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 CA980818015Governor · failed(CAN) ROTOR RPM VARIES BETWEEN 95 TO 105 PERCENT. EXCESSIVE, SLOW OR NO RECOVERY UNDER DIFFERENT FLIGHT CONDITIONS.Jul 3, 1998 · Bell 206B · Turbine GovernorSDR 99ZZZX233Bearing · failedFORCED LANDING AT BRIGANTINE BAY, NJ. NR 1 BEARING FAILED. NO CHIP LIGHT. COMPRESSOR ROTOR DAMAGED. PARTS OF BEARING CAGE WERE LODGED IN OIL PORT. THIS MAY HAVE STOPPED OIL SUPPLY. NO SIGN OF OIL IN BEARING AREA OR ON COMPRESSOR ROTOR. NO BALL BEARINGS Jun 26, 1998 · N3298G · Bell 206B · Turbine Engine Combustion SectionSDR CA980713004Shaft · sheared(CAN) AFTER TAKEOFF, THE N2 GAS PRODUCER INDICATOR WENT TO ZERO AND ENGINE OUT LIGHT AND WARNING HORN ACTIVATED. THE TOT AND N2 ENGINE INDICATOR AND ROTOR TACHOMETER INDICATOR APPEARED NORMAL. AIRCRAFT LANDED OK. FOUND TACHOMETER GENERATOR SHAFT SHEARED. RJun 24, 1998 · Bell 206B · Engine RPM Indicating SystemSDR CA980818020Gear · broken(CAN) PILOT REPORTED CHIP LIGHT. INSPECITON FOUND PIECE OF GEAR TOOTH FROM THE FUEL CONTROL UNIT DRIVE TRAIN FOUND ON LOWER CHIP DETECTOR PLUG.Jun 23, 1998 · Bell 206B · Turbine Engine Reduction GearSDR CA980629027Vane · cracked(CAN) THE FRONT FRAME SUPPORT STRUT WAS FOUND CRACKED THE FULL LENGTH OF THE TRAILING EDGE AT APPROXIMATELY 10 O'CLOCK POSITION. PART TC: 2,127.Jun 21, 1998 · Bell 206L · Turbine Engine Compressor SectionSDR 98ZZZX2592Governor · failedSLUGGISH TO RETURN TO POWER. GOV REMOVED FROM AIRCRAFT AND SENT FOR REPAIR EVALUATION.Jun 19, 1998 · N90322 · Bell 206B · Turbine GovernorSDR 98ZZZX3361Drive Body · crackedDURING OVERHAUL (2,500 HOUR), FOUND FUEL CONTROL WITH A CRACKED MAIN DRIVE BODY.Jun 16, 1998 · N90761 · Bolkms BO105C · Fuel Control/Reciprocating EnginesSDR CA980706019Top Case · broken(CAN) ON SCHEDULED INSPECTION, FOUND GEAR TOOTH BROKEN INSIDE OF TOP CASE. GEAR IS PART OF TOP CASE CASTING.Jun 15, 1998 · Bell 206B · Main Rotor GearboxSDR CA980707040Bearing · failed(CAN) MAIN TRANSMISSION CHIP DETECTOR. METAL FLAKES BEYOND LIMITS ON LONG MAGNETIC CHIP DETECTOR AND OIL MONITOR PLUG. SUSPECT BEARING FAILURE.Jun 11, 1998 · Bell 206B · Main Rotor GearboxSDR CA980707036Starter · failed(CAN) STARTER/GENERATOR OVERHEATING AND SMOKING ON SHUT DOWN. DRIVEN BY REVERSE CURRENT RELAY. LOAD METER, RCR AND CIRCUIT BREAKERS REPLACED.Jun 5, 1998 · Bell 206B · Starter-GeneratorSDR CA980707033Shaft · sheared(CAN) NR N2 INDICATION. N2 TACH GENERATOR SHAFT SHEARED.Jun 1, 1998 · Bell 206B · Engine RPM Indicating SystemSDR CA980521001Drive Shaft · failed(CAN) ON CLIMBOUT AT LOW SPEED, SUDDEN UNCONTROLLABLE YAW TO THE RIGHT. AFTER SEVERAL 360 