUT SPLIT INNER RACE BEARING PEELING/SPALLING. METAL CONTAMINATION CAUSED DAMAGE TO OTHER INTERNAL BEARINGS.SDR CA030404001Combust Chamber · cracked(CAN) WHILE IN CRUISE FLIGHT THE PILOT NOTICED NR 2 ENGINE TOT WAS HIGHER THAN THAT OF NR 1 ENGINE. PILOT ATTEMPTED TO CARRY OUT A POWER CHECK ON NR 2 ENGINE BUT WAS UNABLE TO COMPLETE THE CHECK DUE TO TOT REACHING RED LINE.AIRCRAFT RETURNED TO BASE AND THE AMSDR HDN2003F00000Transmitter · inoperativeWHEN ENGINE OIL PRESSURE TRANSMITTER IS INSTALLED ON AIRCRAFT, PORT WAS INOPERATIVE, THE PRESSURE GAUGE WENT TO THE RED ON THE GAUGE. (REG NR CHANGED FROM 911VH TO 105SE RESERVED N-NUMBER)SDR HDN2003F00001Transmitter · inoperativeINSTALLED NEW PART, INOPERATIVE NEEDLE ON GAUGE, STILL WENT TO RED LIMIT. (HDNA610E) (REG NR CHANGED FROM 911VH TO 105SE RESERVED N-NUMBER)SDR HDN2003F00002Transmitter · inoperativeINSTALLED NEW PART, INOPERATIVE NEEDLE ON GAUGE WENT TO THE RED LIMIT. (REG NR CHANGED FROM 911VH TO 105SE RESERVED N-NUMBER).SDR CA030327004Bearing · spalled(CAN) RT INPUT SPLIT INNER RACE BALL BEARING PEELING/SPALLING.VOLUME OF METAL CONTAMINATION CAUSED COLLATERAL DAMAGE TO ALL OTHER INTERNAL BEARINGS AND COMPONENTS.SDR CA030321006Stud · loose(CAN) A STUD BACKED OUT OF THE ENGINE GEARBOX AND SUBSEQUENTLY MADE CONTACT WITH A ROTATING BOLT THAT SECURES THE TRANSMISSION DRIVE SHAFT WITH THE ENGINE STUB SHAFT. NO DAMAGE RESULTED IN THIS OCCURENCE, HOWEVER THE POTENTIAL HAZARD OF A ROTATING PART CONTACTSDR CA030314003Line · wrong part(CAN) DURING AN UNSCHEDULED INSPECTION IN FORWARD TRANSMISSION DECK AREA, IT WAS DISCOVERED THAT A HYDRAULIC PRESSURE LINE FROM PUMP TO FILTER HOUSING APPEARED TO BE STRESSED AT HYDRAULIC FILTER FITTING. IT WAS REVEALED UPON INVESTIGATION OF HOSE ASSY, P/N WASDR BAQ2003F00000Gearbox · making metalTHE ENGINE WITH SUBJECT GEARBOX STARTED MAKING METAL ON MAINTENANCE RUNS AFTER ENGINE INSTALLATION. METAL FOUND ON GEARBOX CHIP PLUG. AFTER OPENING UP GEARBOX, FOUND UNIDENTIFIED METAL RING INSIDE. NO VISIBLE SIGN OF DAMAGE TO GEAR TRAIN. RETURNED GEARBOX,SDR AUS20030266Liner · cracked(AUS) ENGINE COMBUSTION LINER FAULTY. THE LINER WAS NOT CLEAN SO IT WOULD HAVE BEEN DIFFICULT TO ASCERTAIN SERVICEABILITY A POSSIBLE CRACKED WELD APPROXIMATELY 75MM (2.95IN) LONG RUNNING FROM THE 6 O'CLOCK TO THE 8 O'CLOCK POSITION. ONE CRACK APPROXIMATELY SDR AC2A084861Governor · damagedPOTTING COMPOUND BROKEN ON THE DRIVE SPLINE END. GOVERNOR WAS REPLACED.SDR CA030217001Fitting · cracked(CAN) CRACKS FROM RIVIT HOLE IN 0.125 INCH STAMPED ATTACHMENT FLANGE COMPLETELY ACROSS FLANGE SEPARATING IT INTO TWO PIECES. (NOTE) THERE IS NO DANGER