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 CA980706034Crosstube · corroded(CAN) CORROSION BLISTER ON UNDERSIDE OF AFT LANDING GEAR CROSSTUBE. CORROSION DEPTH 0.75 TO 1.25 MM OVER A VISIBLE 30 SQUARE MM AREA. SUBMITTER SUGGESTED POSSIBLE INTERGRANULAR CORROSION.SDR CA980724019Bearing · worn(CAN) MAIN ROTOR HUB, EXCESSIVE UP AND DOWN PLAY ON MAST.SDR CA981013004Bearing · worn(CAN) MAIN ROTOR HEAD HAS EXCESSIVE PLAY UP AND DOWN ON MAST.SDR CA981013005Bearing · worn(CAN) MAIN ROTOR HEAD HAS EXCESSIVE UP AND DOWN PLAY ON MAST.SDR CA981013006Bearing · worn(CAN) MAIN ROTOR HUB EXCESSIVE UP AND DOWN PLAY ON MAST.SDR 98ZZZX2788Pump · strippedTHREADS STRIPPED ON PUMP LOW PRESSURE VALVE. REMOVED FROM AIRCRAFT AND SENT FOR REPAIR.SDR 98ZZZX2471Tie Bolt · failedDURING AN ACCIDENT INVESTIGATION ON A BELL 206B2 CONVERTED TO B3, NOTED THE ENGINE TURBINE, 2ND STAGE WHEEL FLY-AWAY DAMAGING THE HELICOPTER FUSELAGE. FURTHER INVESTIGATION REVEALED THE TIE-BOLT BROKE ABOUT .25 INCH FROM THE THREADED AREA. THE TIE-BOLT WAS RSDR 98ZZZX2483Actuator · failedDURING AN ANNUAL INSPECTION OF THE ENGINE ANTI-ICE VALVE SYSTEM, FOUND THE ACTUATOR ERRATIC (THIS AIRCRAFT HAS BEEN MODIFIED, BY FIELD APPROVAL, FOR INSTALLATION OF THE BELL HELICOPTER 206B ENGINE ANTI-ICE ACTUATOR SYSTEM). REPLACED ACTUATOR.SDR AU980783Seal · leaking(AUS) TAIL ROTOR GEARBOX INPUT SEAL LEAKING. PART TOTAL CYCLES: 27.SDR CA980615009Quadrant Plate · wrong part(CAN) FOLLOWING INSTALLATION OF THE FUEL CONTROL, THE THROTTLE POSITION INDICATOR ON THE FUEL CONTROL SHOWED THE THROTTLE TO BE BELOW THE IDLE MARK ON THE QUADRANT WHEN THROTTLE WAS POSITIONED ON THE IDLE DETENT. QUADRANT PLATE WAS VISIBLY DIFFERENT FROM THOSSDR HEEA0014463Actuator · inoperativeACTUATOR INOPERATIVE.SDR HEEA0014464Servo Motor · inoperativeSERVO WILL NOT EXTEND OR RETRACT.SDR HEEA0014465Servo Motor · faultyUNABLE TO ADJUST AND SLIP.SDR AU980991Skin · corroded(AUS) VERTICAL FIN ASSEMBLY SKIN CORRODED. PART TC: 7,193.SDR 98ZZZX2583Wheel · crackedUPON REMOVAL OF 3RD STAGE TURBINE WHEEL FOR CYCLE LIMIT, FOUND A CRACK COMPLETELY THROUGH THE WHEEL SHROUD AND A PORTION OF ONE BLADE.SDR CA980622005Cross Tube · broken(CAN) AFTER SHUT DOWN, A SNAP WAS HEARD BY CREW AND HELO SAGGED IN THE BACK. AFT CROSSTUBE BROKEN AT THE FUSELAGE MOUNTING POINT. CROSSTUBE HAD BEEN STRIPPED, INSPECTED PER CF-95-17 AND REPAINTED 40 HOURS PREVIOUS.SDR 98ZZZX2795Fuel Control · failedAFTER PICKING AIRCRAFT UP TO A HOVER TO REPOSITION, NR 1 ENGINE DECELLED. LANDED WITHOUT INCIDENT. SUSPECT INTERNAL F/C FAILURE. MAINTENANCE REPLACED FUEL MANAGEMENT SYTEM.SDR 98ZZZX2211Wheel Blade · failedTHE PILOT REPORTED COMPRESSOR STALLS DURING LIFT OFF OF THE HELICOPTER. AFTER INSPECTION OF THE COMPRESSOR, THE NR 3 WHEEL WAS FOUND MISSING A BLADE. THE BLADE BROKE OFF DAMAGING SEVERAL WHEELS BEFORE EXITING OUT.SDR 98ZZZX2093Gearbox · failedTORQUE PRESSURE INCREASED WHEN THROTTLE WAS REDUCED. SUSPECT TORQUE PISTON BLEED HOLE IS PLUGGED IN GEARBOX. GEARBOX SHIPPED TO OVERHAUL FACILITY FOR INSPECTION/REPAIR. REF: CONTROL NR 98-5-5.SDR 98ZZZX2030Filter · contaminatedFOUND SOME LIGHT CONTAMINATION (5 PERCENT SCREEN COVERAGE). CONTAMINATION APPEARS FIBEROUS IN NATURE. RECOMMEND MORE FREQUENT INSPECTIONS.SDR 98ZZZX2094Compressor · seizedCOMPRESSOR INSTALLED ON AIRCRAFT AT ZERO TSO. AFTER GROUND RUNS, AIRCRAFT WAS TEST FLOWN. UPON NEXT START ATTEMPT AFTER APROXIMATELY 10 MINUTES SHUTDOWN TIME, ANOTHER START WAS ATTEMPTED. COMPRESSOR HAD SEIZED. UPON REMOVAL AND INSPECTION, IT WAS FOUND TO SDR 98ZZZX2095Compressor · vibrationEXHAUST STACKS CRACKED. VIBRATION ANALYSIS CHECK INDICATED COMPRESSOR WAS VIBRATING EXCESSIVELY. COMPRESSOR WAS REMOVED AND SENT FOR REPAIR EVALUATION. REF: CONTROL NR 98-5-9.SDR CA980908018Bearing · damaged(CAN) RIGHT INPUT BEARING PEELING.SDR 98ZZZX2096Valve · stickingENGINE NOT MAKING POWER. BLEED VALVE STICKING. SENT FOR REPAIR EVALUATION. REF: SN FF35627. CONTROL NR 98-5-2.SDR HEEA0014112Wheel · sulfidationENGINE REMOVED DUE TO COMPRESSOR IMPELLER CYCLES. TURBINE DISASSEMBLED DUE TO LOW POWER ON TEST CELL. UPON INSPECTION OF TURBINE PARTS NOTED: MINOR SULPHIDATION ON ALL BLADES OF NR1 WHEEL. SCRAPPED #1 WHEEL.SDR AU980990Blade · corroded(AUS) MAIN ROTOR BLADE LEADING EDGE UPPER SURFACES PEELING AWAY. FURTHER INSPECTION FOUND INTERGRANULAR CORROSION ON THE LOWER SURFACE. EDDY CURRENT INSPECTION CONFIRMED INTERNAL CORROSION. PART TC: 2,209.SDR 98ZZZX1893Filter · dirtyFOUND SOME CONTAMINATION AT BASE OF FILTER SCREEN WHERE IT IS BRAZED TO MOUNTING BASE. ABOUT 5 PERCENT OF FILTER CLOGGED WITH LIGHT TAN TO WHITE FLAKES AND FIBEROUS SUBSTANCE SLIGHTELY LARGER THAN SCREEN MESH.SDR 98ZZZX1935Fuel Control · defectiveDURING VISUAL INSPECTION OF FUEL CONTROL DURING ENGINE BUILD-UP, FOUND FUEL CONTROL DRIVE SHAFT BEARING MAKING NOISE WHEN ROTATED BY HAND, AND HAD SLIGHT RADIAL PLAY AND ROUGH FEEL WHEN SIDE LOAD WAS APPLIED AND ROTATED. SENT IN FOR REPAIR.SDR 99ZZZX751Bleed Valve · malfunctionedENGINE NOT MAKING POWER. REMOVED AND REPLACED. AWAITING INSPECTION REPORT. REF: CONTROL NR 98-4-15.SDR 98ZZZX1725Filter · contaminatedFOUND SOME CONTAMINATION ON FILTER WHERE SCREEN ATTACHES TO BASE. ALSO, BLACK PARTICULATES ON BASE FACING INLET OF FUEL. CONTAMINATION CLEANED BY ULTRASONIC METHOD GOOD.SDR AU980992Stiffener · cracked(AUS) ENGINE MOUNT STIFFENER LOCATED ON THE FORWARD RT SIDE CRACKED. PART TC: 7,193.SDR AU980993Control · misrigged(AUS) TAIL ROTOR CONTROLS INCORRECTLY RIGGED ALLOWING TAIL ROTOR CONTROL TUBE P\N 206-001-020-033 TO RUB ON BULKHEAD P\N 206-031-200-51. PART TC: 7,193.SDR CA980507004Damper Arm · fractured(CAN) A COMPLETE FRACTURE OCCURRED CAUSING THE ARM TO FAIL IN 2 PIECES. THE DAMPER ARM HOLDS A VIBRATION ABSORBING WEIGHT TO A FLIGHT CONTROL. THE FAILURE OF THE ARM DOES NOT AFFECT CONTROLLABILITY EXCEPT FOR INCREASED CYCLIC CONTROL VIBRATION, HOWEVER, THE LISDR 98ZZZX1740Compressor · fodCOMPRESSOR STALLING. FOUND 1ST STAGE BEARING LEAKING. APPEARS THAT COMPRESSOR HAD FOD. REMOVED FROM AIRCRAFT AND OVERHAULED COMPRESSOR INSTALLED. CONTROL NR 98-4-11.SDR