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 HEEA078383Bleed Valve · failedHIGH TOT. REPLACED WITH SERVICEABLE BLEED VALVE.Mar 22, 2002 · N723PH · Bell 407 · Compressor Bleed ValveSDR HEEA078384Bleed Valve · failedFAILED POWER ASSURANCE CHECK. REPLACED WITH SERVICEABLE BLEED VALVE.Mar 22, 2002 · N723PH · Bell 407 · Compressor Bleed ValveSDR HEEA078385Combustion Liner · crackedCOMBUSTION LINER CRACKED AT FUEL NOZZLE MOUNT BOSS.Mar 22, 2002 · N491PH · Bell 407 · Turbine Engine Combustion SectionSDR HEEA078386Sensor · malfunctionedCAUSING NP1, NP1 RATE, OS, NPOS AND NPD FAULTS TO FADEC SYSTEM. REPLACED WITH SERVICEABLE PICKUP ASSY.Mar 22, 2002 · N8595X · Bell 407 · Fuel Control/Turbine EnginesSDR HEEA078388Igniter Box · intermittentIGNITER WORKS INTERMITTENTLY. REPLACED WITH SERVICEABLE PART.Mar 22, 2002 · N496PH · Bell 407 · Spark Plug/IgniterSDR HEEA078389Liner · chafedCHAFING ON FUEL NOZZLE. REPLACED WITH SERVICEABLE PART.Mar 22, 2002 · N491PH · Bell 407 · Turbine Engine Compressor SectionSDR HEEA078391Hmu · failedELONGATED DRIVE PIN HOLE, FAILED 300 HOUR BACKLASH INSPECTION. REPLACED WITH SERVICEABLE PART.Mar 22, 2002 · N496PH · Bell 407 · Fuel Controlling SystemSDR HEEA078392Hmu · failedWHEN SWITCH TO MANUAL MODE, ENGINE HAS HIGH ACCELERATION. REPLACED WITH SERVICEABLE PART.Mar 22, 2002 · N496PH · Bell 407 · Fuel Controlling SystemSDR ALG2002F00018Sprag Clutch · wornDURING OVERHAUL FOUND, CAGE SLOTS WORN BEYOND MAX. LIMIT, 1 EACH SPRAG BREAKING DOWN ON INNER CAM FACE. TO PREVENT RECURRENCE: STRONGER ALLOY.Mar 18, 2002 · N607AL · Bell 407 · Engine/Transmission CouplingSDR ALG2002F00019Spline Adapter · wornDURING OVERHAUL, FOUND SPLINE WEAR BELOW MIN.Mar 18, 2002 · N607AL · Bell 407 · Engine/Transmission CouplingSDR ALG2002F00027Gear · galledUPON DISASSEMBLY AND INSPECTION OF GEARBOX BEARINGS AND GEARS. FOUND ROUGH SURFACE AT GEAR TEETH EDGE NEAR RADIUS OF TM GEAR, CAUSING GALLING ON PINION GEAR AND METAL CONTAMINATION. ASSURE PROPER MACHINE AND MESHING OF GEAR TEETH AT FACTORY.Mar 18, 2002 · N847AL · Bell 407 · Main Rotor GearboxSDR R7M2002F00002Shaft · out of balanceSHAFT ASSEMBLY BEARING HANGAR OUT OF BALANCE FROM FACTORY. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 15, 2002 · N200LN · Bell 407 · Tail Rotor Drive ShaftSDR R7M2002F00001Shaft · out of balanceSHAFT ASSEMBLY, BEARING HANGAR- OUT OF BALANCE FROM FACTORY. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 14, 2002 · N200LN · Bell 407 · Tail Rotor Drive ShaftSDR R7MR35455Bearing · roughTAIL ROTOR HANGER BALL BEARING, ROUGH. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 14, 2002 · N407SJ · Bell 407 · Tail Rotor Drive ShaftSDR R7MR35456Bearing · roughHANGER TAIL ROTOR BALL BEARING, ROUGH. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 14, 2002 · N407SJ · Bell 407 · Tail Rotor Drive ShaftSDR R7MR35457Bearing · roughHANGAR TAIL ROTOR BALL BEARING, ROUGH. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 14, 2002 · N407SJ · Bell 407 · Tail Rotor Drive ShaftSDR R7MR35458Bearing · roughHANGAR TAIL ROTOR BALL BEARING, ROUGH. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 14, 2002 · N407SJ · Bell 407 · Tail Rotor Drive ShaftSDR 2002FA0000707Gear · mismanufactured(TM GEARS) UPON VISUAL INSPECTION OF NEW PART FROM STOCK. IMPROPER AND UNFINISHED MACHINING ON GEAR TEETH AT RADIUS.Feb 27, 2002 · Bell 407 · Turbine Engine Reduction GearSDR HEEA078070Transducer · failedTRANSDUCER CAUSES ENGINE DECELERATION ON TAKE OFF.Feb 26, 2002 · N510PH · Bell 407 · Fuel Controlling SystemSDR C1Y2002F00000Shutoff Valve · failedCABIN HEATER SHUTOFF VALVE (PN ES26185-1) WOULD CONTINUALLY TRIP THE CIRCUIT BREAKER. INSTALLED NEW VALVE. HEATER OPERATION BACK TO NORMAL.Feb 26, 2002 · N407LG · Bell 407 · Heating SystemSDR ALG2002F00024Turbine Wheel · corrodedTURBINE WAS RECEIVED IN SHOP FOR LOW POWER. FOUND AFTER REMOVAL OF COMBUSTION SECTION FOUND SULPHADATION ON 1ST STAGE WHEEL.Feb 17, 2002 · N587AL · Bell 407 · Turbine SectionSDR R7M2002F00014Indicator · intermittentTORQUE INDICATOR OPERATES INTERMITTENTLY. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 15, 2002 · N407SJ · Bell 407 · Main Rotor Indicating SystemSDR ALG2002F00013Hose · crackedHYDRAULIC SYSTEM, DEFECT FOUND DURING UNSCHEDULED MAINTENANCE. SOCKET CRACKED.Feb 4, 2002 · N457AL · Bell 407 · Hydraulic System, MainSDR ALG2002F00021Crosstube · corrodedDURING DAILY INSPECTION, FOUND PITTING CORROSION ON CROSSTUBE .2500 INCH DEEP .5000 INCH ROUND. SCRAPPED CROSSTUBE. PROBABLE CAUSE IS WATER ENTRAPMENT. ALMOST UNDETECTABLE WITH ALL PARTS INSTALLED.Feb 4, 2002 · N477AL · Bell 407 · Main Landing Gear Strut/Axle/TruckSDR ALG2002F00022Crosstube · corrodedDAILY SERVICE CHECK, FOUND PITTING CORROSION ON CROSSTUBE AT STRAP ATTACH POINT. PROBABLE CAUSE IS WATER ENTRAPMENT. SCRAP CROSSTUBE.Feb 4, 2002 · N477AL · Bell 407 · Main Landing Gear Strut/Axle/TruckSDR R7MR35009Indicator · inoperativeFUEL PRESSURE/AMMETER INDICATOR INOPERATIVE. FUEL PRESSURE PEGGED OUT ON HIGH SIDE OF SCALE. ALSO, INDICATOR FLUCTUATES WHEN GENERATOR TURNED ON. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jan 28, 2002 · N107LN · Bell 407 · Fuel Pressure IndicatorSDR WIP2002F00001Switch · failedFUEL PRESS SWITCH FAILED, REMOVED AND REPLACED WITH NEW.Jan 25, 2002 · N911FS · Bell 407 · Fuel Pressure IndicatingSDR ALG2002F00011Pinion Gear · galledCHIP LIGHT LUMINATED, HAVING METAL IN OIL. UPON DISASSEMBLY OF GEARBOX, FOUND EXCESSIVE GALLING ON GEAR TEETH (PINION GEAR). EXCESSIVE GALLING ON PINION GEAR DUE TO IMPROPER GEAR MESHING AND EXCESSIVE LOAD TO TORQUE AREA. INSURE GEAR HARDNESS AND PROPER MESJan 25, 2002 · N937AL · Bell 407 · Main Rotor GearboxSDR ALG2002F00012Bearing · improper partUPON REPAIRS OF GEARBOX, BEARING RACE HAVING TWO SERIAL NUMBERS ETCHED ON RACE. TO PREVENT RECURRENCE: PROPER IDENTIFICATION OF PART BEFORE LEAVING FACTORY.Jan 25, 2002 · N937AL · Bell 407 · Main Rotor GearboxSDR ALG2002F00014Shaft · wornINPUT SHAFT, DURING 2500 HOUR OVERHAUL, SPLINES WORN BELOW MINIMUM LIMITS.Jan 24, 2002 · N58236 · Bell 407 · Engine/Transmission CouplingSDR ALG2002F00015Bearing · wornDURING PREVENTATIVE MAINTENANCE INSPECTION, BEARINGS ROUGH AND WORN/ BEARINGS SCRAPPED. BEARINGS SHOULD BE MOUNTED IN SELF-CENTERING HOUSING.Jan 20, 2002 · N627AL · Bell 407 · Tail Rotor Drive ShaftSDR CA020206001Compressor · cracked(CAN) A ONE INCH LONG CRACK WAS DISCOVERED BY MAINTENANCE PERSONNEL DURING A SCHEDULED EVENT NR 5 INSPECTION. THE CRACK WAS FOUND ON THE UPPER HALF OF THE WELD ON THE RIGHT SIDE OF THE COMPRESSOR SCROLL ASSEMBLY. WHEN THE AIRCRAFT WAS GROUND RUN AIR WAS FELT EJan 20, 2002 · Bell 407 · Turbine Engine Compressor SectionSDR ALG2002F00009Bearing · failedDURING PREVENTATIVE MAINTENANCE INSPECTION, BEARING FAILED COMPLETELY, PART SCRAPPED.Jan 19, 2002 · N587AL · Bell 407 · Tail Rotor Drive ShaftSDR WIP2002F00002Reducer · failedREDUCER TUBE