OF STABILIZER SEPARATION FROM THE AIRCRAFT AS THE FLANGE ISSTILL RIVITED TO THE INBOARD RIB IN 5 OTHER PLACESSDR CA030211006Tube · leaking(CAN) HARD TO START ENGINE. FIRST START OF DAY, CAUSED HUNG STARTS AT 50-55 PERCENT N1. NO TOT INCREASE WHEN HEATER VALVE OPENED. SERVICEABLE HOSE INSTALLED.SDR HDNA084070Case · crackedONE 4TH STAGE COMPRESSOR STATOR VANE BROKE OFF SEVERELY DAMAGING THE 4TH & 5TH STAGE COMPRESSOR BLADES WITH SUBSEQUENT COMPRESSOR STALLING AND LOW ENGINE POWER.SDR CA031210007Bearing Race · incorrect(CAN) AT 300 HR. INSPECTION IT WAS NOTED THE OUTER RACE DID NOT HAVE A P/N, S/N OR A HEAT TREATMENT NR ETCHED ON IT. THIS WAS NOTED ON THE AD COMPLIANCE RECORD ALSO (BUT USED ANYWAY). MD HELICOPTERS SERVICE ENGINEERING WAS CONTACTED AND WE WERE INFORMED THAT ISDR CA031210009Housing · cracked(CAN) AT REMOVAL OF TRANSMISSION FROM AIRFRAME A SUSPECTED CRACK IN THE T/R O/P COVER AT THE OIL PRESSURE SENDING UNIT WAS NOTED. THIS AREA WAS PAINT STRIPPED AND THE AREA WAS NOT ONLY CRACKED IT HAD ALSO BEEN STOP DRILLED, FILLED WITH EPOXY AND PAINTED. THIS SDR HEEA083322Bellows · dirtyHIGH STARTING TEMP AND NO START DERICH ADJUSTMENT LEFT. FOUND START DERICHMENT BELLOWS WAS NOT OPERATING PROPERLY. REMOVED BELLOWS TO INSPECT, AND FOUND BELLOWS SEATING SERVICE IN THE COVER, AND ON THE BELLOWS TO BE DIRTY. CLEANED BOTH AND TESTED AGAIN. STASDR HEEA083198Transducer · inoperativeTRANSDUCER SHOWING NO FUEL PRESSURE INDICATIION. SCRAPPED.SDR HEEA083492Fuel Control · malfunctionedNR 1 ENGINE SLOW TO ACCELERATE FROM 30 PERCENT THROUGH 50 PERCENT RANGE AND NO ADJUSTMENT LEFT. IN SHOP REPAIR.SDR HEEA083493Governor · malfunctionedENGINE DECELERATION, FOUND SEVERAL TEST POINTS TO BE SLIGHTLY EARLY, BUT WELL WITHIN SERVICE LIMITS. SPLIT UNIT AND INSPECTED INTERIOR OF DRIVE BODY. DURING INSPECTION OF DRIVE BODY INTERIOR FOUND NO DISCREPANCIES. COULD NOT DETERMINE ANY REASON FOR THIS USDR ERAA082942Gearbox · malfunctionedTORQUE FLUCTUATIONS. FOUND LOOSE PLUG ON AFT SLIDE OF COMPRESSOR STUD, HIDDEN DAMAGE FOUND WORN BUSHINGS ON OIL PUMP BODY AND WORN JOURNALS ON OIL PUMP SPUR GEAR. INSTALLED SERVICEABLE GEAR BOX HOUSING, NEW OIL PUMP SPUR GEAR AND PUMP BODY, OVERHAULED GEARBOXSDR ERAA082943Gearbox · leakingFOUND GEARBOPX SPLITLINE LEAKING. TWO STUDS NOT HOLDING TORQUE ON GEARBOX. RE-SEALED GEARBOX SPLIT LIND WITH EC776 GLUE. RE-SEATED TWO STUDS.SDR ERAA082947Governor · fluctuatesGOVERNOR PRODUCING FLUCTUATING TORQUE. REPAIRED AND TESTED IAW HONEYWELL OHM FORM 15-1095ASDR ERAA082948Fuel Control · contaminatedENGINE WILL NOT START, FUEL WON'T GO TO NOZZLE, HAS NEW SCREEN. FCU CONTAMINATED, REPAIRED