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 CA011119004Blade · cracked(CAN) DURING AIRFRAME PERIODIC INSP 3.5 INCH DIAGNAL CRACK ON LOWER SKIN OF SUBJECT BLADE FOUND AT BLADE STATION 71.0-73.0.ATTEMPTS TO DRESS OUT CRACK WITH LIGHT SANDING REVEALED SUSPECT LACK OF FIBERGLASS MATTING USED IN CONSTRUCTION OF BLADE TYPE. EVIDENCED Oct 31, 2001 · Bell 407 · Main Rotor BladesSDR HEEA076897Bleed Valve · failedLOW POWER ENGINE. IN SHOP REPAIR.Oct 24, 2001 · N4999 · Bell 407 · Compressor Bleed ValveSDR 2001FA0000488Bolt · brokenDURING PREFLIGHT PILOT FOUND TAILBOOM BOLT MOVED. MAINTENANCE REMOVED COVER FOUND BOLT SAFETIED, BUT BROKEN 2.5 THREADS FROM SHANK BOLT REMOVED AND REINSTALLED 265.2 HOURS BEFORE.Oct 23, 2001 · N959SD · Doug 600N · Rotorcraft Tail BoomSDR ALG2002F00002Pitch Horn · corrodedAFTER DISASSEMBLY, CLEANING AND STRIPPING PAINT FOR OVERHAUL. CORROSION ON ENTIRE SURFACE BEYOND LIMITS DUE TO POOR METAL QUALITY AND POOR PRIME AND PAINT. BETTER QUALITY ALUMINUM AND PAINTING PROCEDURES RECOMMENDED.Oct 23, 2001 · N687AL · Bell 407 · Tail Rotor HeadSDR R7MR34253Valve · leakingVALVE, UNIT INOPERATIVE. FAILS TO STOP FLOW OF HYDRAULIC PRESSURE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.(K)Oct 22, 2001 · N911LN · Bell 407 · Hydraulic Pressure Relief Valve, MainSDR R7MR34290Search Light · malfunctionedSEARCH LIGHT ASSEMBLY, UNIT INOPERATIVE. UNIT WILL ONLY EXTEND AND RETRACT, WILL NOT ROTATE LEFT OR RIGHT. LIGHT IS STUCK SLIGHTLY TO THE RIGHT OF CENTER. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.(K)Oct 11, 2001 · N107LN · Bell 407 · Exterior LightingSDR R7MA33894Gyro · precessesUNIT INOPERATIVE. PRECESES. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 9, 2001 · N407SJ · Bell 407 · Directional Gyro and Indicating SystemSDR ALG2001F00036Ring · corrodedDURING PHASE INSPECTION. CORROSION BEYOND MAXIMUM LIMITS.Oct 9, 2001 · N587AL · Bell 407 · Main Rotor Mast/SwashplateSDR ALG2001F00043Link · corrodedDURING PHASE INSPECTION. CORROSION BEYOND MAXIMUM LIMITS. RETURN TO 206 SERIES ALLOY USED ON LINKS AND LEVERS. BETTER ALLOY AND/OR SURFACE PROTECTION.Oct 9, 2001 · N427AL · Bell 407 · Main Rotor ControlSDR ALG2001F00045Frame · crackedDAILY INSPECTION, CRACKED DOUBLER AND FRAME AT RIGHT HAND NUT PLATE TAB.Oct 8, 2001 · N937AL · Bell 407 · Fuselage Main, StructureSDR ALG2001F00039Disc Pack · crackedDURING 25 HOUR AD INSPECTION, FOUND TAIL ROTOR DRIVESHAFT DISC CRACKED.Oct 5, 2001 · N627AL · Bell 407 · Tail Rotor Drive ShaftSDR R7MR34252Indicator · inoperativeINDICATOR, MGT, UNIT INOPERATIVE. BAD MEMORY WILL NOT HOLD EXCEEDANCES. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 5, 2001 · N911LN · Bell 407 · Rotor Drive Indicating SystemSDR AUS20011060Vane · cracked(AUS) COMPRESSOR SCROLL ASSEMBLY RT TURNING VANE CRACKED. A PIECE OF THE VANE APPROXIMATELY 38.1MM BY 17.78MM (1.5IN BY 0.7IN) WAS MISSING. A SMALL PIECE OF THE LT VANE ALSO APPEARS TO BE MISSING.Oct 4, 2001 · Doug 600N · Turbine Engine Compressor SectionSDR 2001FA0000536Exciter · failedENGINE FAILED TO START. IGNITORS WERE NOT HEARD AS NORMALLY HEARD. IGNITOR WAS REPLACED WITH NEGATIVE RESULTS. IGNITION EXCITOR REPLACED WITH NEW, RESOLVING DESCREPANCY.Oct 3, 2001 · N17SP · Bell 407 · ExciterSDR HEEA076388Valve · stuckVALVE STICKING. REPLACED WITH SERVICEABLE VALVE.Oct 3, 2001 · N724PH · Bell 407 · Fuel Controlling SystemSDR ALG2001F00037Bearing · delaminatedON DAILY INSPECTION, DELAMINATED ELASTOMER ON BEARING.Oct 3, 2001 · N617AL · Bell 407 · Main Rotor HeadSDR ALG2001F00041Bearing · failedUPON DISASSEMBLY OF GEARBOX DUE TO CHIP LIGHT. NR 4 BEARING FAILURE. TOOTH MISSING FROM GEAR ON PINION GEAR, AND DAMAGED GEAR TEETH ON T/M GEAR.Oct 3, 2001 · N497AL · Bell 407 · Turbine Engine Accessory DriveSDR ALG2001F00044Disc Pack · crackedDAILY INSPECTION OF TAILROTOR HANGER BEARINGS. CRACKED DISC NR5 AND NR6 TAILROTOR HANGER BEARINGS. ALLOW THE TAILROTOR DRIVESHAFT TO FLOAT SO DISC PACKS DO NOT FLEX AS MUCH OR AS OFTEN.Oct 3, 2001 · N427AL · Bell 407 · Tail Rotor Drive ShaftSDR HEEA076324Bleed Valve · failedHIGH MGT. REPLACED WITH SERVICEABLE BLEED VALVE.Oct 2, 2001 · N496PH · Bell 407 · Compressor Bleed ValveSDR HEEA076325Harness · failedFADEC DEGRADE LIGHT ILLUMINATED ON SHUTDOWN.Oct 2, 2001 · N405PH · Bell 407 · Turbine Engine System WiringSDR HEEA076326Harness · failedCONSTANT FADEC DEGRADE LIGHT. TO BE SENT TO VENDOR FOR CREDIT.Oct 2, 2001 · N405PH · Bell 407 · Turbine Engine System WiringSDR HEEA076327Harness · failedFADEC DEGRADE LIGHT. TO BE SENT TO VENDOR FOR CREDIT.Oct 2, 2001 · N496PH · Bell 407 · Turbine Engine System WiringSDR HEEA076328Harness · failedSHORT BETWEEN PIN D & C OF TORQUE TRANSMITTER CONNECTOR. TO BE SENT TO VENDOR FOR CREDIT.Oct 2, 2001 · N405PH · Bell 407 · Turbine Engine System WiringSDR HEEA076329Ecu · malfunctionedCONTINUES TO HAVE NPOS & OS FAULTS. TO BE SENT TO VENDOR FOR REPAIR.Oct 2, 2001 · N490PH · Bell 407 · Engine Indicating SystemSDR ALG2002F00017Bearing · making metalMETAL WAS FOUND ON CHIP PLUGS, ENGINE AND GEARBOX DISASSEMBLED FOR INSPECTION. FOUND CAUSE FOR METAL DUE TO INNER RACE GALLING ON T/M JOURNAL BEARING, CAUSING METAL CONTAMINATION THROUGHOUT GEARBOX.Sep 30, 2001 · N577AL · Bell 407 · Main Rotor GearboxSDR ALG2001F00046Wheel · corrodedDURING INSPECTION FOR METAL IN OIL, SULFIDATION ON BLADES. ENSURE PROPER COATING APPLIED.Sep 29, 2001 · N937AL · Bell 407 · Turbine SectionSDR ALG2001F00038Bearing · failedBEARING FAILED, COMPLIED WITH ASB 407-01-44.Sep 28, 2001 · N406AL · Bell 407 · Tail Rotor Drive ShaftSDR 2001FA0000450Blade · debondedFOUND OVAL SHAPED AREA ON OUTSIDE OF TAIL ROTOR BLADE DEBONDED. 