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 ALGA106938Wire Harness · chafedCHAFING AT AREAS WHERE CABLE COMES THROUGH TRANSFER TUBE. ADDED CHAFING PROTECTION TO CABLE ASSY OR ADELING IN ANOTHER MANNER.Nov 19, 2005 · N497AL · Bell 407 · Fuel System WiringSDR ALG2005F00111Connector · dirtyIN FLIGHT, TRANSMISSION PRESSURE INDICATOR OSCILLATING BETWEEN 0-120 PSI. CLEANED CONNECTOR PLUG ON TRANSMISSION TRANSMITTER. GROUND OPERATIONAL CHECK GOOD. (K)Nov 18, 2005 · N457AL · Bell 407 · Main Rotor Drive System WiringSDR YTRR107130Hmu · inoperativeRESTART FAULT LIGHT ILLUMINATED DURING FLIGHT. UPON LANDING AND SHUT-DOWN, FADEC FAULT LIGHT ALSO ILLUMINATED. REPLACED HMU.Nov 15, 2005 · N309RL · Bell 407 · Fuel Controlling SystemSDR ALG2005F00113Window · separatedON APPROACH TO LANDING, RT PASSENGER SLIDING WINDOW SEPARATED FROM THE AIRCRAFT. SECOND OCCURRENCE WITH SAME AC WITHIN A WEEK. REPLACED DOOR WITH SERVICEABLE DOOR AND WINDOW. (K)Nov 15, 2005 · N537AL · Bell 407 · Passenger Compartment WindowsSDR ALG2005F00118Indicator · malfunctionedIN FLIGHT TRANSMISSION PRESSURE DROPPED TO ZERO, RETURNED TO NORMAL AND BACK TO ZERO IN A 15 MINUTE FLIGHT. INSPECTION BY MAINT REVEALED THE NR 8 TAIL ROTOR DRIVE SHAFT HAD FAILED. A WO WAS OPENED FOR REPAIR OF THIS AIRCRAFT. REMOVED AND REPLACED TRANSMISSINov 13, 2005 · N579AL · Cirrus SR22 · Rotor Drive Indicating SystemSDR ALGA106759Pitch Link · ratchetingRATCHETY AND ROUGH / REPLACED WITH NEW BY FIELD MAINTENANCE.Nov 3, 2005 · N557AL · Bell 407 · Main Rotor HeadSDR ALGA106760Pitch Link · roughRATCHETY AND ROUGH / REPLACED WITH NEW BY FIELD MAINTENANCE.Nov 3, 2005 · N557AL · Bell 407 · Main Rotor HeadSDR 2005FA0001504Skin · debondedLESS THAN 10 HOURS FLIGHT TIME AFTER REPAIR FOR LEADING EEDGE DISBONDING THE BONDING FAILED AND TAIL ROTOR WASH DISPLACED THE LEADING EDGE. (K)Nov 2, 2005 · N113TV · Bell 407 · Rotorcraft Tail BoomSDR YTRR106612Universal Joint · wornUNIVERSAL BEARING ASSEMBLY FOUND WORN. REPLACED PART.Oct 30, 2005 · N595RL · Bell 407 · Main Rotor ControlSDR ALG2005F00085Indicator · failedIN FLIGHT, TORQUE INDICATOR FAILED. RETURNED TO DEPARTURE AND NOTIFIED MAINTENANCE. REMOVED AND REPLACED TORQUE INDICATOR WITH SERVICEABLE UNIT IAW MM. (K)Oct 25, 2005 · N597AL · Bell 407 · Engine BMEP/Torque IndicatingSDR YTRR106613Universal Joint · wornUNIVERSAL BEARING ASSEMBLY FOUND WORN. REPLACED BEARING ASSY.Oct 12, 2005 · N407HX · Bell 407 · Main Rotor ControlSDR YTRR106615Universal Joint · wornUNIVERSAL BEARING ASSEMBLY FOUND WORN. REPLACED BEARING ASSY.Oct 12, 2005 · N407HX · Bell 407 · Main Rotor ControlSDR ALG2005F00088Hmu · failedDURING LEVEL FLIGHT RESTART FAULT LIGHT ILLUMINATED. RETURNED TO DEPARTURE AND NOTIFIED MAINTENANCE. REMOVED AND REPLACED HMU WITH SERVICEABLE UNIT IAW MM. OPS CHECK GOOD. (K)Oct 11, 2005 · N617AL · Bell 407 · Fuel Control/Turbine EnginesSDR ALG2005F00078Hmu · failedDURING HOVER, RESTART LIGHT CAME ON, FOLLOWED BY THE DEGRADE LIGHT. REMOVED AND REPLACED HMU WITH SERVICEABLE UNIT. IAW MM. (K)Oct 6, 2005 · N796RV · Bell 407 · Fuel Control/Turbine EnginesSDR YTRR106618Universal Joint · wornUNIVERSAL BEARING ASSEMBLY FOUND