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.

SDR KBMA88793Bearing · wornTAIL ROTOR OIL COOLER HANGER BEARING, WORN, ROUGH, AND EXCESSIVE PLAY. INSTALLED NEW BEARINGS.Sep 17, 2001 · N667JM · Bell 206B · Tail Rotor Drive ShaftSDR CA011002002Piston · clogged(CAN) TORQUE INDICATOR ON THE GROUND READ 70 PERCENT TORQUE THEN CLIMBED TO 90 PERCENT TORQUE WITHOUT ADVANCING THE THROTTLE OR INCREASING THE POWER. TORQUE INDICATOR REPLACED, DEFECT DID NOT GO AWAY. REPLACED THE ENGINE GEARBOX. IT WAS NOTED THAT THE BLEED ORSep 17, 2001 · Bell 206B · Engine BMEP/Torque IndicatingSDR CA011011009Pump · failed(CAN) PUMP NOT WORKING MOTOR UNSERVICEABLE. REPLACED PUMP ASSEMBLY.Sep 16, 2001 · Bell 206B · Fuel Boost PumpSDR CA011002003Bearing · failed(CAN) PILOT REPORTED A CHIP LIGHT & A LOUD GRINDING NOISE COMING FROM THE ENGINE REGION. THE PILOT MADE A PRECAUTIONARY LANDING TO A LANDING SIGHT. THE CHIP PLUGS WERE REMOVED & FOUND LARGE AMOUNT OF FLAKES. ON THE INVESTIGATION FOUND THE TWO AND A HALF BEARINSep 15, 2001 · Bell 206B · Main Rotor GearboxSDR CA011119001Shaft · grooved(CAN) ONLY APPLIES TO A/C EQUIPPED WITH CASEY HEATER & ATTACHED DUCTING. DURING GROUND RUN CHECKS AFTER OPS CHECK (600 HR) INBOARD HEATING DUCT CONTACTED SHAFT ASSY P/N 206-040-325-5 & ADAPTER P/N 206-040-328-003 HEATING DUCT (HOSE) WASTORN & WIRE IN HEATER (HSep 14, 2001 · Bell 206B · Tail Rotor Drive ShaftSDR KBMA88794Volt Regulator · malfunctionedVOLTAGE REGULATOR MAX ADJUSTMENT IS 27.5 VOLTS. REMOVED AND REPLACED SERVICEABLE VOLTAGE REGULATOR.Sep 7, 2001 · N667JM · Bell 206B · DC RegulatorSDR CA011011007Structure · vibration(CAN) PART CAUSING HIGH VIBRATION IN T/R SYSTEM. REPLACED VERTICAL FIN.Aug 31, 2001 · Bell 206B · Rotorcraft Tail BoomSDR CA011011008Fitting · cracked(CAN) PART CRACK AT REAR RIVET. REPLACED FITTING.Aug 31, 2001 · Bell 206B · Rotorcraft Tail BoomSDR RYMA33656Transmission · failedMAKING METAL. TWO PRIOR PROBLEMS WITH MM WERE REPAIRED UNDER WARRANTY BY MFG. REPLACED WITH NEW UNIT CORRECTED PROBLEM.Aug 29, 2001 · N105LC · Bolkms BO105CBS · Main Rotor GearboxSDR AUS20010925Shaft · distorted(AUS) TAIL ROTOR GEARBOX OUTPUT SHAFT BEARINGS BREAKING UP AND SHAFTRUNOUT EXCESSIVE. SHAFT RUNOUT APPROXIMATELY 0.457MM (0.018IN). MAXIMUM RUNOUT 0.0254MM (0.001IN).Aug 24, 2001 · Hughes 369HS · Tail Rotor GearboxSDR VGY2001F00000Fuel Control · faultyAFTER INSTILLATION OF O/H ENG, HELICOPTER WAS GROUND RUN AND ALL ENG INSTRUMENTS AND OPERATION