Allison 250-C20B

Service difficulty reports · 1,981

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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.

SDR 2000ZZZX271Engine · malfunctionedAFTER ARRIVAL AT AIRPORT, GROUND RAN THE AIRCRAFT. NR 2 ENGINE COULD ONLY OBTAIN 68 PERCENT N2 SPEED WITH THROTTLE IN THE FLY POSITION. SHUT DOWN ENGINE, PERFORMED STATIC LEAK CHECK ON NR 2 ENGINE WITH NO LEAKS NOTED. SUBMITTER RECOMMENDED GOVERNOR CHANGE.Nov 6, 1998 · N105NG · Bolkms BO105S · Engine (Turbine/Turboprop)SDR HEEA0016671Actuator · failedACTUATOR WILL NOT ACTUATE.Nov 5, 1998 · N81982 · Bolkms BO105S · Engine Anti-Icing SystemSDR HEEA0016679Actuator · failedACTUATOR WILL NOT ACTUATE.Nov 5, 1998 · N721MB · Bolkms BO105S · Fuel Controlling SystemSDR AU981538Ring · missing(AUS) HYDRAULIC PUMP ATTACHMENT COUPLING P/N 850509-1 SEPARATED FROM THE HYDRAULIC PUMP. INVESTIGATION FOUND THE PUMP DRIVE SPLINE RETAINING RING WAS MISSING.Nov 4, 1998 · Bell 206B3 · Hydraulic Pump (Electric/Engine), MainSDR AU981539Coupling · wrong part(AUS) ENGINE TO MAIN TRANSMISSION DRIVESHAFT AFT OUTER COUPLING TO FREEWHEEL ASSEMBLY FLANGE INCORRECTLY ASSEMBLED. TWO WASHERS WERE INSTALLED UNDER EACH OF THE FOUR ATTACHMENT BOLT HEADS. WASHERS SHOULD ONLY BE INSTALLED UNDER EACH NUT. THE BOLTS WERE NOT Nov 4, 1998 · Bell 206B3 · Engine/Transmission CouplingSDR AU981542Screw · wrong part(AUS) MAIN ROTOR HUB FLAP RESTRAINT ASSEMBLY SCREWS WERE THE INCORRECT PART NUMBER FOR THE INSTALLATION. CORRECT P/N M524694-555. MAST NUT FOUND BELOW MINIMUM TORQUE VALUE.Nov 4, 1998 · Bell 206B3 · Main Rotor HeadSDR HEEA0016177Shaft · spalledENGINE REMOVED DUE TO METAL. UPON INSPECTION OF COMPRESSOR PARTS NOTED: SPALLING ON SHAFT GEAR TEETH. INSTALLED A NEW SHAFT.Oct 19, 1998 · N2270G · Bell 206B3 · Turbine Engine Compressor SectionSDR HEEA0016178Bearing · spalledENGINE REMOVED DUE TO METAL. UPON INSPECTION OF GEARBOX PARTS NOTED: SPALLED ON NR 2 1/2 BEARING OUTER RACE AND ROLLERS. INSTALLE D A NEW BEARING.Oct 19, 1998 · N8199J · Bolkms BO105S · Turbine Engine Reduction GearSDR CA981027007Shaft · wrong part(CAN) ON DISASSEMBLY AT OVERHAUL FACILITY, THE APC STARTER/GENERATOR WAS FOUND TO CONTAIN A LUCAS SHAFT AND A LUCAS DAMPENER IN PLACE OF THE APC SHAFT, P/N 150SG1103-2. THE ASSEMBLY ALSO HAD A SECOND DAMPENER DEVICE AT THE ANTI-DRIVE END. SUBMITTER STATED NOct 16, 1998 · Bell 206B · Starter-GeneratorSDR CA981125047Nut · missing(CAN) ON 200-HOUR INSPECTION, FOUND ONE OF THE TAIL ROTOR