AND TESTED IAW HONEYWELL OHM FORM 15-602E (FUEL SIDE OF FCU FLUSHED DUE TO CONTAMINATION)SDR ERAA082949Filter · cloggedFUEL CONTROL FLAMED OUT ENGINE AT IDLE. NO FUEL FLOW FROM NOZZLE OUTLET FUEL CIRCUIT FOUND CONTAMINATED. INLET FILTER PLUGGED. REPAIRED AND TESTED IAW HONEYWELL OHM FORM 15-602E.SDR ERAA082951Governor · damagedGOVERNOR REQUIRES REPAIR - BROKEN LOCKWIRE REPAIRED AND FUNCTIONALLY TESTED TO SPECS BY PRECISION ENGINES CORP.SDR CA030204011Retainer · broken(CAN) DURING ENGINE GEARBOX OVERHAUL A 3 INCH PIECE OF BALANCED RATAINING RING FOUND LAYING INSIDE GEARBOX. THE REMAINING BALANCED RATAINING RING WORE A STEP IN RETAINING RING GROOVE OF THE HELICAL TORGUEMETER GEARSHAFT. ROLLS ROYCE HAS BEEN NOTIFIED AND PICTUSDR CA030103015Governor · malfunctioned(CAN) TORQUE SPLIT OF 8 PERCENT REPORTED IN CRUISE. TEST FLIGHT REVEALED THAT BOTH GOVENORSWERE CAUSING THEIR RESPECTIVE N1 TO FLUCTUATE. BOTH GOVENORS WERE REPLACED ON BOTH ENGINES. A/C RETURNED TO SERVICE.SDR ERAA082932Tailpipe · misoverhauledEXHAUST COLLECTOR RETURNED FROM OVERHAUL 6-7-02. REMOVED FROM STOCK AND COULD NOT BE USED ON AIRCRAFT DUE TO EXCESSIVE DENTS ON INSIDE OF EXHAUST COLLECTOR.SDR CA030103016Tube · chafed(CAN) AFTER A FLIGHT OF 3.7 HOURS, WHILE DOING THE DAILY INSPECTION A LARGE PATCH OF OIL WAS FOUND UNDER THE HELICOPTER. THE BELLY WAS COVERED BY OIL. INVESTIGATION REVEALED 2 TUBES FROM THE TRANSMISSION TO THE OIL COOLER HAD CHAFED AGAINST EACH OTHER AND WERSDR HXS2003F00000Transmission · making metalMAIN ROTOR TRANSMISSION, MAKING METAL.SDR ALG2003F00004Pump · failedDURING FLIGHT, AFTER INITIAL START, THE PILOT WAITED 60 SECONDS TO TURN ON THE GENERATOR, AT THIS TIME THE ENGINE BEGAN TO FLAME OUT AND THE PILOT SHUT THE AIRCRAFT DOWN. THE MECHANIC INSPECTED THE ENTIRE FUEL SYSTEM AND FOUND IT TO BE OK. REMOVED AND REPLACSDR CA021223005Gearbox · failed(CAN) AIRCRAFT WAS BEING USED FOR CAPTURE WORK ON WOLVES 14.5 KMS NORTH OF BANFF NATIONAL PARK. AIRCRAFT WAS IN PURSUIT OF A WOLF THAT WAS NETTED, AIRCRAFT WAS AT A HEIGHT OF 6-10 FT. ABOVE GROUND, TRAVELLING AT 20 MPH IN A CROSSWIND. AT THE TIME OF PROBLEM SDR CA030108017Tail Rotor · departed(CAN) AC WAS AT A HEIGHT OF 6-10 FT ABOVE GROUND TRAVELING AT 20MPH IN CROSSWIND. AT TIME OF PROBLEM, FAIR AMOUNT OF LT PEDAL WAS BEING USED. AC TRAVELED APPROX 30FT CROSSWIND WHEN LOUD BANG WAS HEARD BY PILOT FOLLOWED BY T/R ASSY FLYING PASSED PILOTS CHIN BSDR HDNA081647Nozzle · misinstalledNEWLY OVERHAULED 2ND STAGE NOZZLE. DIAPHRAGM IS IMPROPERLY POSITIONED AND FOWARD TO AFT FLANGE OUT OF LIMITS. RETURNED FOR REPAIR.SDR HDNA081648Nozzle · misinstalledNEWLY OVERHAULED 