AU980437Gear · pitted(AUS) DURING A SCHEDULED INSPECTION, METAL WAS FOUND ON THE M/R TRANSMISSION'S CHIP DETECTORS. ON TEAR DOWN INSPECTION, THE TRANSMISSION'S INPUT GEAR SHAFT WHICH FORMS THE INNER BEARING SURFACE FOR BEARING PN 206-040-031-107 RACE WAS FOUND TO HAVE SEVERE BRINSDR CA980602054Bolt · mismanufactured(CAN) BOLT RECEIVED WITH OBVIOUS DEFECTS. PIECES .001 INCH - .002 INCH THICK FLAKING OFF THE SHANK SURFACE.SDR HEEA0013994Nozzle Shield · crackedENGINE REMOVED DUE TO TURBINE CYCLES. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON NR1 NOZZLE SHIELD INNER BAND AS MARKED AND CRACK AT POSITIONING LUGS AS MARKED.SDR HEEA0014001Turbine Wheel · pittedRECEIVING INSPECTION REVEALED: PITS BEYOND SERVICEABLE LIMITS ON NR2 WHEEL BLENDED AREA E (AFT) AS MARKED. NOTE: BLENDING OF THESE PITS WOULD EXCEED OVERHAUL LIMITS OF .050 DEEP. INSTALLED A NEW NR2 WHEEL.SDR HEEA0014002Coupling · wornENGINE REMOVED DUE TO TURBINE OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED: N1 COUPLING FAILED NO-GO GAUGE. INSTALLED A NEW N1 COUPLING.SDR HEEA0014003Nozzle Shield · crackedENGINE REMOVED DUE TO 3500 HOUR TURBINE OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON NR1 NOZZLE SHIELD DOME AREA ABOUT 45% AROUND.SDR HEEA0014010Tube Assy · wornENGINE REMOVED DUE TO METAL. INSPECTION OF GEARBOX PARTS REVEALED: TUBE ASSY. FAILED DIMENSIONAL CHECK PER CEB1307. INSTALLED A NEW TUBE.SDR HEEA0014011Tube Assy · wornENGINE REMOVED DUE TO METAL. INSPECTION OF GEARBOX PARTS REVEALED: TUBE ASSY. FAILED DIMENSIONAL CHECK PER CEB1307. INSTALLED A NEW TUBE.SDR HEEA0013980Turbine Wheel · defectiveENGINE REMOVED DUE TO TURBINE 1750 HOUR INSPECTION. UPON INSPECTION OF TURBINE PARTS NOTED: SEVERE SULFIDATION ON ALL NR3 WHEEL BLADES. SCRAPPED NR3 WHEEL AND REPLACED WITH SERVICEABLE PART.SDR HEEA0013981Turbine Wheel · defectiveENGINE REMOVED DUE TO TURBINE 1750 HOUR INSPECTION. UPON INSPECTION OF TURBINE PARTS NOTED: CATASTROPHIC SULFIDATION ON ALL NR1 WHEEL BLADES. SCRAPPED NR1 WHEEL AND REPLACED WITH SERVICEABLE PART.SDR HEEA0013972Nozzle · defectiveRECEIVED NR4 NOZZLE AND ATTEMPTED TO MACHINE TIP PATHS. NOTED: COATING LIFTING AND FLAKING DURING MACHINING.SDR CA980602047Doubler · cracked(CAN) CRACK IN DOUBLER FOR PITCH CHANGE OPENING AT BS 183.0, CRACK IS .750 INCHES LONG OF TOTAL DOUBLER WIDTH OF 1 INCH.SDR 98ZZZX1618Bleed Valve · failedENGINE WOULD NOT MAKE POWER. PERFORMANCE RUN FOUND ENGINE RUNNING WITH EXCESSIVELY HIGH TOT. BLEED VALVE REPLACED, PERFORMANCE CHECK OK, ACFT RETURNED TO SERVICE. CNTRL NR 98-4-6.SDR 98ZZZX1619Governor · malfunctionedPT GOVERNOR WAS SURGING BELOW LIMITS. PT GOVERNOR REPLACED, OPS CHECK OK. AIRCRAFT RETURNED TO SERVICE. CNTRL NR 98-4-5.SDR 98ZZZX1620Fuel Control · defectiveFUEL CONTROL BEARING - BLUE GREASE WASHED OUT. SENT FOR REPAIR. CNTRL NR 98-4-7.SDR 98ZZZX2793Drive Splice · disconnectedTHE ENGINE RPM BECAME UNSABLE. REMOVED GOVERNOR, FOUND RETAINING RING, RING RETAINER, AND SHIM MISSING FROM SHAFT.
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