DRIVESHAFT HANGERS WITHOUT A NUT OR COTTER PIN.Oct 14, 1998 · Bell 206L · Tail Rotor Drive ShaftSDR CA981022004Clamp · cracked(CAN) IN THE HOVER, TAIL STROBE LIGHT CLAMP BROKE OFF AT THE ATTACHMENT TABS. POSSIBLE OVERTORQUE OF THE ATTACHMENT SCREW.Oct 12, 1998 · Hughes 369D · Exterior LightingSDR HEEA0016136Gearbox · making metalENGINE REMOVED DUE TO METAL. INSPECTION OF GEARBOX REVEALED: PULLED COMPRESSOR MOUNT INSERT AS MARKED AND BRONZE LIFTING ON GEARBOX FORWARD AND AFT PTO BORES.Oct 8, 1998 · N81992 · Bolkms BO105S · Turbine Engine Reduction GearSDR HEEA0016137Cover · looseENGINE REMOVED DUE TO LOW POWER. UPON DISASSEMBLY OF ENGINE NOTED: DETACHED SPARE CAGE IN GEARBOX. GEARBOX DISASSEMBLY REVEALED: DETACHED SPARE CAGE AND LOOSE CAGES AS MARKED ON GEARBOX COVER. INSTALLED OVERHAULED COVER.Oct 8, 1998 · N86CH · Bolkms BO105S · Turbine Engine Reduction GearSDR HEEA0016138Housing · looseENGINE REMOVED DUE TO LOW POWER. UPON DISASSEMBLY OF ENGINE NOTED: DETACHED SPARE CAGE IN GEARBOX. GEARBOX DISASSEMBLY REVEALED: LOOSE P.T.O. CAGE IN GEARBOX HOUSING. INSTALLED A OVERHAULED GEARBOX HOUSING.Oct 8, 1998 · N86CH · Bolkms BO105S · Turbine Engine Reduction GearSDR HEEA0016130Nozzle · malfunctionedENGINE REMOVED DUE TO LOW POWER AND SMOKE ON DECELERATION. REPLACED NR 3 NOZZLE, POWER INCREASED 6 PERCENT. TRIED NR 3 NOZZLE ON ANOTHER TURBINE. LOW POWER ON TEST CELL. REPLACED NOZZLE AND HAD A 3 PERCENT INCREASE IN POWER. INSTALLED A STANDARD AERO OVEOct 7, 1998 · N5031U · Bolkms BO105S · Fuel Injector NozzleSDR HEEA0016121Tube · mismanufacturedRECEIVING INSPECTION REVEALED: TUBE UNABLE TO FIT INTO SCROLL. PART OVERHAULED ON W/O NR L169384.Oct 6, 1998 · Bolkms BO105S · Turbine Engine Compressor SectionSDR HEEA0016123Nozzle · mismanufacturedRECEIVING INSPECTION REVEALED: VOIDS IN NR 4 NOZZLE TIP PATHS. PART OVERHAULED ON WO NR L174496.Oct 6, 1998 · N967MB · Bolkms BO105S · Turbine SectionSDR HEEA0016124Collector · mismanufacturedRECEIVING INSPECTION REVEALED: MEASURED .085 INCH OVER BP SPECS (.105 INCH - .110 INCH) ON EXHAUST COLLECTOR FLANGE. PART OVERHAULED ON W/O NR 15644.Oct 6, 1998 · Bolkms BO105S · Turbine SectionSDR CA981109047Cable · separated(CAN) INADVERTENT RELEASE OF LOAD. SWAGED END OF MANUAL RELEASE CABLE SEPARATED CAUSING THE HOOK TO UNLATCH.Oct 1, 1998 · Bolkms BO105C · Cargo CompartmentsSDR AU981241Pin · broken(AUS) MAIN ROTOR BLADE RETAINING PIN BROKEN. PART TC: 4,180.Sep 27, 1998 · Hughes 369D · Main Rotor BladesSDR AU981537Fuel Cell · contaminated(AUS) FUEL CELL CONTAMINATED BY DEBRIS AND FUNGAL GROWTH. BOTH FUEL BOOST PUMPS ALSO COVERED WITH FUNGUS. PART TC: 1,246.Sep 25, 1998 · Bell 206B3 · Fuel StorageSDR 99ZZZX1118Nozzle · crackedTHE FAA-PMA NOZZLE WAS REMOVED FROM AN ALLISION 250-C20B TURBINE THAT WAS RECEIVED FOR OVERHAUL. UPON FLUORESCENT PENETRANT INSPECTION, FOUND A SERIES OF CRACKS ON BOTH SIDES OF THE DIAPHRAGM IN THE RADIUS OF THE BEND AT ITS OUTER DIAMETER. THE CRACKS ON THESep 24, 1998 · Turbine SectionSDR CA981125044Servo · failed(CAN) AFTER SERVO INSTALLATION, THE TEST FLIGHT REVEALED CONTROL FEEDBACK. SERVO REPLACED.Sep 23, 1998 · Bell 206B · Rotorcraft Servo SystemSDR HEEA0016046Wheel · mismanufacturedRECEIVING INSPECTION REVEALED: MEASURED .010 INCH OVER SPECS (7.506 INCH - 7.508 INCH) ON NR 3 WHEEL OUTSIDE DIAMETER. INSTALLED A NEW NR 3 WHEEL.Sep 16, 1998 · N7136H · Bolkms BO105S · Turbine SectionSDR CA980922005Cover · separated(CAN) IN CRUISE DURING A 40 MINUTE FLIGHT, PILOT FELT A THUMP IN PEDALS BUT NO BUZZ DEVELOPED. ON POST-FLIGHT INSPECTION, PILOT NOTICED BELLCRANK COVER MISSING AT STATION 142. THREE STUDS STILL IN PLACE. ONE TAIL ROTOR BLADE HAD A DENT BEYOND LIMITS.Sep 13, 1998 · Hughes 369D · Accessory Compartment DoorsSDR HEEA0016031Fuel Control · out of adjustON FIRST START AFTER INSTALLATION IN THE AIRCRAFT, TOT ROSE RAPIDLY. FOUND START/ACCEL AND START/DERICH ADJUSTMENTS TURNED TO MINIMUM, NO MORE ADJUSTMENT AVAILABLE. RECEIVED UNIT IN SHOP WITH START DERICHMENT AND START ACCELERATION ADJUSTMENTS BOTH ADJUSTED Sep 11, 1998 · N4573B · Bolkms BO105S · Fuel Control/Reciprocating EnginesSDR 98ZZZX3643Governor · lack of lubeGOV HAS BLUE GREASE WASHED OUT. SENT FOR REPAIR.Sep 9, 1998 · N1097J · Hughes 369D · Turbine GovernorSDR CA981019014Nozzle · failed(CAN) FUEL NOZZLE WAS SENT FOR CLEANING AND FLOW CHECK. THE FUEL NOZZLE WAS RETURNED SERVICEABLE. AFTER 66 HOURS OF SERVICE THE ENGINE BROKE DOWN AND THE CAUSE WAS ATTRIBUTED TO THE COMBUSTION LINER. THE FUEL NOZZLE WAS REINSTALLED AND AFTER 75 HOURS OF SERVSep 8, 1998 · Hughes 369D · Fuel Injector NozzleSDR HEEA0015945Wheel · mismanufacturedENGINE REMOVED DUE TO COMPRESSOR OVERHAUL. TURBINE DISASSEMBLED DUE TO LOW POWER ON TEST CELL. UPON INSPECTION OF TURBINE PARTS NOTED: MEASURED .006 INCH OVER BLUE PRINT SPECS. (6.190 INCH - 6.191 INCH) ON NR 1 WHEEL OUTSIDE DIAMETER. INSTALLED A NEW Sep 3, 1998 · N50293 · Bolkms BO105S · Turbine SectionSDR HEEA0015947Line · misalignedRECEIVING INSPECTION REVEALED: MISALIGNMENT OF TUBE ASSEMBLY. INSTALLED A NEW TUBE ASSY.Sep 3, 1998 · N107PH · Bell 206B3 · Engine Bleed Air SystemSDR HEEA0015933Servomotor · failedSERVO MOTOR WILL NOT ACTUATE, FILTER SHORTED TO GROUND.Aug 28, 1998 · N4573B · Bolkms BO105S · Fuel Controlling SystemSDR HEEA0015934Servomotor · failedSERVO MOTOR WILL NOT ACTUATE UP OR DOWN, BRAKE STICKING.Aug 28, 1998 · N967MB · Bolkms BO105S · Fuel Controlling SystemSDR HEEA0015854Pump · malfunctionedBYPASS VALVE NOT SEALING CLOSED.Aug 27, 1998 · N137AE · Bolkms BO105S · Engine Fuel PumpSDR HEEA0015765Wheel · corrodedENGINE REMOVED DUE TO LOW POWER. UPON INSPECTION OF TURBINE PARTS NOTED: MINOR SULPHIDATION ON 12 BLADES. SCRAPPED NR 1 WHEEL.Aug 26, 1998 · N5031U · Bolkms BO105S · Turbine SectionSDR AU981432Bearing · failed(AUS) MAIN ROTOR MAST UPPER BEARING FAULTY. INVESTIGATION FOUND ONE BALL TO HAVE SEVERE PITTING/BRINELLING WITH THE OUTER RACE SHOWING SIGNS OF FAILURE. PART TC: 1,224.Aug 24, 1998 · Bell 206B3 · Main Rotor Mast/SwashplateSDR AU981078Turbine · cracked(AUS) SECOND STAGE TURBINE WHEEL CRACKED IN THREE PLACES. CRACK LENGTHS APPROXIMATELY 25.4 MM (1 INCH). PART TC: 1,621.Aug 19, 1998 · Turbine SectionSDR AU981399Skin · cracked(AUS) RIGHT FUSELAGE CRACKED FROM THE FORWARD FACE OF THE HEATER DUCT HOLE THROUGH THE INNER INSPECTION HOLE AND UP THE AFT FACE OF THE CLOSURE PANEL. CRACKING WAS HIDDEN BENEATH SOUND PROOFING.Aug 10, 1998 · Bell 206B3 · Fuselage Main, Plate/SkinSDR HEEA0015324Servo Motor · inoperativeSERVOMOTOR INTERMITTENTLY INOPERATIVE.Jul 29, 1998 · N4302G · Bolkms BO105S · Fuel Controlling SystemSDR 98ZZZX2955Engine · making metalENGINE CHIP LIGHT CAUTION LIGHT ILLUMINATED. PILOT MADE PRECAUTIONARY LANDING AT A FIELD SITE 3 MILES SOUTH OF AIRPORT. CHIP DETECTORS REMOVED AND INSPECTED IAW ALLISON OPERATION AND OVERHAUL MANUAL 10WZ PAG G-1. SMALL CHIPS AND FLAKES WERE NOTED (3), PLUGSJul 27, 1998 · N90322 · Bell 206B · Engine (Turbine/Turboprop)SDR HEEA0015237Valve Sleeve · unbondedFOUND DEFECTIVE METERING VALVE SLEEVE (UNBONDED). REPLACED METERING VALVE SLEEVE. UNIT TESTED SATISFACTORY PER TEST CALIBRATION SPECS NR 12529-01.Jul 27, 1998 · N911BR · Bolkms BO105S · Fuel Control/Reciprocating EnginesSDR HEEA0015240Servo Motor · malfunctionedNR STARTED TO DROOP AFTER TAKEOFF AND WOULD NOT BEEP UP.Jul 27, 1998 · N7170D · Bolkms BO105S · Fuel Controlling SystemSDR HEEA0015269Servo Motor · failedACTUATOR WOULD NOT BEEP. FOUND WIRE WORN THROUGH AT BODY.Jul 27, 1998 · N7170D · Bolkms BO105S · Fuel Controlling SystemSDR 98ZZZX3160Control Cable · brokenON LAST FLIGHT OF THE DAY, ROLLED THE GAS PRODUCER N1 CONTROL TO FLIGHT IDLE. UNABLE TO SHUT ENGINE OFF WITH THROTTLE CONTROL. ENGINE HAD TO BE SHUT DOWN MANUALLY. UPON INVESTIGATION, FOUND CABLE ASSY BROKEN UNDER PILOT'S SEAT DECK. FAILED PART, POSSIBLY BJul 23, 1998 · N969W · Bell 206B · Fuel Controlling SystemSDR CA990531005Bearing · misinstalled(CAN) DURING A 300 HOUR CLUTCH INSPECTION, AN INCORRECT P/N 369A5363 TYPE BEARING WAS FOUND TO BE INSTALLED IN THE -51 CLUTCH. THE BEARING WAS MARKED MRC R12. THE O/H MANUAL STATES THAT THE BEARINGS MARKED MRC R12 MUST NOT BE INSTALLED IN A -51 CLUTCH.Jul 20, 1998 · Hughes 369D · Engine/Transmission CouplingSDR 98ZZZX3545Case Halves · damagedFAILURE OF THE STATOR CAUSED A COMPRESSOR FAILURE RESULTING IN LOSS OF POWER ON THE ENGINE. A SINGLE ENGINE LANDING WAS ACCOMPLISHED WITH NO FURTEHR INCIDENT.Jul 13, 1998 · N911HR · Bolkms BO105CBS · Turbine Engine Compressor SectionSDR HEEA0015155Wheel · mismanufacturedENGINE REMOVED DUE TO COMPRESSOR OVERHAUL. TURBINE DISASSEMBLED DUE TO LOW POWER ON TEST CELL. UPON INSPECTION OF TURBINE PARTS NOTED: MEASURED .006 INCH OVER BLUEPRINT SPECS (6.190-6.191) ON NR 1 WHEEL OUTSIDE DIAMETER. INSTALLED A NEW NR 1 WHEEL.Jul 13, 1998 · N50293 · Bolkms BO105S · Turbine SectionSDR CA980916035Nozzle · cracked(CAN) PILOT REPORTED TOT OF 813C FOR 6 SECONDS. INSPECTION FOUND THE TURBINE FIRST STAGE NOZZLE CRACKED AND ERODED ON 19 VANES. THE COMBUSTION LINER 980916051 WAS ALSO CRACKED. THE OVERTEMP IS NOT CONSIDERED THE SOURCE OF EITHER THE TURBINE OR COMBUSTION LIJul 9, 1998 · Hughes 369D · Turbine SectionSDR CA980908042Valve · failed(CAN) ON TEST, SLOW INFLATION OF EMERGENCY FLOAT. DISASSEMBLY OF VALVE SHOWED 2 SUPPORT HEADS AND 2 TEFLON DISCS ON BOTTOM OF VALVE.Jul 8, 1998 · Bell 206L · Emergency Flotation SectionSDR CA980818022Line · bent(CAN) NR 6 AND NR 7 SCAVENGE OIL LINE (P/N 6853464) REMOVED, FOUND BENT AND DENTED. LINE WAS ALSO INCORRECTLY INSTALLED ONTO NR 8 BEARING SCAVENGE OIL INLET FITTING. NR 8 BEARING SCAVENGE OIL LINE (P/N 6853463) REMOVED, FOUND BENT AND DENTED. THE LINE WAS AJun 29, 1998 · Bell 206L · Turbine Engine Oil SystemSDR HEEA0015043Gear · pittedRECEIVING INSPECTION REVEALED: PITS BEYOND SERVICEABLE LIMITS ON A/O SEP. GEAR TEETH. INSTALLED A NEW A/O SEP. GEAR.Jun 26, 1998 · N8197X · Bolkms BO105S · Turbine Engine Accessory Drive
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