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 HEEA080013Bleed Valve · failedHIGHER THAN NORMAL TOT. REPLACED WITH SERVICEABLE BLEED VALVE.Jun 10, 2002 · N724PH · Bell 407 · Compressor Bleed ValveSDR HEEA080014Valve · leakingLEAKS AND OPENS INTERMITTENTLY. REPLACED WITH SERVICEABLE VALVE.Jun 10, 2002 · N724PH · Bell 407 · Fuel Controlling SystemSDR HEEA080015Filter · bypassingENGINE OIL FILTER BYPASS INDICATOR OUT. REPLACED WITH SERVICEABLE FILTER.Jun 10, 2002 · N501PH · Bell 407 · Turbine Engine Oil SystemSDR HEEA080016Filter · bypassingCEFA LUBE SIDE BYPASS INDICATOR EXTENDED. REPLACED WITH SERVICEABLE FILTER.Jun 10, 2002 · N493PH · Bell 407 · Turbine Engine Oil SystemSDR HEEA080017Filter · bypassingBYPASS BUTTON POPPED. REPLACED WITH SERVICEABLE FILTER.Jun 10, 2002 · N719PH · Bell 407 · Turbine Engine Oil SystemSDR CA020605007Housing · mismanufactured(CAN) DURING AN OVERHAUL IT WAS FOUND THAT AN OIL PASSAGE WAS MISSING IN THE GEARBOX HOUSING BEARING BORE OF THE INPUT SHAFT DUPLEX BEARING. AFTER INVESTIGATION, IT WAS DETERMINED THAT ALL A/C FROM A/C S/N 53392 ARE AFFECTED AS ARE ALL SPARES SHIPPED SINCE AUGJun 4, 2002 · Bell 407 · Main Rotor HeadSDR JBZ2002F00000Head · damagedDURING INSPECTION, DAMAGE WAS NOTED ON TAIR ROTOR CROSSHEAD PITCH CHANGE ARMS CAUSED BY CONTACT WITH THE P/C LINKS.Jun 3, 2002 · N108SD · Bell 407 · Main Rotor HeadSDR HEEA079880Turbine Wheel · damagedENGINE REMOVED DUE TO VIBRATION AND MAKING LOUD NOISE. UPON INSPECTION OF TURBINE PARTS NOTED SULFIDATION ON NR 1 WHEEL LEADING EDGE BLADES. SCRAPPED PART.Jun 3, 2002 · N408PH · Bell 407 · Turbine SectionSDR HEEA079881Turbine Wheel · damagedENGINE REMOVED DUE TO NR 1 WHEEL DAMAGED. UPON INSPECTION OF TURBINE PARTS NOTED SULFIDATION ON NR 1 WHEEL LEADING EDGE BLADES. SCRAPPED PART.Jun 3, 2002 · N740PH · Bell 407 · Turbine SectionSDR HEEA079933Bleed Valve · failedENGINE PRODUCING HIGH MGT. REPLACED WITH SERVICEABLE BLEED VALVE.Jun 3, 2002 · N724PH · Bell 407 · Compressor Bleed ValveSDR HEEA079934Filter · bypassingENGINE OIL FILTER BYPASS POPPED. REPLACED WITH SERVICEABLE FILTER.Jun 3, 2002 · N498PH · Bell 407 · Turbine Engine Oil SystemSDR HEEA079935Filter · bypassingCEFA FILTER BUTTON BYPASSED. REPLACED WITH SERVICEABLE FILTER.Jun 3, 2002 · N8595X · Bell 407 · Turbine Engine Oil SystemSDR HEEA079937Ecu · damagedECU HAS A BROKEN CONNECTOR PIN.Jun 3, 2002 · N719PH · Bell 407 · Engine Fuel DistributionSDR HEEA079939Connector · corrodedFADEC FAULT AND FADEC DEGRADE LIGHT ILLUMINATED. ECU HAS CORROSION ON CONNECTOR AND HAD QUIET MODE SWITCH FAULT INDICATED. REPLACED WITH SERVICEABLE ECU.Jun 3, 2002 · N719PH · Bell 407 · Engine Fuel DistributionSDR HEEA079940Hmu · malfunctionedWHEN HMU IS PLACED IN MANUAL MODE, NG DECAYS TO 54.9 PERCENT WITH HORN COMING ON. REPLACED WITH SERVICEABLE HMU.Jun 3, 2002 · N723PH · Bell 407 · Fuel Controlling SystemSDR HEEA079955Fuel Nozzle · malfunctionedDELAYED LIGHT OFF. NOZZLE FLOW RATE TESTED AT THE MINIMUM