11 INCHES FROM BLADE ROOT TO 17 INCHES FROM BLADE ROOT. 1 INCH FROM TRAILING EDGE TO 3 INCHES FROM TRAILING EDGE OF BLADE.Sep 25, 2001 · N407AK · Bell 407 · Tail Rotor BladesSDR R7MR34250Blower · inoperativeBLOWER ASSEMBLY, UNIT INOPERATIVE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Sep 20, 2001 · N107LN · Bell 407 · Air Distribution FanSDR R7MA33721Valve · stuckSTUCK IN OPEN POSITION. REPLACED WITH NEW UNIT CORRECTED PROBLEM.Sep 19, 2001 · N407SJ · Bell 407 · Engine Air Intake SystemSDR R7MA33732Gps · inoperativeWILL NOT TRANSMITT, BUT WILL RECEIVE. REPLACED WITH LOANER UNIT CORRECTED PROBLEM.Sep 18, 2001 · N407SJ · Bell 407 · Global Positioning SystemSDR ALG2001F00018Bearing · damagedTAILROTOR DRIVESHAFT BEARINGS, DURING DAILY INSPECTION, GREY GREASE FROM BEARINGS.Sep 10, 2001 · N577AL · Bell 407 · Tail Rotor Drive ShaftSDR CA010913001Trim Tab · debonded(CAN) DURING SCHEDULED AIRFRAME PERIODIC INSP TRIM TAB ON PARTICULAR MAIN ROTOR BLADE FOUND TO HAVE SEVERE DEBONDING WHICH INITIALLY SHOWED UP AS CRACKS IN FILLER MATERIAL AROUND TRIM TAB EDGES. CLOSER INSP REVEALED SEVERE DEBONDING & COMPROMISE OF TRIM TAB ATSep 4, 2001 · Bell 407 · Main Rotor BladesSDR R7MA33660Gps · inoperativeUNIT INOPERATIVE. SKIPS PAGE 3. UPDATE WITH MOST RECENT SOFTWARE PATCHES. REPLACED WITH NEW UNIT CORRECTED PROBLEM.Aug 27, 2001 · N407SJ · Bell 407 · Global Positioning SystemSDR R7MA33662Gyro · intermittentUNIT OPERATES INTERMITTENTLY. REPLACED WITH NEW UNIT CORRECTED PROBLEM.Aug 15, 2001 · N407SJ · Bell 407 · Attitude Gyro and Indicating SystemSDR R7MA36679Valve · damagedTHREADS NOT TREATED WITH LOCK-TITE PRIOR TO RE INSTALLATION INTO THE OUTER COMBUSTION CASE, WHICH RESULTED IN THREAD DAMAGE TO THE CASE ITSELF. THE REMOVED VALVE WAS LOST IN SHIPPING. REPLACED WITH NEW UNIT CORRECTED PROBLEM.Aug 15, 2001 · N407SJ · Bell 407 · Turbine Engine Combustion SectionSDR R7MA33684Combust Chamber · damagedBURNER DRAW VALVE WAS NOT COATED WITH ANTI-SEIZE FROM THE FACTORY. DURING REMOVAL OF THE VALVE, THREAD DAMAGE OCCURRED. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Aug 15, 2001 · N407SJ · Bell 407 · Turbine Engine Combustion SectionSDR R7MA33681Bleed Valve · leakingLEAKING AIR BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Aug 15, 2001 · N407SJ · Bell 407 · Compressor Bleed ValveSDR 2001F00574Turbine Wheel · corrodedTURBINE RECEIVED FROM FIELD FOR HOWLING NOISE. REMOVED COMBUSTION SECTION AND FOUND SULFADATION ON 1ST STAGE WHEEL. THIS TURBINE HAD A ROLLS ROYCE COMBUSTION LINER. WHEEL HAS MISSING AND BROKEN BLADES DUE TO SULFADATION. (M)Aug 10, 2001 · N687AL · Bell 407 · Turbine SectionSDR 2001F00578Blade · missingTURBINE RECEIVED FROM FIELD FOR HOWLING NOISE. REMOVED COMBUSTION SECTION AND FOUND SULFADATION ON 1ST STAGE WHEEL. WHEEL HAS MISSING AND BROKEN BLADES DUE TO SULPHADATION. (M)Aug 10, 2001 · N687AL · Bell 407 · Turbine SectionSDR CA010726027Bearing · noisy(CAN) AFTER NORMAL UNEVENTFUL FLT, PILOT SHUTDOWN A/C&NOTICED NOISE COMING FROM TAIL ROTOR DRIVE TRAINN DURING COAST DOWN. SUBSEQUENT INSP REVEALED THATT HE GREASE EMANATING FROM AFT FAN SHAFT BEARING BLACK WITH METALLICPARTICLES, BEARING ROUGH WHEN ROTATED USJul 26, 2001 · Bell 407 · Tail Rotor Drive ShaftSDR R7MR34249Blower · overheatedBLOWER ASSEMBLY, OVER HEATS CAUSING CIRCUIT BREAKER TO POP. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jul 26, 2001 · N911LN · Bell 407 · Air Distribution FanSDR CA010726028Bearing · disintegrated(CAN) SHORTLY AFTER TAKEOFF, ABOUT 400 FT ABOVE GROUND, A/C SOUND & VIBRATION LEVELS SUDDENLY CHANGED FROM NORMAL TO HEAVY VIBRATION THROUGHOUT WHOLE A/C WITH OSCILLATING, DRONING NOSIE. AS WELL, PILOT NOTICED PULSING FEEDBACK SE NSATION FROM ANTITORQUE PEDALSJul 24, 2001 · Bell 407 · Tail Rotor Drive ShaftSDR B1HR719229Yoke · out of toleranceDURING REPAIR OF TAIL ROTOR YOKE, BEARING BORES WERE FOUND TO BE OUT OF ACCEPTABLE LIMITS. YOKE WAS REMOVED AND REPLACED.Jul 17, 2001 · N407AM · Bell 407 · Tail Rotor HeadSDR R7MA37722Fan · wornWORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jul 5, 2001 · N407SJ · Bell 407 · Tail Rotor Drive ShaftSDR R7MA33725Bearing · wornWORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jul 5, 2001 · N407SJ · Bell 407 · Tail Rotor Drive ShaftSDR HEEA073534Filter Housing · malfunctionedOIL FILTER BOWL BYPASS BUTTON POPS CONTINUOUSLY. REPLACED WITH SERVICEABLE PART.Jun 20, 2001 · N407PH · Bell 407 · Turbine Engine Oil SystemSDR HEEA073537Hmu · noisyLOUD HUMMING NOISE IN ENGINE COMPARTMENT WITH BOOST PUMPS ON. REPLACED WITH SERVICEABLE PART.Jun 20, 2001 · N723PH · Bell 407 · Fuel Controlling SystemSDR HEEA073727Igniter Box · intermittentWORKS INTERMITTENTLY. AIRCRAFT WOULD NOT LIGHT OFF. TO BE RETURNED TO VENDOR.Jun 20, 2001 · N4999 · Bell 407 · ExciterSDR HEEA073751Igniter · erodedELECTRODE ERODED CAUSING DELAYED LIGHT OFF. SCRAPPED AND REPLACED WITH SERVICEABLE PART.Jun 20, 2001 · N496PH · Bell 407 · Spark Plug/Igniter
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