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 LS1R088307Volt Regulator · failedDC REGULATOR FAILED TO REGULATE.May 29, 2002 · N90322 · Bell 206B3 · DC RegulatorSDR LS1R088285Indicator · failedGAS PRODUCER INDICATOR HAS AN INTERNAL FAILURE.May 26, 2002 · N49718 · Bell 206B3 · Engine Pressure Ratio (EPR)SDR KBMA113836Bleed Valve · inoperative(BLEED VALVE) ENGINE POWER CHECK INDICATES ENGINE BELOW MINIMUM PERFORMANCE SUSPECTS FAULTY BLEED VALVE. REPLACED WITH SERVICEABLE BLEED VALVE.May 14, 2002 · N188TV · Bell 206B · Compressor Bleed ValveSDR KBMA133853Bolt · shearedVERTICAL FIN SUPPORT BRACKETT BOLT SHEARED. REPLACED WITH NEW BOLT.May 10, 2002 · N73DP · Bell 206B · Rotorcraft Tail BoomSDR KBMA133854Igniter · shearedIGNITER WORN AND SHEARED. REPLACED WITH NEW IGNITER.May 10, 2002 · N73DP · Bell 206B · Spark Plug/IgniterSDR KBMA113855Bolt · brokenTUBINE OIL PSI NOZZLE TO NR 5 BEARING ATTACHMENT BOLT BROKEN. REPLACED WITH SERVICEABLE UNIT.May 10, 2002 · N73DP · Bell 206B · Turbine Engine Oil SystemSDR AUS20020430Support · damaged(AUS) REAR CROSS TUBE SUPPORT AREA DAMAGED. SUSPECT THE AREA HAD BEEN DAMAGED BY A HARD LANDING AND THEN INADEQUATELY REPAIRED. THE HELICOPTER HAD ONLY RECENTLY BEEN IMPORTED INTO AUSTRALIA. PERSONNEL/MAINTENANCE ERROR.May 6, 2002 · Bell 206B · Fuselage, Landing Gear Attach FittingsSDR CA020523005Seal · torn(CAN) STARTER/GENERATOR OIL SEAL LIPS TEARING AFTER INSTALLATION AND SHORT TIME USE. 2 SEALS AEPLACED AFTER 1 HOUR FLIGHT DUE TO SEAL TORN. ENGINE CEB1388 COMPLETED ON LAST ONE. NO FURTHER FAULT.May 6, 2002 · Bell 206B · Starter-GeneratorSDR ALG2002F00036Floor Support · crackedDURING MAJOR INSPECTION, SEVERE CORROSION AT ALL MATING SURFACES AND ENDS OF ALL STIFFENING STRINGERS CRACKED. ALL MOUNTING FLANGES CRACKED AND CORRODED. USE PROSEAL AND PRIME THE PARTS AFTER ASSEMBLY, INSTALL DOUBLER AROUND WATER WASH FITTING TO PREVENT CRAMay 1, 2002 · N497AL · Bell 407 · Fuselage Miscellaneous StructureSDR CA020507015Fitting · cracked(CAN) - FITTING LOOKED CRACKED ON REMOVAL, PART CRACKED IN HALF.- FITTING WAS PRO-SEALED TO TAILBOOM & HAD VERY LITTLE GIVE.Apr 25, 2002 · Bell 206B · Rotorcraft Tail BoomSDR CA020430007Shaft · worn(CAN) GENERATOR FAILED. GENERATOR INSPECTED, FOUND AFT SHAFT WORN.THIS PORTION OF SHAFT ENGAGES TO THE COMMUTATOR.Apr 10, 2002 · Bell 206B · Starter-GeneratorSDR CA020501012Governor · failed(CAN) ASSEMBLY PURCHASED ON EXCHANGE OVERHAUL BASE ON OUR PO 2170 FOR REPLACEMENT OF A PREIOUS UNIT S/N 85430071 THAT HAD ALSO FAILED FOR THE SAME REASON WITH 1039.1 HOURS. ASSEMBLY RECEIVED FROM ESSENTIAL TURBINE PS 4806, AND ARC FOM 24-0078 CERTIFICATE REF LApr 10, 2002 · Bell 206B · Turbine GovernorSDR LS12002F00000Longeron · corrodedDURING