ASSEMBLY, REMOVED HYDRAULIC REDUCER AND TUBE ASSEMBLY, INSTALLED NEW REDUCER AND TUBE ASSEMBLY.Jan 9, 2002 · N911FS · Bell 407 · Hydraulic System, MainSDR WIP2002F00000Bearing · failedMAIN ROTOR BEARING FAILIED.Jan 4, 2002 · N911FS · Bell 407 · Tail Rotor Drive ShaftSDR ALG2002F00006Disc Pack · brokenDURING 25 HOUR AD INSPECTION, BROKEN DISC IN DISC PACK. ALLOW TAIL ROTOR DRIVE SHAFT TO FLOAT SO DISC PACKS DO NOT FLEX AS MUCH OR AS OFTEN.Dec 20, 2001 · N577AL · Bell 407 · Tail Rotor Drive ShaftSDR AUS20011458Cable · failed(AUS) RESCUE HOIST CABLE BROKE IN AN AREA APPROXIMATELY 100MM (4IN) ABOVE RESCUE HOOK ATTACHMENT POINT.Dec 20, 2001 · Bell 407 · Emergency EquipmentSDR ALG2002F00003Link · corrodedIN SHOP REPAIR, EXCESSIVE CORROSION AROUND BUSHINGS AND UNDER BUSHINGS. BETTER ALLOYS, BETTER PRIMER AND SURFACE TREATMENT RECOMMENDED.Dec 18, 2001 · N547AL · Bell 407 · Main Rotor Mast/SwashplateSDR R7MR34404Panel · crackedPANEL CRACKED BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 13, 2001 · N407SJ · Bell 407 · Fuselage Main, Plate/SkinSDR R7MR34312Search Light · inoperativeSEARCH LIGHT ASSEMBLY, UNIT INOPERATIVE. WILL NOT POWER DOWN WHEN SWITCH IS TURNED OFF. GEARS ARE NOISY WHEN LIGHT ROTATES IN STOW POSITION (BEFORE LIGHT PARKS IN CENTER POSITION). REPLACED WITH REPAIRED UNIT, CORRECTED PROBLEM.Dec 11, 2001 · N107LN · Bell 407 · Exterior LightingSDR R7M2002F00033Shaft · wornSHAFT SPLINES WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 11, 2001 · N911LN · Bell 407 · Tail Rotor Drive ShaftSDR R7MR34297Blade · debondedBLADE MR 407(HIGH VISIBILITY), DEBONDING UNDER EROSION STRIP, NEAR BLADE TIP. REPLACED WITH USED BLADE CORRECTED PROBLEM.Dec 10, 2001 · N107LN · Bell 407 · Main Rotor BladesSDR CA011130006Bearing · failed(CAN) WHILE ON 5TH SCENIC TOUR OF DAY, AT 2,500 FT ASL IN QUIET MODE CRUISE, A/C SOUND & VIBRATION LEVEL SUDDENLY CHANGED FROM NORMAL TO LOUD WITH HEAVY VIBRATION FROM TAIL ROTOR DRIVE AREA. PILOT IMMEDIATELY RETURNED A/C TO NORMAL MODE CRUISE RPM & EXITED SCNov 24, 2001 · Bell 407 · Tail Rotor Drive SystemSDR R7MR34292Search Light · inoperativeSEARCH LIGHT ASSEMBLY, UNIT INOPERATIVE. LAMP WOULD NOT TURN OFF UNTIL THE MASTER WAS SWITCHED OFF. WHEN THE MASTER WAS SWITCHED BACK ON, THE LIGHT WOULD NOT COME BACK ON. REPLACED WITH LOANER UNIT CORRECTED PROBLEM.Nov 21, 2001 · N107LN · Bell 407 · Exterior LightingSDR R7MR34291Search Light · inoperativeSEARCH LIGHT ASSEMBLY, UNIT INOPERATIVE. UNIT STOPPED ROTATING LEFT OR RIGHT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.(K)Nov 19, 2001 · N107LN · Bell 407 · Exterior LightingSDR R7MA33724Bearing · wornWORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 13, 2001 · N407SJ · Bell 407 · Tail Rotor Drive ShaftSDR R7MA33726Sensor · inoperativeUNIT INOPERATIVE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 13, 2001 · N407SJ · Bell 407 · Fuel Controlling SystemSDR R7MA33727Switch · stuckSTICKS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 13, 2001 · N407SJ · Bell 407 · Electrical Power SystemSDR R7MR34243Gps · inoperativeGNS430,GLOBAL NAVIGATIONAL SYSTEM, UNIT INOPERATIVE. WILL NOT TRANSMIT ON COMM SIDE, AT ANY FREQUENCY.Nov 1, 2001 · N407SJ · Bell 407 · Global Positioning SystemSDR HEEA077023Valve · stuckANTI ICE VALVE STICKS IN ON POSITION INTERMITTENTLY. REPLACED WITH SERVICEABLE PART.Oct 31, 2001 · N495PH · Bell 407 · Engine Anti-Icing System
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