WAS NORMAL. A HOVER TEST FLIGHT WAS PERFORMED AND EVERYTHING STILL NORMAL. A SERIES OF 2 OR 3 HOVERING AUTOS WERE PERFORMED. DURING SPOOL UP ON LAST AUTO, NR 2 WOAug 21, 2001 · N200VB · Bell 206B · Fuel Control/Turbine EnginesSDR CA020405019Starter Gen · inoperative(CAN) STARTER GENERATOR INOPERATIVE.Aug 4, 2001 · Bell 206B · Starter-GeneratorSDR 2001F00604Turbine Wheel · brokenTURBINE RECEIVED FROM FIELD, REMOVED COMB CASE FOUND SULPHADATION ON NR 1 WHEEL. WHEEL HAS BROKEN BLADES DUE TO SULPHADATION. (M)Aug 3, 2001 · N5416F · Bolkms BO105CBS · Turbine SectionSDR KBMA88769Switch · inoperativeLIGHT STAYS OFF WITH BREAKER PULLED. REMOVED AND REPLACED WITH NEW SWITCH.Jul 28, 2001 · N667JM · Bell 206B · Flight Compartment LightingSDR CA011002009Fitting · cracked(CAN) TAILBOOM FITTING LT FUSELAGE SIDE FOUND CRACKED VERTICALLY 1 INCH IN LENGTH. NEW PART ORDERED AND INSTALLED.Jul 27, 2001 · Bell 206B · Rotorcraft Tail BoomSDR KBMA88767Display · inoperativeLED DISPLAY UNREADABLE. REMOVED AND REPLACED WITH SERVICEABLE UNIT.Jul 26, 2001 · N73DP · Bell 206B · VHF Communications SystemSDR CA020118003Bearing · spalled(CAN) UPON INSPECTION 3 BALL BEARINGS, FOUND EXCESSIVELY SPALLED AND INNER RACE SHOWED 3 SIGNS OF PITTING IN 3 AREAS. BEARING WAS SCRAPPED.Jul 25, 2001 · Bell 206B · Main Rotor Mast/SwashplateSDR CA020118004Mast · corroded(CAN) UPON 1500 HOUR INSPECTION OF MAST BEARING RETAINING NUT REMOVAL. PRC SEALANT WAS REMOVED FROM THE LOWER MAST THREADS TO UNCOVER CORROSION PITTING WELL IN EXCESS OF CORROSION TOLERANCES. MAST WAS SCRAPPED.Jul 25, 2001 · Bell 206B · Main Rotor Mast/SwashplateSDR CA010810005Blade · dented(CAN) DURING A DAILY INSPECTION THE PILOT NOTICED A DENT ON THE LEADING EDGE OF THE NOTED T/R BLADE. UPON INSPECTION THE DAMAGE WAS MEASURED AND FOUND TO BE IN LIMITS. FURTHER TO THE INVESTIGATION IT WAS FOUND THAT A SCREW HAD COME LOOSE FROM THE GEARBOX FAIRIJul 23, 2001 · Bell 206B · Tail Rotor BladesSDR KBMA88659Indicator · inoperativeVSI REPORTED INOPERATIVE. REMOVED AND REPLACED WITH SERVICEABLE UNIT.Jul 13, 2001 · N73DP · Bell 206B · Rate of Climb IndicatorSDR CA010724012Strap · cracked(CAN) WHILE INSTALLING ELECTRICAL EQUIPMENT, A CRACK WAS FOUND ON THE AFT OUTBOARD RADIUS, STATION 100.8. THE CRACK STARTED FROM THE EDGE OF THE STRAP AT A TOOLING MARK MADE EITHER DURING MANUFACTURE OR PREVIOUS INSTALLATION. THE CRACK IS APPROXIMATELY 2 1/2 IJul 12, 2001 · Bell 206B · Fuselage Miscellaneous StructureSDR