Allison 250-C47B

Service difficulty reports · 1,403

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 = '250C47B'
  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 ALG2004F00015Indicator · failedDURING TAKE OFF FUEL QUANTITY GUAGE LOST POWER, RECYCLED QUANTITY CIRCUIT BREAKER 3 TIMES, QUANTITY INDICATOR CAME ON AND AT THE SAME TIME RT TRANSFER PUMP CAUTION ILLUMINATED. RECYCLED RT PUMP CIRCUIT BREAKER BUT COULD NOT EXTINGUISH TRANSFER PUMP LIGHT. QUMar 20, 2004 · N647AL · Bell 407 · Fuel Indicating SystemSDR ALG2004F00013Spring · misalignedSLIGHT VIBRATION ON LANDING, CHECKED ROTOR SYSTEM ON POST FLIGHT AND FOUND FRAHM DAMPER SPRING MISALIGNED. MAINTENANCE FOUND BROKEN SPRING IN FRAHM DAMPER. REMOVED AND REPLACED FRAHM DAMPER.Mar 10, 2004 · N577AL · Bell 407 · Main Rotor HeadSDR CA040816005Combustion Liner · cracked(CAN) COMBUSTION LINER FOUND CRACKED DURING TURBINE REMOVAL. NO CRACKS ALLOWED IN THIS AREA.Mar 4, 2004 · Bell 407 · Turbine Engine Combustion SectionSDR ALG2004F00009Connector · failedWHEN AIRCRAFT WAS PICKED UP TO A HOVER. AS AIRCRAFT CAME TO A HOVER, ENGINE OIL PRESSURE WENT HIGH. AIRCRAFT WAS LANDED BACK ON PAD, SHUT DOWN AND CONTACTED MAINTENANCE. MAINTENANCE REPLACED ENGINE OIL PRESSURE TRANSDUCER, DID NOT FIX PROBLEM. THEN REPLACEFeb 27, 2004 · N607AL · Bell 407 · Engine Oil PressureSDR BAQA093856Inverter · inoperativeWARRANTY. UNIT IS NOT GIVING A/C OUTPUT VOLTAGE. REPLACED WITH SERVICABLE UNIT. 03/18/2004Feb 27, 2004 · N302LE · Bell 407 · AC InverterSDR ALG2004F00008Chip Detector · contaminatedDURING TAKEOFF, TRANSMISSION LIGHT CAME ON FOR 30 SECONDS THEN IT WENT OFF. MAINTENANCE FOUND CARBON PARTICLES ON PLUG, CHANGED FILTER AND OIL GROUND RAN LEAKED CHECK GOOD.Feb 23, 2004 · N627AL · Bell 407 · Main Rotor GearboxSDR 2004FA0000271Bearing · seizedBEARING SEIZED DURING TRAINING FLIGHT, RESULTING IN D/S FAILURE AND LOSS OF T/R CONTROL ALLOWING THE TAIL ROTOR BLADES TO STRIKE TAILBOOM. (WP17200403114)Feb 19, 2004 · N601MT · Bell 407 · Tail Rotor Control SystemSDR ALG2004F00007Wire · damagedWHILE LIFTING OFF FOR TAKE OFF, THE TRANSMISSION TEMPERATURE GAUGE FLUCTUATED FROM 0 TO MAX AND REMAINED AT MAX AFTER THROTTLE REDUCED TO IDLE. MAINTENANCE FOUND SHAFTED WIRE NUMBER E629A22 INSIDE CONNECTOR AT TRANSMISSION TEMPERATURE BULB. REPAIRED WIRE ANFeb 16, 2004 · N697AL · Bell 407 · Instrument System WiringSDR BAQA092490Pump · intermittentEXCHANGE. FUEL PUMP OPERATING INTERMITTENTLY. REPLACED WITH SERVICALE UNIT. 02/02/2004Jan 30, 2004 · N213AE · Bolkms BK117B1 · Fuel Boost PumpSDR CA040816008Combustion Liner · cracked(CAN) CRACKS FOUND IN OUTER COMBUSTION CASE ARMPIT AREA ON NORMAL DAILY INSPECTION. NO CRACKS ALLOWED IN THIS AREA.Jan 27, 2004 · Bell 407 · Turbine Engine Combustion SectionSDR HEEA092745Gearbox · corrodedREMOVED DUE TO EXCESSIVE CORROSION ON MAIN HOUSING IN AREA AROUND CHIP PLUG, AIR BREATHER VENT