FLOW RATE AT 125 PSIG. INSPECTED NOZZLE UNDER MAGNIFICATION, CHECK OK. RE-SHIMMED TO ADJUST FUEL RATE TO A HIGHER SETTING. UNIT TESTED SATISFACTORY.Jun 3, 2002 · N510PH · Bell 407 · Fuel Injector NozzleSDR CA041214010Combustion Liner · cracked(CAN) CRACK FOUND DURING REMOVAL FOR UNRELATED TURBINE CEB. NO CRACKS ALLOWED IN SUBJECT AREA.Jun 3, 2002 · Bell 407 · Turbine Engine Combustion SectionSDR ALGA079297Gear · spalledGEARBOX WAS REMOVED FOR CORRODED STUDS, DURING INSPECTION FOUND SPALLING ON PINION GEAR TEETH.May 29, 2002 · N497AL · Bell 407 · Turbine Engine Reduction GearSDR ALGA079294Pinion Gear · galledFOUND EXCESSIVE GALLING ON PINION GEAR, SPALLING AND GALLING ON T/M GEAR. BOTH GEARS HAVE VERY UNUSUAL WEAR PATTERN. ENTRY MADE BY RNBMay 28, 2002 · N577AL · Bell 407 · Turbine Engine Reduction GearSDR ALGA079295Gear · galledFOUND EXCESSIVE GALLING ON PINION GEAR, SPALLING AND GALLING ON T/M GEAR. BOTH GEARS HAVE VERY UNUSUAL WEAR PATTERN. ENTRY MADE BY RNB.May 28, 2002 · N577AL · Bell 407 · Turbine Engine Reduction GearSDR ALGA079296Bearing · galledT/M JOURNAL AND INNER RACE FOUND EXCESSIVE GALLING, CAUSING METAL CONTAMINATION.May 28, 2002 · N577AL · Bell 407 · Turbine Engine Reduction GearSDR TI12002F00002Bearing · separatedAN ABNORMAL INTERMITTENT VIBRATION WAS FELT DURING CRUISE FLIGHT. THE CAUSE WAS DETERMINED TO BE THE OUTBOARD MAIN ROTOR GRIP ELASTOMERIC BEARING ON ONE BLADE GRIP TO HAVE SEPARATED. THE OTHER THREE ELASTOMERIC BEARING WERE INSPECTED, AND FOUND TO HAVE VARIOMay 22, 2002 · N2022Y · Bell 407 · Main Rotor HeadSDR HEEA078705Liner · crackedWORN NOZZLE FERRULE AND CRACKS IN VARIOUS WELDMENTS.May 15, 2002 · N612PH · Bell 407 · Turbine Engine Combustion SectionSDR 2002FA0000706Gear · rough(TM GEAR) UPON VISUAL INSPECTION OF PART. FOUND EXTREMELY ROUGH GEAR TEETH EDGES AT RADIUS ON FORWARD TEETH. SENT FOR WARRANTY.May 14, 2002 · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00035Bearing · galledENGINE WAS REMOVED DUE TO CHIP LIGHT. GEARBOX WAS DISASSEMBLED TO FIND SOURCE OF METAL. UPON REMOVAL OF T/M JOURNAL AND INNER RACE FOUND EXCESSIVE GALLING, CAUSING METAL CONTAMINATION. ASSURE BEARINGS AND INNER RACE CAN WITH STAND HIGH LOADING CAPACITY.May 12, 2002 · N577AL · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00039Pinion Gear · wornENGINE WAS REMOVED DUE TO CHIP LIGHT. GEARBOX WAS DISASSEMBLED TO FIND SOURCE OF METAL. FOUND EXCESSIVE GALLING ON PINION GEAR, SPALLING AND GALLING ON T/M GEAR. BOTH GEARS HAVE VERY UNUSUAL WEAR PATTERN. ASSURE PROPER MESHING AND MACHINING OF GEAR TEETH May 12, 2002 · N577AL · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00040Pinion Gear · wornENGINE WAS REMOVED DUE TO CHIP LIGHT. GEARBOX WAS DISASSEMBLED TO FIND SOURCE OF METAL. FOUND EXCESSIVE GALLING ON PINION GEAR, SPALLING AND GALLING ON T/M GEAR. BOTH GEARS HAVE VERY UNUSUAL WEAR PATTERN. ASSURE PROPER MESHING AND MACHINING OF GEAR TEETH AMay 12, 2002 · N577AL · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00043Gear · galledENGINE WAS REMOVED DUE TO CHIP LIGHTS. UPON VISUAL INSPECTION FOUND CAUSE OF METAL DUE TO GALLING T/M AND PTO GEARS. DUE TO T/M JOURNAL SUPPORT STUDS BACKING OUT OF COVER AN UNUSUAL WEAR PATTERN OF SPALLING AND GALLING OCCURRED ON GEAR TEETH. THIS COULD HAVMay 12, 2002 · N687AL · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00044Cover · wornENGINE HAD CHIP LIGHTS. UPON DISASSEMBLY OF GEARBOX FOUND T/M JOURNAL SUPPORT STUDS BACKED OUT OF COVER. FOUND T/M GEAR, BEARING JOURNAL SHAFT AND SUPPORT LOOSE IN COVER ASSEMBLY. FOUND ALL 4 STUDS ON JOURNAL SUPPORT PULLED OUT AND 1 EACH WITH NO THREADS LEMay 12, 2002 · N687AL · Bell 407 · Turbine Engine Reduction GearSDR AO52002F00000Float · corrodedFLOAT WAS INSPECTED, AND WAS DETERMINED TO BE EXTREMELY CORRODED AND IN AN IMMANENT FAILURE CONDITION.May 10, 2002 · N973AA · Bell 407 · Emergency Flotation SectionSDR ALG2002F00064Pinion Gear · failedUPON DISASSEMBLY OF GEARBOX DUE TO CHIP LIGHT. FOUND EXCESSIVE GALLIN ON PINION AND T/M GEARS. T/M GEAR HAD ROUGH EDGES CAUSING PINION GEAR TO GALL. ASSURE PROPER MACHINING AND MESHING OF GEAR TEETH AT FACTORY.May 8, 2002 · N647AL · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00047Pinion Gear · wornUPON DISASSEMBLY OF GEARBOX. UPON DISASSEMBLY OF GEARBOX FOUND EXCESSIVE GALLING AND SPALLING AND WEAR IN GEAR TEETH AND UNEVEN WEAR AND HEAVY SPALLING OF T/M GEAR TEETH. ASSURE PROPER MESHING OF GEAR TEETH.May 2, 2002 · N403AL · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00048Cover · stripped(GEARBOX COVER) UPON DISASSEMBLY OF GEARBOX, FOUND 1 EACH STRIPPED STUD AND 2 EACH LOOSE STUDS AT 2.5 BEARING CAGE MATING SURFACE, ALSO FOUND 2 EACH STUDS AT TM SUPPORT JOURNAL LOOSE. NOTE: AT LOCATION OF STRIPPED STUD ON T.5 BEARING CAGE SURFACE, FOUND NO TMay 2, 2002 · N403AL · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00037Gear · spalledGEARBOX WAS RECEIVED FOR CORRODED STUDS. UPON INITIAL VISUAL INSPECTION FOUND SPALLING PINION GEAR TEETH. EXCESSIVE SPALLING AND LIGHT GALLING ON GEAR TEETH DUE TO IMPROPER MESHING OF TM AND PINION GEARS. ASSURE PROPER MESHING OF GEAR TEETH AT FACTORY.Apr 30, 2002 · N497AL · Bell 407 · Turbine Engine Reduction GearSDR AUS20020414Bolt · failed(AUS) MAIN DRIVESHAFT, FLEXOR BOLT MISSING. INVESTIGATION FOUND THAT THE BOLT HAD FRACTURED INTO TWO PIECES.Apr 26, 2002 · Bell 407 · Engine/Transmission CouplingSDR ALG2002F00041Pinion Gear · galledGEARBOX WAS REMOVED DUE TO FWU BORE DAMAGE. UPON INSPECTION OF CHIP DETECTORS, FOUND METAL ON BOTH PLUGS. AFTER DISASSEMBLY FOUND EXCESSIVE GALLING ON TM AND PINION GEARS CAUSE FOR METAL. METAL CONTAMINATION WAS GENERATED FROM UNFINISHED MACHINING OF TM GEAApr 25, 2002 · N467AL · Bell 407 · Turbine Engine Reduction GearSDR ALG2002F00042Gear · mismanufacturedGEARBOX WAS REMOVED DUE TO FWU BORE DAMAGE. UPON INSPECTION OF CHIP DETECTORS, FOUND METAL ON BOTH PLUGS. AFTER DISASSEMBLY FOUND EXCESSIVE GALLING ON TM AND PIINION GEARS CAUSE FOR METAL. METAL CONTAMINATION WAS GENERATED FROM UNFINISHED MACHINING OF TM GEApr 25, 2002 · N467AL · Bell 407 · Turbine Engine Reduction GearSDR R7M5342235164Indicator · inoperativeTORQUE INDICATOR UNIT INOPERATIVE. WILL NOT POWER DOWN CORRECTLY AND READS 5 PERCENT HIGHER THAN ECU. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Apr 23, 2002 · N407SJ · Bell 407 · Engine BMEP/Torque IndicatingSDR R7MR534223515Blade · out of balanceTAIL ROTOR BLADE HAS AN OUT OF BALANCE CONDITION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Apr 18, 2002 · N407SJ · Bell 407 · Tail Rotor BladesSDR 2002FA0000708Gear · mismanufacturedUPON VISUAL INSPECTION OF NEW PARTS FROM STOCK, IMPROPER AND UNFINISHED MACHINING AND MESHING OF GEAR TEETH AT RADIUS.Apr 16, 2002 · Bell 407 · Turbine Engine Reduction GearSDR R7M5344635168Bearing · debondedMAIN ROTOR BEARING DEBONDING. REPLACED WITH NEW UNIT, CORRECTED.Apr 15, 2002 · N911LN · Bell 407 · Main Rotor HeadSDR R7M5342235163Indicator · stuckTORQUE INDICATOR INOPERATIVE, INDICATOR STUCK AT 82 PERCENT, THEN WENT TO FULL DEFLECTION, THEN WENT DEAD. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Apr 5, 2002 · N407SJ · Bell 407 · Engine BMEP/Torque IndicatingSDR R7M5342235162Housing · frettedHOUSING TO ENGINE MOUNT IS EXCESSIVELY FRETTED. HOUSING MOUNT BOLTS WERE NOT LOOSE AS THOSE FOUND IN AC. REPLACED WITH NEW UNIT CORRECTED PROBLEM.Apr 4, 2002 · N407SJ · Bell 407 · Engine Mount SectionSDR R7M2002F00013Gps · inoperativeGPS 430 UNIT INOPERATIVE. UNIT WILL NOT VDR LOCK IN VOR FREQUENCIES, ILS OR VOR STATIONS. MESSAGE INDICATES CDI INOPERATIVE WHEN SWITCHING TO VLOC MODE. ALSO, UNIT WILL NOT INDICATE GPS MODE ON THE SCREEN (LOWER LT CORNER). REPLACED WITH LOANER UNIT CORREMar 29, 2002 · N407SJ · Bell 407 · Global Positioning SystemSDR HEEA078512Harness · failedFADEC FAILURE DUE TO SHORT BETWEEN PINS U & V OF HMU CONNECTOR. REPLACED WITH SERVICEABLE HARNESS.Mar 25, 2002 · N492PH · Bell 407 · Turbine Engine System WiringSDR HEEA078513Harness · failedFADEC FAIL AND FADEC FAULT LIGHTS KEEP COMING ON. REPLACED WITH SERVICEABLE HARNESS. TO BE SENT TO BELL HELICOPTER TEXTRON FOR CREDIT.Mar 25, 2002 · N8595X · Bell 407 · Turbine Engine System WiringSDR HEEA078529Igniter · failedDELAYED STARTING. SCRAPPED LOCALLY DUE TO WORN BEYOND LIMITS.Mar 25, 2002 · N8595X · Bell 407 · Spark Plug/IgniterSDR ALG2002F00028Cowling · corrodedREBUILD. EXCESSIVE CORROSION, CRACKING AND WEAR ON COWLING AND INTAKE SHELF.Mar 24, 2002 · N427AL · Bell 407 · Engine Air Intake SystemSDR HEEA078252Engine · failedFADEC FAILURE ON ENG START. TOT MAXED AT 1063 DEGREES. RETURNED ENGINE TO ROLLS ROYCE FOR REPAIRMar 22, 2002 · N4999 · Bell 407 · Engine (Turbine/Turboprop)SDR HEEA078254Ecu · failedFADEC FAILURE ON ENG. START. T.O.T. MAXED AT 1063 DEGREES. RETURNED TO ROLLS ROYCEMar 22, 2002 · N4999 · Bell 407 · Engine (Turbine/Turboprop)
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