CA010724036Seal · damaged(CAN) ON PRE-FLIGHT INSPECTION, GREASE LEAKAGE ON FORWARD COUPLING ON INPUT DRIVESHAFT WAS NOTED. FURTHER INSPECTION REVEALED THATTHE FORWARD SEAL ASSY HAD FAILED AND ALL THE GREASE IN THE FORWARD COUPLING WAS THROWN OUT WHICH CAUSED AN OVERHEAT CONDITION. A MJul 9, 2001 · Bell 206B · Tail Rotor Drive ShaftSDR KBMA88672Indicator · inoperativeSHOWING 20 PERCENT BANK ANGLE AFTER FIVE MINUTES IN FLIGHT. REPLACED WITH SERVICEABLE UNIT.Jul 7, 2001 · N73DP · Bell 206B · Rate of Climb IndicatorSDR CA010808003Bearing · spalled(CAN) TRANSMISSON REMOVED FROM A/C DUE TO METAL CONTAMINATION AND EXCESSIVE NOISE. ON DISASSEMBLY, MAIN INPUT GEAR SHAFT P/N 206040040003 WAS FOUND TO HAVE VERTICAL PLAY. AFTER REMOVING THE SHAFT AND THE DUPLEX THRUST BEARING P/N 2060400321 THE TOP BEARING OF Jul 6, 2001 · Bell 206B · Main Rotor GearboxSDR CA020405018Pump · inoperative(CAN) FORWARD BOOST PUMP INOPERATIVE.Jul 6, 2001 · Bell 206B · Fuel Boost PumpSDR 2001FA0000234Blade · crackedFOUND CRACK ON PREFLIGHT. NO SURE CAUSE FOR CRACK. CRACK BEYOND LIMITS.Jul 2, 2001 · N42AT · Aerosp AS355F2 · Main Rotor BladesSDR CA010627040Support Bracket · broken(CAN) THE FLANGE FOR THE VERTICAL FIN UPPER ATTACHMENT BOLT IS SEPARATED FROM SUPPORT DUE TO CRACK.Jun 27, 2001 · Bell 206B · Rotorcraft Tail BoomSDR 2001FA0000300Engine · malfunctionedDEPARTING THE AIRPORT, THE ENGINE FLAMED OUT OR SURGED. THE ENGINE WAS RUN ON A TEST CELL. TEST CELL SHOWED: 1)A CYCLING ANTI-ICE VALVE SOLENOID. 2) A RICH FUEL FLOW. 3) A WARPED OUTER COMBUSTION CHAMBER. THIS TOGETHER, COULD CAUSE A SURGE.Jun 23, 2001 · N34698 · Bell 206B · Engine (Turbine/Turboprop)SDR AQH2001F00000Seal · torn1) INSTALLED NEW SEAL PN23063371, MGR-80201, REV B, OTHER MARKINGSON SEAL ARE 63005SOCN. 2) SEAL STARTED LEAKING LESS THAN 4 HOURS AND 15 STARTS LATER, SEAL LIP IS TORN, APPEARS LIKE A RIP, SUSPECT SEAL IS NOT COMPATIBLE WITH EXXON 8380 TURBINE OIL AND MAYBE Jun 8, 2001 · N51698 · Bell 206B · Main Rotor GearboxSDR CA010625031Bearing · failed(CAN) PILOT FELT ENGINE VIBRATION, 30 MINUTES INTO THE FLIGHT, WITH CLIMB OF T.O.O. TURN BACK FOR LANDING. ENGINE OIL PRESS FLACTUATE. 