AND AT HOLES WHERE SAFETY WIRE IS ATTACHED TO HOUSING. GEARBOX WAS OVERHAULED AT T.T. 2575.00 ON FORM TRACKING AND W/O BH2122TN. SEND GEARBOX TO MFG FOR WARRANTY RJan 25, 2004 · N496PH · Clark 1000CLARK · Tail Rotor GearboxSDR ALGA091474Bearing · roughTURBINE SECTION BEARING FOUND TO BE ROUGH AFTER INSTALLATION.Dec 9, 2003 · Clark 1000CLARK · Turbine SectionSDR CA040227005Turbine Wheel · failed(CAN) M 407 HELICOPTER HAD 3RD STAGE TURBINE WHEEL FAILURE IN FLIGHT. AIRCRAFT CRASHED. TURBINE WHEEL PART TIME 1144 HOURS SINCE NEW.Dec 1, 2003 · Bell 407 · Turbine SectionSDR CA040227004Turbine Wheel · failed(CAN) 3RD TURBINE STAGE WHEEL BLADES SHED IN FLIGHT. PART TIME SINCE NEW : 2852 HOURS. PILOT IDENTIFIED FLIGHT PROBLEM AND LANDED IN AUTOROTATION.Nov 16, 2003 · Bell 407 · Turbine SectionSDR E5W2003F00001Stud · crackedCRACK-LIKE INDICATIONS AT STUD RADIUS CONTINUING TO HOLES ON SOME OF THE STUDS. IMPERFECTIONS, DEFECTS DETECTED BY FLUORESCENT PENT.Nov 5, 2003 · N407SM · Bell 407 · Main Rotor HeadSDR CA031023007Drive Shaft · failed(CAN) PILOT HAD TAKEN OFF. SHORTLY THEREAFTER HEARD A THUMP FROM THE REAR FOLLOWED BY VIBRATION. ON REACHING FINAL DESTINATION INSPECTION REVEALED NR 5 TR DRIVE SHAFT BEARING 407-040-339-101 FAILED.OVERHEAT EVIDENCE ON THE HANGAR AND DAMAGE SUSTAINED TO THE REOct 19, 2003 · Bell 407 · Tail Rotor Drive ShaftSDR E5W2003F00000Stud · crackedCRACK-LIKE INDICATION DETECTED AT STUD RADIUS. CRACK LIKE INDICATION FOUND BY FLUORESCENT MAGNETIC PARTICLE EXAMINATION.Sep 10, 2003 · N508MT · Bell 407 · Main Rotor HeadSDR ALGA089029Support · defectiveRECEIVED NEW FROM AVIALL. C/W PRESSURE CHECK,LEAKED INTERNALLY ON PRESSURE CHECK TEST. RETURNED PART TO VENDOR FOR WARRANTY EXCHANGE.SUBMITTED BY:PRESTON BARZARESep 8, 2003 · N647AL · Bell 407 · Engine Mount SectionSDR AUS20030917Blade · cracked(AUS) TAIL ROTOR BLADE CRACKED CHORDWISE FROM WATER DRAIN HOLE LOCATED AT BLADE ROOT. CRACK LENGTH APPROXIMATELY 40MM (1.57IN).Sep 5, 2003 · Bell 407 · Tail Rotor BladesSDR ALGA088877Support · defectiveCOMPRESSOR SUPPORT LEAKING INTERNALLY ON PRESSURE CHECK TEST. RETURNED PART TO VENDOR FOR WARRANTY CREDIT.Aug 26, 2003 · N647AL · Bell 407 · Engine Mount SectionSDR ALG2003F00087Transmitter · failedIN LEVEL FLIGHT, CHECK INSTRUMENT LIGHT ILLUMINATED, I TOOK POWER AWAY AND THE LIGHT WENT OUT. CHECK INSTRUMENT LIGHT ILLUMINATED AGAIN AND THE TORQUE GAUGE CYCLED FROM ZERO TO PEGGED OUT. EXCEDANCE SHOWED 63 PERCENT OVER TORQUE. LOWERED TEMP TO 200 DEGREESAug 25, 2003 · N497AL · Bell 407 · Engine BMEP/Torque IndicatingSDR ALG2003F00088Indicator · malfunctionedIN LEVEL FLIGHT CHECK INSTRUMENT LIGHT ILLUMINATED, TOOK POWER AWAY AND THE LIGHT WENT OUT. CHECK INSTRUMENT LIGHT ILLUMINATED AGAIN AND THE TORQUE GAUGE CYCLED FROM ZERO TO PEGGED OUT EXCEDANCE SHOWED 63 PERCENT OVER TORQUE. LOWERED TEMP TO 200 DEGREES BELOAug 25, 2003 · N497AL · Bell 407 · Engine