DEGREE TURNS, AIRCRAFT SETTLED INTO TREES. NR 2 SECTION OF T/R DRIVESHAFT BONDED COUPLING FAILED. CTSB INVESTIGATING.May 21, 1998 · Bell 206B · Tail Rotor Drive ShaftSDR CA980707034Linear Actuator · failed(CAN) INTERMITTENT OPERATION OF ACTUATOR. WOULD NOT BEEP DOWN. TWO TERMINAL BASES LOOSE. MOTOR VERY ROUGH RUNNING.May 19, 1998 · Bell 206B · Main Rotor ControlSDR 98ZZZX1981Filter · contaminatedDISCOVERED AT CLEAN AND FLOW CHECK. ITEM 1700-2000 TBO. CONTAMINATION OF FUEL NOZZLE FILTER.May 12, 1998 · N90215 · Bell 206B · Engine Fuel DistributionSDR CA980521008Tubing · melted(CAN) AIR SPEED INDICATOR SHOWING ONLY 20 KNOTS AT CRUISE. PITOT HEAD TUBING HAD BEEN INSTALLED TOO CLOSE TO LANDING LIGHT AND MELTED CAUSING LEAK.May 12, 1998 · Bell 206B · Pitot/Static SystemSDR 98ZZZX1936Governor · failedROTOR SPEED NR DROOPING TO 95 PERCENT AND WOULD NOT RECOVER. GOVERNOR WAS REPLACED WITH SERVICEABLE UNIT AND DROOP DID NOT RECUR.May 1, 1998 · N21460 · Bell 206B · Turbine GovernorSDR CA980602046Bolt · mismanufactured(CAN) ATTEMPT TO INSTALL BOLT THROUGH SWASHPLATE DRIVE LINK LEVER ASSY FAILED DUE TO NEW BOLT BEING OVERSIZE WITH CADIUM PLATING REMOVED. BOLT ALSO EXHIBITS PITTING ON SHANK AND SEEMS TO BE MADE OF INFERIOR MATERIAL.Apr 28, 1998 · Bell 206B · Main Rotor Mast/SwashplateSDR CA980922022Nut · cracked(CAN) PITCH CHANGE LINK ADJUSTER LOCKNUTS CRACKED ON MAGNETIC PARTICLE INSPECTION. SUBMITTER STATED THE VISUAL INSPECTION CALLED FOR IS NOT ADEQUATE FOR THE DEFECT FOUND HERE.Apr 16, 1998 · Bell 206B · Main Rotor HeadSDR CA981006027Nut · cracked(CAN) PITCH CHANGE LINK ADJUSTER LOCKNUT CRACKED ON MPI.Apr 16, 1998 · Bell 206B · Main Rotor ControlSDR CA980421007Fcu · failed(CAN) HELICOPTER IN HOVER, ENGINE DECELERATED TO IDLE. THROTTLE CONTROL IN FULL POSITION. PILOT AUTOROTATED TO RAMP. THROTTLE ROLLED BACK TO IDLE AND THEN BACK TO FULL AND ENGINE RESPONDED NORMALLY. FUEL AND AIR OF FCU AND GOVERNOR WERE LEAK CHECKED OK. FCApr 13, 1998 · Bell 206B · Fuel Controlling SystemSDR 98ZZZX1788Nozzle · crackedCRACKED DIAPHRAGM. REMOVED AND REPLACED.Apr 1, 1998 · N911LF · Bolkms BO105S · Turbine SectionSDR 98ZZZX1789Nozzle · failedNR 1 BLADE PATH BREAKING OUT NOZZLE NR 2. REMOVED AND REPLACED.Apr 1, 1998 · N911LF · Bolkms BO105S · Turbine SectionSDR 98ZZZX2338Turbine Suport · crackedFOUND CIRCUMFERENTIAL CRACKS IN THE POWER TURBINE SUPPORT RADIUS AREA. REPLACED TURBINE.Mar 30, 1998 · N492HL · Bolkms BO105CBS · Turbine SectionSDR CA980602052Connector · cracked(CAN) HYDRAULIC CONNECTOR BODY CRACKED POSSIBLY FROM OVERTORQUE.Mar 28, 1998 · Bell 206B · Hydraulic System, MainSDR CA971014007Gearbox · separated(CAN) AFTER