6FT ABOVE GROUND THE ENGINE QUIT. THE PILOT DID LOWER AUTOROTATION, NO DAMAGE TO AIRCRAFT AND NO ONE GOT INJURED. INITIAL INSJun 6, 2001 · Bell 206B · Turbine Engine Compressor SectionSDR CA031117009Support · cracked(CAN) WHILE PERFORMING AN AW CHECK, CRACKS WERE SUSPECTED IN AFT CROSS TUBE SUPPORT AREA. AFTER PAINT STRIPPING CRACKS CONFIRMED AS FOLLOWS. A SMALL HAIRLINE CRACK WAS FOUND ON THE FWD LEG OF THE LT CROSS TUBE SUPPORT. CRACK IS JUST OUTBOARD OF 90 DEGREE ANJun 1, 2001 · Bell 206B · Master Cylinder/Brake ValveSDR CA010621026Pulley · failed(CAN) OIL COOLER PULLEY IS MADE UP OF A SPLINE BELT PULLEY WITH A METAL RING THAT IS "STAKED" ONTO THE PULLEY. THE RING WAS FOUND AROUND THE ENGINE OUTPUT DRIVE SHAFT AFTER GROUND RUNNING THE A/C. A NEW PART WAS USED TO COMPARE THE STAKING MARKS ON THE OLD PULMay 24, 2001 · Hughes 369HS · Engine Oil CoolerSDR 20010613CW021Bearing · failedAIRCRAFT IN CRUISE FLIGHT. PILOT NOTICED THAT THE MAIN ROTOR NR 2 STARTED TO OVER-SPEED. PILOT LANDED AIRCRAFT SAFELY UNDER ITS OWN POWER. AFTER INVESTIGATING CAUSE, IT WAS FOUND THAT THE ENGINE FUEL CONTROL SHAFT BEARING HAD FAILED CAUSING FUEL CONTROL TO May 20, 2001 · N6BU · Bell 206B · Fuel Control/Turbine EnginesSDR CA020405022Bolt · worn(CAN) EXCESSIVE WEAR ON THE MAIN ROTOR BLADE BOLT SHANK.May 3, 2001 · Bell 206B · Main Rotor BladesSDR CA010425004Brushes · broken(CAN) STARTER-GENERATOR WAS INSPECTED BECAUSE OF PREVIOUS HISTORY OF PROBLEMS IN THIS AR4A. UPON INSPECTION FOUND 3 BRUSH LEADS BROKEN OFF BRUSHES AND 3 SPRINGS BROKEN. THE STARTER GENERATOR HAS BEEN REMOVED FOR OVERHAUL. STARTER-GENERATOR LAST OVERHAULED AT CApr 5, 2001 · Bell 206B · Starter-GeneratorSDR 20010416CW016Governor · failedGOVERNOR FAILURE RANGES FROM 72 HOURS TO 1750 HOURS.Mar 25, 2001 · N5108E · Hughes 369D · Turbine GovernorSDR 20010301CW004Elt · crackedINSPECTING ELT, FOUND CASE TO BE IN MANY PIECES WITH CRACKS THROUGHOUT ENTIRE UNIT. PLASTIC SEEMS TO BE VERY SOFT AND BRITTLE. THIS IS SECOND ELT OF THIS MAKE AND MODEL THAT HAS BEEN FOUND IN THIS CONDITION DURING TESTING FOR NON OPERATION.Mar 1, 2001 · N67PJ · Bell 206B3 · Emergency Locator BeaconSDR KBMA88680Pressure Switch · inoperativeFORWARD BOOST PUMP PRESSURE SWITCH INOPERATIVE.Mar 1, 2001 · N73DP · Bell 206B · Fuel Boost PumpSDR KBMA88679Pressure Switch · malfunctionedFUEL PRESSURE SWITCHES NOT OPERATING PROPERLY. CAUTION LITE REMAINS ON WITH CIRCUIT BREAKER IN.Feb 27, 2001 · N667JM · Bell 206B · Engine Fuel DistributionSDR 20010420CW015Skin Panel · debondedAFTER LANDING AND WALK AROUND, RIGHT SKID PANEL METAL STRIP WAS FOUND DEBONDED FROM SKID PANEL.Feb 22, 2001 · N15Q · Bell 206B · Fuselage Main, Plate/SkinSDR CA010307007Bearing · corroded(CAN) SEVERE PITTING OF LOWER BEARING JOURNAL