BMEP/Torque IndicatingSDR ALG2003F00092Connector · contaminatedIN FLIGHT, FADEC FAILED IN-FLIGHT, LIGHTS AND HORN SIMULTANEOUSLY HAD 2 TO 4 PERCENT DROP IN NP. MATCHED TORQUE IN CONTROLLED NP/NR WITH COLLECTIVE AND THROTTLE. MAINTENANCE CLEANED CONNECTOR ON COMPRESSOR SPEED SENSOR ON ENGINE. OPS CHECKED GOOD, AIRCRAFTAug 24, 2003 · N416AL · Bell 407 · Fuel Control/Turbine EnginesSDR ALG2003F00091Indicator · malfunctionedIN CRUISE FLIGHT, EXCEDENCE ON MGT WITH CHECK INSTRUMENT LIGHT DURING CRUISE WITH INSTRUMENT INDICATOR IN THE GREEN (704 TO 714). THE MECHANIC CHECKED COMPUTER FOR EXCEDENCE, HAD NO EXCEDENCE OR FAULTS RECORDED, REPLACED INDICATOR MGT.Aug 23, 2003 · N537AL · Bell 407 · Engine Temperature Indicating SystemSDR ALG2003F00090Chip Detector · malfunctionedDURING LANDING, TRANSMISSION LIGHT ILLUMINATED AS AIRCRAFT WAS LANDING ON EC 195, CHECKED CHIP PLUGS, FOUND NORMAL FUZZ C/W 30 MINUTE GROUND RUN, LEAK CHECKED GOOD. AIRCRAFT WAS RETURNED TO SERVICE.Aug 22, 2003 · N457AL · Bell 407 · Rotor Drive Indicating SystemSDR ALGA088782Support · crackedSUPPORT CRACKED AT DZUS RECEPTICALES. PROBABLE CAUSE IS ASB407-02-54. REC. DOUBLERS AT RECEPTICALE AREAS.Aug 18, 2003 · N547AL · Bell 407 · Fuselage Miscellaneous StructureSDR ALGA088783Channel · crackedCHANNEL CRACKED LOWER EDGE AND MIDDLE DZUS RECEPTICALES AREA. PROBABLE CAUSE IS ASB407-02-54. REC. DOUBLERS AT RECEPTICALE AREAS.Aug 18, 2003 · N547AL · Bell 407 · Fuselage Miscellaneous StructureSDR ALGA088784Channel · crackedCHANNEL CRACKED LOWER EDGE AND MIDDLE CHANNEL. PROBABLE CAUSE IS ASB407-02-54. REC. DOUBLERS AT RECEPTICALE AREAS.Aug 18, 2003 · N547AL · Bell 407 · Fuselage Miscellaneous StructureSDR CA030725004Bearing · spalled(CAN) MAST REMOVED BECAUSE OF METAL CONTAMINATION, ROLLER FOUND SPALLED.Jul 24, 2003 · Bell 407 · Main Rotor Mast/SwashplateSDR 2003FA0000815Bearing · failedTHIS WAS THE REAR OIL COOLER FAN SHAFT BEARING. THIS IS PART OF THE TAIL ROTOR DRIVE SYSTEM FOR THIS AIRCRAFT. THE BEARING SUFFERED A COMPLETE FAILURE. BEARING BALLS WERE FOUND ON THE AIRCRAFT OIL COOLER DECK AREA ALONG WITH PIECES OF BEARING CAGE. ONE BALJul 17, 2003 · N702WP · Bell 407 · Engine Oil CoolerSDR ALGA088104Gear · spalledREMOVED GEAR FOR EXCESSIVE SPALLING ON GEAR TEETH.Jul 15, 2003 · N587AL · Bell 407 · Main Rotor GearboxSDR ALGA088105Gear · spalledREMOVED GEAR FOR EXCESSIVE SPALLING ON GEAR TEETH. REMOVED FOR WARRANTY CREDIT.Jul 15, 2003 · N587AL · Bell 407 · Main Rotor GearboxSDR ALGA087896Pinion Gear · galledENGINE REMOVED DUE TO METAL IN OIL. CAUSE FOUND TO BE GALLING ON PINION GER TEETH. REMOVED AND REPLACED PINION GEAR.Jul 1, 2003 · N547AL · Bell 407 · Accessory GearboxesSDR ALGA087760Bearing · failedTAIL ROTOR TRANSMISSION REMOVED FOR METAL IN OIL, FOUND BEARING BREAKING DOWN. SUBMITTED BY: PRESTON BARZAREJun 25, 2003 · N687AL · Bell 407 · Tail Rotor GearboxSDR ALG2003F00098Indicator · malfunctionedON TAKE OFF, DURING CLIMB THE TORQUE INDICATION WENT TO 103 PERCENT FOR 3-5 SECONDS AND (CHECK) INSTRUMENT LIGHT ILLUMINATED. TORQUE WAS REDUCED TO 93 PERCENT WITH MGT OF 650 DEGREES. CLIMB SPEED WAS 500 FPM, AIRCRAFT WAS RETURNED TO BASE. THE MECHANIC TROUJun 25, 2003 · N507AL · Bell 407 · Engine BMEP/Torque IndicatingSDR HEEA087837Battery · burnedBATTERY CELL BURNED ON CHARGE. REPLACED WITH SERVICEABLE PART.Jun 23, 2003 · N721PH · Bell 407 · Battery/Charger SystemSDR HEEA087835Bleed Valve · failedBLEED VALVE MAKING ENGINE RUN HOT. REPLACED WITH SERVICEABLE PART.Jun 20, 2003 · N406PH · Bell 407 · Compressor Bleed ValveSDR ALG2003F00066Hmu · leakingDURING REFUELING. AFTER A/C WAS REFUELED OFFSHORE AT WC-560. THE MECHANIC NOTICED A STEADY FLOW OF FUEL FROM THE OVERFLOW DRAIN LINE. HE INSPECTED THE LEAK AND FOUND THE HMU LEAKING. HE REMOVED AND REPLACED THE HMU AND COMPLIED WITH A LEAK CHECK AND AIRCRAJun 20, 2003 · N687AL · Bell 407 · Fuel Controlling SystemSDR HEEA087829Cartridge · failedLEFT BOOST LIGHT ILLUMINATED. REPLACED WITH SERVICEABLE PART.Jun 18, 2003 · N406PH · Bell 407 · Fuel Boost PumpSDR HEEA087834Seat · tornSEAT TORN. REPLACED WITH SERVICEABLE PART.Jun 17, 2003 · N407PH · Bell 407 · Passenger Compartment EquipmentSDR HEEA087830Cover · tornRT INSIDE TORN AND DETERIORATED. REPLACED WITH SERVICEABLE PART.Jun 15, 2003 · N612PH · Bell 407 · Emergency Flotation SectionSDR HEEA087831Tube · corrodedFUEL SYSTEM TUBE HAS CORROSION PITTING UNDER SLEEVE DUE TO IMPROPER PROTECTION DURING MANUFACTURING PROCESS. REPLACED WITH SERVICEABLE PART.Jun 14, 2003 · N491PH · Bell 407 · Fuel StorageSDR HEEA087832Door · corrodedINTAKE COWLING DOOR IS CORRODED AND CHAFED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART.Jun 14, 2003 · N491PH · Bell 407 · Nacelle/Pylon, Main FrameSDR HEEA087459Fuel Nozzle · intermittentFUEL NOZZLE HAS INTERMITTENT DELAYED STARTS. REPLACED FUEL NOZZLE.Jun 12, 2003 · N457PH · Bell 407 · Fuel Injector NozzleSDR HEEA087460Igniter · burnedDELAYED STARTS. IGNITER BURNED. REPLACED IGNITER.Jun 12, 2003 · N491PH · Bell 407 · Spark Plug/IgniterSDR HEEA087462Igniter · malfunctionedDELAYED LIGHT OFF. REPLACED IGNITER.Jun 12, 2003 · N491PH · Bell 407 · Spark Plug/IgniterSDR HEEA087463Igniter · wornIGNITER WORN. REPLACED IGNITER.Jun 12, 2003 · N494PH · Bell 407 · Spark Plug/IgniterSDR HEEA087464Igniter · wornIGNITER PRODUCING DELAYED LIGHT OFFS DUE TO WORN. REPLACED IGNITER.Jun 12, 2003 · N499PH · Bell 407 · Spark Plug/IgniterSDR HEEA087465Hose · corrodedFUEL HOSE HAS CORROSION AT SLEEVE ON BOTH ENDS. REPLACED HOSE.Jun 12, 2003 · N8595X · Bell 407 · Aircraft Fuel Distribution SystemSDR HEEA087469Hose · chafedHOSE ASSY HAS BEEN CHAFED TO THE STEEL BRAIDS FROM THE ENGINE COWLING SUPPORT. REPLACED HOSE.Jun 12, 2003 · N417PH · Bell 407 · Engine Fuel Distribution
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