REMOVING CASEY HEATER SHROUD, THE 4.3125 INCH NUTS WERE REMOVED FROM TURBINE TO GEARBOX, LEAVING TOP .3750 INCH NUT REMAINING. AFTER TAKING WEIGHT OF TURBINE, NOTED HOW LOOSE IT WAS. TURBINE WAS REMOVED BY HAND. THE SHROUD WITH NUT WAS STILL IN TMar 24, 1998 · Bell 206L · Turbine Engine Reduction GearSDR CA970513023Shaft · cracked(CAN) IN-FLIGHT FAILURE OF OIL COOLER CONNECTING SHAFT.Mar 19, 1998 · Enstrm ENSTROM480 · Turbine Engine Oil SystemSDR CA970625001Gearshaft · cracked(CAN) SEVERAL CRACKS ORIGINATING FROM THE INNER SHOULDER AREA WORN TO APPROXIMATELY HALF THE THICKNESS FROM CONTACT WITH TORQUEMETER PISTON THRUST BEARING. THESE CRACKS RUN RADIALLY, THEN INTO THE THIRTY TOOTH GEAR, THEN AXIALLY FULL LENGTH OF THE GEAR. THE Mar 19, 1998 · Turbine Engine Accessory DriveSDR 98ZZZX1272Case Half · erodedA SLIGHT RUB WAS HEARD IN THE COMPRESSOR WHEN THE N1 WAS ROTATED. UPON CASE HALF REMOVAL FOR INSPECTION, SEVERE VANE EROSION WAS FOUND. THE CHORD OF ONE VANE WAS SO THIN AS TO CAUSE THE VANE TO BEND AND RUB ON THE COMPRESSOR ROTOR. SUBMITTER SUSPECTS CASE HMar 9, 1998 · N13WD · Hughes 369HS · Fuel Controlling SystemSDR CA980325002Cyclic Control · cracked(CAN) CRACK 1/16TH TO 1/8TH OF AN INCH FOUND ON UPPER RELIEF SLOT OF CYCLIC.Mar 6, 1998 · Bell 206B · Control Column SectionSDR CA980406032Longeron · cracked(CAN) ON INSPECTION, RIGHT LONGERON CRACKED.Mar 4, 1998 · Bell 206B · Fuselage Main, Longeron/StringerSDR CA980406033Tunnel · cracked(CAN) AFT CROSSTUBE TUNNELS P/N 206-031-301-121 AND P/N 206-031-302-269 CRACKED IN NUMEROUS LOCATIONS.Mar 4, 1998 · Bell 206B · Fuselage Miscellaneous StructureSDR CA980406034Doubler · cracked(CAN) ON REMOVAL OF FUEL CELL, FOUND BOOST PUMP ATTACH DOUBLER AND DRAIN ATTACH DOUBLER CRACKED AND HAD ENLARGED HOLES.Mar 4, 1998 · Bell 206B · Fuselage Main, Plate/SkinSDR CA980406035Panel · cracked(CAN) CENTER CONSOLE LEFT HAND PANEL CRACKED ON FORWARD SIDE AND DELAMINATED ON AFT SIDE ADJACENT TO BLEED AIR HEATER DISTRIBUTION VALVES.Mar 4, 1998 · Bell 206B · Fuselage Main, Plate/SkinSDR CA980311004Sensor · cracked(CAN) DURING 1200 HOUR INSPECTION AN OIL MONITOR WAS FOUND CRACKED 360 DEG. OF RADIUS BETWEEN BOLT HEAD AND SHAFT.Mar 3, 1998 · Bell 206B · Main Rotor GearboxSDR CA980313009Eductor · cracked(CAN) EXHAUST EDUCTOR CRACKED IN SEVERAL PLACES BOTH ON FORWARD AND AFT EDGES AROUND DOUBLERS.Feb 24, 1998 · Camair 480 · Engine Collector/Tailpipe/NozzleSDR CA980313008Spindle · out of adj(CAN) TAIL ROTOR HEAD ASSEMBLY FOUND TO BE INSTALLED APPROX. 