STRUCTUAL REPAIR OF ENGINE DECK. CORROSION WAS NOTICED ON THE RIGHT LONGERON RUNNING ALONG THE RIGHT SIDE OF THE ENGINE PAN. IT WAS NOTICED THAT RED DYE PENETRANT WAS COVERING THE AREA OF CORROSION . SOMEONE AT A PRIOR DATE HAD INSPECTED THE AREA ANDApr 2, 2002 · N49718 · Bell 206B · Fuselage Main, Longeron/StringerSDR CA020403009Ring · cracked(CAN) BALANCE RING WAS PARTIALLY CRACKED. (MAIN GEARBOX TORQUE GEAR "BALANCE RING" FOUND CRACKED)Mar 26, 2002 · Bell 206B · Main Rotor GearboxSDR KBMA113800Probe · inoperativeFUEL GAUGE REPORTED INOPERATIVE. REPLACED WITH NEW FUEL PROBE TANK UNIT.Mar 24, 2002 · N73DP · Bell 206B · Fuel Quantity SensorSDR KBMA113858Actuator · inoperativeLINEAR ACTUATOR, UNABLE TO ADJUST N2/NR. REPLACED WITH SERVICEABLE UNIT.Mar 21, 2002 · N73DP · Bell 206B · Main Rotor ControlSDR ALG2002F00020Shaft · wornDURING REPAIR, FOUND SPLINE WEAR BELOW MIN. LIMIT.Mar 19, 2002 · N847AL · Bell 407 · Engine/Transmission CouplingSDR 2002FA0000545Strut · brokenFOUND LANDING STRUT BROKEN AT THE DRAG BRACE BOLT HOLE. REMOVED AND REPLACED STRUT.Mar 15, 2002 · N90431 · Hughes 369D · Main Landing Gear Strut/Axle/TruckSDR CA020719003Bearing · failed(CAN) CHIP LIGHT CAME ON AT START UP. ENGINE CHIP PLUGS WERE CLEANED ONLY TO COME ON AGAIN ON THE NEXT START UP. THE ENGINE WAS IMMEDIATELY PULLED AND SENT TO AN OVERHAUL SHOP. THEY DISCOVERED THAT THE PROBLEM WAS THE NR 2 BEARING RACE WAS BEING WARN AWAY.Mar 13, 2002 · Hughes 369HS · Turbine SectionSDR CA020307009Insert · leaking(CAN) OIL LEAKING FROM LOWER STARBOARD COMPRESSOR MOUNT INSERT. ENGINE REMOVED, DISASSEMBLED AND GEARBOX SENT TO ENGINE OVERHAUL FACILITY.Feb 26, 2002 · Bell 206B · Main Rotor GearboxSDR CA020227002Cage · worn(CAN) THE FREEWHEEL UNIT WAS REMOVED EARLY FOR ITS 1500 HOUR INSPECTION FOR MAINTENANCE CONVIENIENCE. DURING INSPECTION IT WAS NOTED THAT THE CAGE WINDOWS WERE WORN BEYOND THE 0.004Feb 25, 2002 · Bell 206B · Engine/Transmission CouplingSDR 2002FA0000309Guide · brokenDURING 100/300 ROUTINE INSPECTION THE GUIDE TUBE FOR THE SPRING LOADED FILLETS WERE FOUND BROKEN ON (3) THREE LANDING GEAR.Feb 12, 2002 · N5074R · Hughes 369D · Main Landing GearSDR 2002FA0000308Bearing · inoperativeFOUND LEFT FRONT MAIN LANDING GEAR KEEL BEARING AND RETAINER BACKED OUT OF KEEL FITTING. IT IS NORMALLY RETAINED WITH A CIRCLIP BUT IT WAS NOT ENGAGED BUT IT WAS CAPTURED BY THE BOLT. THE LIMIT OF REMOVAL WAS DEFINED BY THE FORK ON THE END OF THE LANDING GEAFeb 9, 2002 · N5074R · Hughes 369D · Wheel/Ski/FloatSDR LS1R088297Pump · inoperativeFUEL PUMP FAILED CHECK/ INOPERATIVE.Feb 8, 2002 · N8330P · Hughes 369E · Fuel Boost PumpSDR CA020208003Washer · cracked(CAN) 2060101543 WASHER WAS USED ON A BLADE BOLT WITH A NAS1022A14 NUT. THE