2ND STAGE NOZZLE. DIAPHRAGM IS IMPROPERLY POSITIONED, FORWARD TO AFT FLANGEDIM. OUT OF LIMITS AND INTERSTAGE SEAL IMPROPERLY SPRAYED. RETURNED FOR REPAIR.SDR HEEA082390Turbine Wheel · damagedENGINE PRODUCING LOW POWER. UPON INSPECTION OF TURBINE PARTS NOTED SULFIDATION ON 1ST STAGE WHEEL BLADES. SCRAPPED.SDR CA021203005Drive Shaft · overtemp(CAN) THE PILOT NOTICED ON HIS DAILY INSPECTION THAT THE DRIVESHAFT TEMPLATES ON THE TRANSMISSION SIDE WERE ALL BLACK, INDICATING AN OVERTEMP ON THE COUPLING. THIS OCCURRED 4 HOURS AFTER THE 600 HOUR LUBRICATION INSPECTION OF THE DRIVESHAFT. AFTER CLOSE INSPECSDR ERAA091797Fuel Nozzle · malfunctionedFUEL NOZZLE STREAKS. ERRODED METER SET. INSTALLED NEW METER SET.SDR CA021125007Link · cracked(CAN) WHILE PERFORMING A 300 HOUR INSPECTION ON THE AIRCRAFT THE AME NOTICED A CRACKED LUG ON THE LEAD LUG LINK. AD 95-03-13 CALLS FOR A REPETITIVE 15 HOUR INSPECTION OF THIS AREA.SDR CA021119001Cable · broken(CAN) THE AIRCRAFT EXPERIENCED AN IN FLIGHT LOSS OF IT'S SLING LOAD. INVESTIGATION REVEALED THAT THE SWAGED END OF THE EMERGENCY RELEASE CABLE HAD COMPLETELY SEPARATED FROM THE CABLE CONDUIT. THIS PLACED THE CABLE CONSTANTLY UNDER PRELOAD .THE RESULT BEING THSDR CA021125005Seal · leaking(CAN) N2 TACH DRIVE SIDE OFF OF THE HYDRO-PACK WAS LEAKING HYDRAULIC FLUID.SDR CA021118002Window · broken(CAN) FLYING ALONG STRAIGHT AND LEVEL ALONG BRAGG CREEK WHEN THE DOOR POPPED OPEN. I SHUT THE DOOR AND CONTINUED FLYING. APPROXIMATELY 2 MINUTES LATER THE WINDOW BROKE LOSE AND FLEW AWAY FROM THE HELICOPTER. LANDED IMMEDIATELY AND SHUT DOWN TO INSPECT THE HELISDR AC2A081235Shaft · crackedPOTTING MISSING FROM END OF DRIVE SHAFT. REPLACED GOVERNOR.SDR AC2A081234Shaft · debondedPART IS DISBONDED. POTTING MISSING FROM END OF DRIVESHAFT. REPLACED GOVERNOR.SDR CA030103014Fuel Control · failed(CAN) TORQUE SPLIT REPORTED OF 6 TO 8 PERCENT IN CRUISE. AFTER A TEST FLIGHT TO DETERMINE WHICH GOVENOR WAS AT FAULT IT WAS DETERMINED THAT THE FCU WAS THE CAUSE FOR THE TORQUE SPLIT. THE FCU WAS REPLACED & A/C RETURNED TO SERVICE.SDR CA021105005Pump · failed(CAN) PUMP STOPPED PUMPING FOLLOWED BY A BOOST PUMP AFT CAUTION LIGHT.SDR AUS20021277Hose · worn(AUS) TRANSMISSION OIL HOSE CHAFING ON AIRCRAFT STRUCTURE.SDR AUS20021368Indicator · corroded(AUS) HYDRAULIC FILTER DIFFERENTIAL PRESSURE INDICATOR FAULTY. INDICATOR APPEARED TO BE STUCK DUE TO CORROSION AND DIRT.SDR CA021101008Sleeve · cracked(CAN) CRACKS FOUND DURING OVERHAUL. THE CRACKS STARTED AT CORNER OF GLOVES. IT LOOKS LIKE THE PLATING (TUNGSTEN CARBIDE) STARTED TO LIFT UP.
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