10 DEGREES OUT OF ALIGNMENT IN A COUNTER CLOCKWISE DIRECTION. LACK OF MASTER SPLINE MAKES THIS MISTAKE EASILY MADE.Feb 24, 1998 · Enstrm ENSTROM480 · Tail Rotor HeadSDR CA980225005Bearing · split(CAN) INNER RACE SPLIT ON MAIN ROTOR TRUNNION BEARING.Feb 12, 1998 · Bell 206B · Main Rotor HeadSDR CA980406031Pump · leaking(CAN) ENGINE DRIVEN FUEL PUMP DRAIN SEAL LEAKING BEYOND LIMIT. PUMP ALSO MAKING LOUD SQUEALS DURING START-UP.Feb 11, 1998 · Bell 206B · Engine Fuel PumpSDR HEEA0013022Igniter Box · failedIGNITER BOX INTERMITTENT.Feb 11, 1998 · N2285B · Bell 206B3 · ExciterSDR CA980220001Blade · corroded(CAN) MAIN ROTOR BLADES REMOVED FROM HUB FOR MAINTENANCE. BLADE BORES WERE FOUND CORRODED BEYOND LIMITS. THIS 4TH TIME AFTER BORE BUSHING CHANGES THE CORROSION HAS REAPPEARED.Feb 5, 1998 · Bell 206B · Main Rotor BladesSDR CA980317076Switch · failed(CAN) ''G'' SWITCH FAILED CAUSING SPONTANEOUS ACTIVATION OF UNIT.Feb 3, 1998 · Bell 206B · Emergency Locator BeaconSDR CA980317075Fcu · failed(CAN) ENGINE HAD HUNG START AT 25% NG. MAX LIGHT OFF TEMP AFTER FCU ADJUSTMENT OF ONE FULL TURN. FCU HAS 0.0 HOURS SINCE OVERHAUL.Jan 28, 1998 · Bell 206B · Fuel Control/Turbine EnginesSDR CA980317085Fcu · out of adj(CAN) FCU RECEIVED WITH PAPERWORK TO INDICATE THE MAXIMIUM FLOW WAS SET TO 235 PPH AS PER INSTRUCTIONS. THE MAXIMUM FUEL FLOW SCREW WAS APPROX 1/16 DOWN FROM MAX MARK. CLOSER TO MAX MARK THEN MIN.Jan 14, 1998 · Bell 206B · Fuel Control/Turbine EnginesSDR CA980317079Fcu · failed(CAN) ENGINE FLAMED OUT DURING START AT 55% NG AND AT 35-40% NG ON SUBSEQUENT ATTEMPT. FUEL CONTROL UNIT REPLACED.Jan 13, 1998 · Bell 206B · Fuel Control/Turbine EnginesSDR CA970421038Ring Grooves · worn(CAN) FRONT SEAL RING GROOVES WORN BEYOND LIMITS.Jan 7, 1998 · Bell 206B · Turbine Engine Compressor SectionSDR 98ZZZX323Governor · failedGOVERNOR SLOW TO RESPOND TO POWER CHANGES (HIGH AND LOW SIDE).Jan 6, 1998 · N9907K · Bell 206B · Turbine GovernorSDR CA980430001Blade · cracked(CAN) PILOT REPORTED MR VIBRATION. ENGINEER FOUND ONE CHORDWISE CRACK FROM THE BLADE SPAR TO THE TRAILING EDGE AT APPROX 90.5 INCHES FROM THE TIP.Jan 5, 1998 · Bell 206B · Main Rotor BladesSDR HEEA0012408Fuel Pump · wornFUEL PUMP WORN DRIVE SHAFT SPLINES AND GEARS.Dec 31, 1997 · N141BH · Bell 206L3 · Engine Fuel PumpSDR CA971231008Tube · cracked(CAN) AIR LINE FROM COMPRESSOR SCROLL TO GOVERNOR CRACKED AT FLARE AT SCROLL END. THIS CAUSED ENGINE TO GO TO IDLE.Dec 19, 1997 · Bell 206B · Fuel Controlling SystemSDR CA971231009Line · leaking(CAN) FUEL NOTED DRIPPING FROM THE ENGINE COMPARTMENT OVERBOARD DRAIN. FUEL LINE BETWEEN FUEL CONTROL AND GOVERNOR LEAKING.Dec 19, 1997 · Bell 206B · Fuel Controlling System
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