INNER RACE AT LOWER PORTION OF MAST ASSEMBLY.Feb 14, 2001 · Bell 206B · Main Rotor Mast/SwashplateSDR CA010110023Gear · failed(CAN) BURR ON GEAR FACE CAUSED DAMAGE TO THE BEARING.Dec 22, 2000 · Bell 206B · Hydraulic Pump (Electric/Engine), MainSDR CA010110014Bolt · misinstalled(CAN) INBOARD LATERAL BALANCE WEIGHTS LOOSE. INBOARD BOLT P/N AN4-12A WAS TOO LONG FOR THE AMOUNT BALANCE WEIGHTS INSTALLED. WE CONTACTED PRODUCT SUPPORT AND THEY SAID TO INSTALL A SHORTER AN4 BOLT. WE INSTALLED AN AN4-11A BOLT.Dec 12, 2000 · Bell 206B · Main Rotor BladesSDR CA001218013Fitting · broken(CAN) UPON SCHEDULED INSPECTION THE RT HORIZONTAL STABILIZER WAS FOUND TO HAVE SOME PLAY. FURTHER INVESTIGATION REVEALED THE FITTING WHICH ATTACHES THE STABILIZER TO THE TAIL BOOM WAS CRACKED. WHEN THE STAB WAS REMOVED, THE FITTING CAME OFF IN 2 PIECES. IT WASNov 28, 2000 · Bell 206B · Horizontal Stabilizer StructureSDR CA001205011Mast · failed(CAN) DURING THE SERVICEABILITY CHECK (AFTER THE METAL WAS FOUND ON THE CHIP PLUG) MORE METAL WAS FOUND ON THE CHIP PLUGS AND THE OIL MONITOR. MAST AND THE TRANSMISSION WERE REPLACED. (X)Nov 23, 2000 · Bell 206B · Main Rotor Mast/SwashplateSDR R7MR32686Sensor · inoperativeUNIT INOPERATIVE. NO PRESSURE DROOP INDICATION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 18, 2000 · N30LG · Aerosp AS355F1 · Ignition SwitchingSDR CA001201018Line · loose(CAN) ENGINE DECELERATED ON TAKEOFF FOR TEST FLIGHT AFTER ENGINE CHANGE. CAUSE WAS DETERMINED TO BE LOOSE B-NUT ON GOVERNOR TO FUEL CONTROL UNIT AIR LINE.Nov 16, 2000 · Bell 206B · Engine Fuel DistributionSDR CA001030005Line · failed(CAN) OIL LINE FAILED AT AREA WHERE IT IS CLAMPED TO THE UPPER DECK. (X)Oct 17, 2000 · Bell 206B · Hydraulic System, MainSDR CA001017007Compressor · cracked(CAN) DURING 100-HOUR INSPECTION OF THE HELICOPTER, A BLACK LINE WAS OBSERVED ON ONE OF THE COMPRESSOR ASSEMBLY MOUNTING PAD ARMS WHICH FORMS THE REAR DIFFUSER OF THE COMPRESSOR. CLOSER VISUAL INSPECTION WITH MAGNIFYING GLASS CONFIRMED CRACK. THE CRACKED MOUSep 15, 2000 · Bell 206B · Compressor Bleed ControlSDR CA000926017Disc Pack · misinstalled(CAN) WHILE INSPECTING A NEW PART PRIOR TO INSTALLATION, IT WAS NOTED THAT INDIVIDUAL DISCS WERE NOT CORRECTLY STACKED PER BELL 206 MAINTENANCE MANUAL (FIGURE 65-6, PARAGRAPH 65-19 CAUTION COPY ATTACHED.) THE NOTE ATTACHED TO THE DISC SET STATES THAT THEY MUSTSep 14, 2000 · Bell 206BELL · Tail Rotor Drive Shaft
Back to Allison 250-C20