NUT IS A SMALLER NUT AND TENDS TO COVER ONLY 2/3 OF THE AREA OF THE WASHER. THE TORQUE REPETITIVE TORQUE CYCLES OVER TIME AND THE CUPPING OF THE WASHER CAUSED IT TO CRACK IN 3 PLACEJan 31, 2002 · Bell 206B · Main Rotor BladesSDR R7MR35308Transmitter · inoperativePRESSURE TRANSMITTER, UNIT INOPERATIVE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jan 29, 2002 · N105LC · Bolkms BO105CBS · Engine Oil PressureSDR ALG2002F00010Frame · crackedROUTINE INSPECTION, UPPER SECTION OF FRAME CRACKED ABOVE RIGHT ATTACHMENT CASTING. PROBABLE CAUSE: RIGHT UPPER SHIM ON TAILBOOM (407-030-810-119) NOT BURNISHED AT EDGES.Jan 28, 2002 · N457AL · Bell 407 · Rotorcraft Tail BoomSDR LS1R088291Pump · inoperativeBOOST PUMP IS INOPERATIVE.Jan 20, 2002 · N500DC · Hughes 369D · Fuel Boost PumpSDR LS1R088277Pump · roughFUEL PUMP ROUGH.Jan 19, 2002 · N8330P · Hughes 369E · Aircraft Fuel Distribution SystemSDR CHI2002F00000Bracket · crackedLT TORQUE PEDAL BRACKET FAILED PRIOR TO ENG START ON GROUND. FAILED BRKT ASSY WAS SENT TO LOCAL LAB FOR FRACTOGRAPHIC EXAMINATION. -7 (RT) BRACKET FROM SAME HELICOPTER AND BOTH -8 AND -7 BRACKETS FROM SECOND HELICOPTER WERE REMOVED FOR VISUAL AND NDT INSP. Jan 18, 2002 · N502CH · Hughes 369D · Tail Rotor Control SystemSDR CHI2002F00001Bracket · crackedLEFT TORQUE PEDAL BRACKET FAILED PRIOR TO ENG START ON GROUND. FAILED BRACKET WAS SENT TO LOCAL LAB FOR FRACTOGRAPHIC EXAMINATION. -7 (RT) BRACKET FROM SAME HELICOPTER AND BOTH -8 AND -7 BRACKETS FROM SECOND HELICOPTER WERE REMOVED FOR VISUAL AND NDT INSP. Jan 18, 2002 · N501CH · Hughes 369D · Tail Rotor Control SystemSDR AC2A0000303Bearing · wornBEARINGS WERE WORN BEYOND LIMIT. REPLACED WITH NEW BEARINGS.Dec 20, 2001 · N71319 · Bell 206B · Tail Rotor BladesSDR AC2A0000304Bearing · wornTO REPLACE BEARINGS IN TAIL ROTOR AT OUT FACILITY.Dec 20, 2001 · N71319 · Bell 206B · Tail Rotor HeadSDR AC2A0000305Sleeve · wornSLEEVES WERE WORN IN TAIL ROTOR ASSEMBLY. REPLACED WITH NEW SLEEVES.Dec 20, 2001 · N71319 · Bell 206B · Tail Rotor HeadSDR AUS20011455Gear · damaged(AUS) MAIN TRANSMISSION SUN GEAR TEETH (2OFF) CHIPPED WITH SUBSTANTIALSECONDARY DAMAGE. METAL CONTAMINATION OF TRANSMISSION. SUSPECTPNO 206-040-122-3 GEAR IS NOT TO BE USED IN A PNO 206-040-002-025 MODEL TRANSMISSION AS PER TB 206-75-12.Dec 17, 2001 · Bell 206B · Main Rotor GearboxSDR AC22002F00001Exhaust Header · crackedEXHAUST ASSEMBLY CRACKED. REPLACED WITH NEW EXHAUST DUCT.Dec 2, 2001 · N715CC · Bell 206L3 · Engine Collector/Tailpipe/NozzleSDR CA020405023Nozzle · cracked(CAN) FIRST STAGE NOZZLE FOUND CRACKED BEYOND ACCEPTABLE LIMITS.Nov 19, 2001 · Bell 206B · Turbine SectionSDR KBMA112017Switch · failedFUEL PUMP FAIL LIGHT DOES NOT LIGHT UP WHEN CIRCUIT BREAKER IS PULLED. REMOVED AND REPLACED WITH NEW SWITCH.Nov 18, 2001 · N73DP · Bell 206B · Engine Fuel PumpSDR CA011127004Support · leaking(CAN) TURBINE ASSY WAS RECD IN FOR SMOKING ON SHUTDOWN. SMOKING WAS ENCOUNTERED APPROX 7 2NDS AFTER THROTTLE WAS ROLLED TO OFF POS.UPON DISASSY & INSPECTION OF PT SUPPORT IT FOUND THAT INNER DIAMETER (DIA.S) SHOULDER WIDTH WAS INSUFFICIENT FOR PROPER SEALING ONov 15, 2001 · Bell 206B · Turbine SectionSDR R7MR34237Indicator · failedTRIPLE RPM INDICATOR, UNIT INOPERATIVE. OUT OF BOX FAILURE. NR 2 NEEDLE READS 12 PERCENT LOW. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 25, 2001 · N485EC · Bolkms BO105S · Rotor Drive Indicating SystemSDR LS1R076721Fuel Control · malfunctionedMAKES ENGINE RUMBLE AT IDLE; ENGINE N1 DECREASES 1/2 TO 1 PERCENT WITH START PUMP ON AND RETURNS TO NORMAL WHEN OFF.Oct 22, 2001 · N5027P · Hughes 369D · Fuel Control/Turbine EnginesSDR ALG2001F00042Coupler · crackedDAILY 25 HOUR INSPECTION FOUND NR 7 DISC PACK COUPLING CRACKED.Oct 4, 2001 · N457AL · Bell 407 · Tail Rotor Drive ShaftSDR ALG2001F00040Bearing · mismarkedUPON VERIFICATION OF PN AND SN AFTER CHECKING OUT OF STOCK. INNER RACE AND ROLLER RETAINER BOTH HAVE 2 DIFFERENT SERIAL NUMBERS ETCHED ON THE PART. ASSURE THE PART NUMBER AND SERIAL NUMBER AT FACTORY.Oct 3, 2001 · N497AL · Bell 407 · Turbine Engine Accessory DriveSDR AWT2001F00000Elt · malfunctionedELT WOULD ACTIVATE ON ITS OWN, RETURNED TO MANUFACTURE. REPLACED G SWITCH, RECERTIFY AND FOUND TO BE OK.Sep 26, 2001 · N67PJ · Bell 206B · Emergency Locator BeaconSDR AC22001F00004Clip · crackedCLIP, PART IS CRACKED. REPLACED WITH NEW PART.Sep 25, 2001 · N715CC · Bell 206L3 · Fuselage Miscellaneous StructureSDR CA011002001Fcu · failed(CAN) FUEL CONTROL WAS REPAIRED. FUEL CONTROL WAS INSTALLED ON BELL 206B DUE TO THE OLD ONE NEARING OVERHAUL. AFTER GROUND RUNS A TEST FLIGHT WAS CARRIED OUT ON AIRCRAFT. AFTER THE TEST FLIGHT THROTTLE WAS DECREASED TO FLIGHT IDLE WHEN THE ENGINE ALMOST FLAMEDSep 24, 2001 · Bell 206B · Fuel Control/Turbine EnginesSDR AC22001F00001Stiffener · crackedSTIFFENER PART IS CRACKED. REPLACED WITH NEW PART.Sep 23, 2001 · N715CC · Bell 206L3 · Fuselage Miscellaneous StructureSDR AC22001F00002Stiffener · crackedSTIFFENER, PART IS CRACKED. REPLACED WITH NEW PART.Sep 23, 2001 · N715CC · Bell 206L3 · Fuselage Miscellaneous StructureSDR AC22001F00003Stiffener · crackedSTIFFENER, PART IS CRACKED. REPLACED WITH NEW PART.Sep 23, 2001 · N715CC · Bell 206L3 · Fuselage Miscellaneous StructureSDR KBMA88816Indicator · fluctuatesSHOWS RAPID RISE IN TEMPERATURE, INSTALLED SERVICEABLE UNIT.Sep 21, 2001 · N73DP · Bell 206B · Engine EGT/TIT Indicating System
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