WORN. REPLACED BEARING ASSY.Sep 18, 2005 · N163RL · Bell 407 · Main Rotor ControlSDR ALGA106077Pitch Link · bindingEXCESSIVE BINDING AND EXCESSIVE AXIAL PLAY. REPLACED WITH NEW BY FIELD MAINTENANCE.Sep 11, 2005 · N409AL · Bell 407 · Main Rotor HeadSDR CA050913007Bearing · sheared(CAN) BEARING SHEARED FROM THE CENTER SUPPORT.Sep 9, 2005 · Bell 407 · Main Rotor HeadSDR CA051004007Blade · damaged(CAN) AIRCRAFT LIFTED OFF STAGING AREA WITH SLING LOAD. LOUD NOISE HEARD 2 MINUTES INTO FLIGHT. NO CAUTION LIGHTS OR OTHER INDICATION OF PROBLEM OTHER THAN LOUD AND HIGH-PITCHED NOISE. AIRCRAFT TURNED BACK AND MADE A NORMAL LANDING AND SHUT-DOWN. TURBINE WAS RSep 8, 2005 · Bell 407 · Turbine SectionSDR YTRR105929Bearing · wornON ROUTINE INSPECTION FOUND PITCH CHANGE LINK BEARING WORN BEYOND LIMITS IN BOTH THE AXIAL AND RADIAL DIRECTIONS.Sep 6, 2005 · N595RL · Bell 407 · Main Rotor Drive SystemSDR ALG2005F00061Spring · failedAIRCRAFT DEVELOPED A VERTICAL VIBRATION IN FLIGHT. NOTIFIED MAINTENANCE. FRAHM DAMPER SPRING HAD FAILED. REMOVED AND INSTALLED FOUR NEW FRAHM DAMPER SPRINGS IAW MM. (K)Aug 25, 2005 · N537AL · Bell 407 · Main Rotor HeadSDR ALG2005F00065Indicator · failedON TAKEOFF, NG INDICATOR PEGGED OUT. RETURNED TO BASE AND NOTIFIED MAINTENANCE. REMOVED AND REPLACED INDICATOR WITH SERVICEABLE UNIT. FUNCTIONAL CHECK OK. IAW MM. (K)Aug 24, 2005 · N577AL · Bell 407 · Engine RPM Indicating SystemSDR ALG2005F00067Engine · fodON TAKE OFF, HIGH PITCH WHINE WAS NOTED. NOTIFIED MAINTENANCE. INSPECTED ENGINE AND FOUND COMPRESSOR FOD DAMAGE. REMOVED AND REPLACED ENGINE ASSY. GROUND RUN, VIBRATION CHECK, AND LEAK CHECK ALL GOOD. WORK IAW MM. (K)Aug 13, 2005 · N697AL · Bell 407 · Turbine Engine Compressor SectionSDR ALG2005F00069Indicator · failedON CLIMB OUT FROM BASE, TORQUE GUAGE DROPPED TO 2 PERCENT. MAINTENANCE NOTIFIED. REMOVED AND REPLACED ENGINE TORQUE INDICATOR. C/W LEAK CHECK AND GROUND RUN, NOT DEFECTS NOTED. ALL WORK IAW MM. (K)Aug 13, 2005 · N617AL · Bell 407 · Engine BMEP/Torque IndicatingSDR ALG2005F00064Transmitter · failedON CLIMB OUT FROM BASE, TORQUE GAUGE GRADUALLY DECREASED TO ZERO. MAINTENANCE NOTIFIED. REMOVED TORQUE TRANSMITTER SN 57586518, AND INSTALLED SN 57292141. LEAK AND OPS CHECK GOOD. WORK IAW MM. (K)Aug 12, 2005 · N617AL · Bell 407 · Engine BMEP/Torque IndicatingSDR ALG2005F00058Bleed Valve · failedDURING OPS FLIGHT CHECK, WHILE ACCELERATING, (CHECK INSTRUMENT LIGHT) ILLUMINATED, THE PILOT IMMEDIATELY REDUCED POWER AND THE COMPRESSOR STALLED. PILOT RETURNED TO BASE AND NOTIFIED MAINTENANCE. THE MECHANIC REMOVED AND REPLACED THE BLEED VALVE AND THE AC WAug 4, 2005 · N547AL · Bell 407 · Compressor Bleed ValveSDR YTRR104994Bearing · out of limitsM/R PC LINK BEARING AXIAL AND RADIAL MOVEMENT BEYOND ALLOWABLE LIMITSJul 28, 2005 · N594RL · Bell 407 · Main Rotor HeadSDR YTRR104995Bearing · out of limitsM/R PC LINK BEARING AXIAL AND RADIAL MOVEMENT BEYOND LIMITSJul 28, 2005 · N594RL · Bell 407 · Main Rotor HeadSDR ALGA105176Pitch Link · ratchetingRATCHETY AND ROUGH / REPLACER WITH NEW BY FIELD MAINTENANCE.Jul 25, 2005 · N477AL · Bell 407 · Main Rotor HeadSDR YTRR104954Governor · unserviceableCANNOT ADJUST RPM. REPLACED GOVERNOR.Jul 21, 2005 · N209RA · Bell 206B3 · Turbine GovernorSDR ALG2005F00048Transmission · making metalIN FLIGHT TRANSMISSION, CHIP LIGHT ILLUMINATED, UPON LANDING THE MECHANIC CLEANED THE TRANSMISSION CHIP PLUGS IAW MM AND DURING THE GROUND RUN AND LEAK CHECK TRANSMISSION CHIP LIGHT ILLUMINATED ONCE AGAIN. THE MECHANIC REMOVED AND REPLACED THE TRANSMISSION. Jul 20, 2005 · N796RV · Bell 407 · Rotor Drive Indicating SystemSDR ALG2005F00047Indicator · odorIN CRUISE FLIGHT, 4 MINUTES FROM LANDING, THE TORQUE INDICATOR WENT BLANK, 1 MINUTE LATER THE PILOT COULD SMELL PLASTIC BURNING IN THE COCKPIT. THE PILOT LANDED AND NOTIFIED MAINTENANCE. MECHANIC REMOVED AND REPLACED THE TORQUE GAUGE AND AC WAS RETURNED TO SJul 18, 2005 · N436AL · Bell 407 · Engine BMEP/Torque IndicatingSDR 2005FA0001098Bevel Gear · brokenHELICOPTER RECEIVED 2 TRANSMISSION CHIP CAUTION LIGHTS IN 2.9 HOURS. MAIN INPUT GUILL WAS REMOVED FOR INSPECTION OF THE BEVEL GEAR. THE BEVEL GEAR INSPECTION REVEALED 1 MISSING GEAR TOOTH AND AN ADJACENT TOOTH CRACKED. TRANSMISSION SENT TO MFG FOR EVALUATIOJul 14, 2005 · N701WP · Bell 407 · Main Rotor GearboxSDR IIF2005F00000Cap · brokenAIRCRAFT IN FOR INSPECTION, MECHANICAL INSPECTING AREA OF ROTOR BRAKE NOTICED BLACK LINE ACROSS EAR WHERE BOLT GOES THROUGH HOLE. REMOVED BOLT AND EAR FELL OFF. POSSIBLE CAUSE, VIBRATION. (K)Jun 17, 2005 · N407PR · Bell 407 · Engine/Transmission CouplingSDR 2005FA0000923Monitor · broken3 MONITORS WERE INSTALLED DURING THE COMPLETION OF THE HELICOPTER ON AN FORM THAT WAS FIELD APPROVED. DURNG LEVEL FLIGHT, AT 6500 FEET, THE OUTER PANE OF GLASS SHATTERED FROM THE FRONT OF THE MONITOR WITH VARIOUS SIZE PIECES HITTING THE CREW. MFG SENT 2 ENGIJun 14, 2005 · N139PD · Bell 407 · Indicating/Recording SystemSDR ALG2005F00033Chip Detector · contaminatedDURING TAKE OFF, TRANSMISSION CHIP LIGHT CAME ON DURING TAKEOFF, RETURNED TO DEPARTURE. MAINTENANCE REMOVED ALL CHIP PLUGS, FOUND NORMAL WEAR LINT LIKE PARTICLE ON LOWER PLUG. CLEANED PLUGS AND A 30 MINUTE PENALTY RUN WAS PERFORMED ALL CHECKS WERE GOOD. WORMay 27, 2005 · N527AL · Bell 407 · Tail Rotor GearboxSDR 2005FA0000772Fitting · crackedUPPER RT TAILBOOM ATTACH FITTING CRACKED. THIS IS THE SAME AREA COVERED IN AD AND SB, 25 HOUR INSPECTION. (K)May 5, 2005 · N451DL · Doug 600N · Rotorcraft Tail BoomSDR ALG2005F00029Transducer · fluctuatesON TAKE OFF THE TORQUE GAUGE FLUCTUATED 60 PERCENT TO 70 PERCENT, RETURNED TO BASE AND REPORTED THE MALFUNCTION TO MAINTENANCE. MAINTENANCE CHANGED THE TORQUE PRESSURE TRANSDUCER AND OPS CHECK WAS GOOD, WORK DONE IAW MM. (K)Apr 29, 2005 · N405AL · Bell 407 · Engine BMEP/Torque IndicatingSDR ALGA100723Pitch Link · bindingBINDING, ROUGH, AXIAL PLAY BEYOND MAX. REPLACED WITH NEW BY FIELD MAINTENANCE.Apr 28, 2005 · N547AL · Bell 407 · Main Rotor HeadSDR CA050429001Bowl · leakingTHE CEFA OIL FILTER BYPASS INDICATOR POPPED OUT. INVESTIGATION REVEALED THE IMPENDING BYPASS INDICATOR ON THE CEFA OIL FILTER BOWL FELL APART. A RETAINING CLIP BROKE AND PARTS OF IT WERE FOUND IN THE OIL SYSTEM. SPRING, PRESSURE PLATES AND POPPET WERE ALSO Apr 28, 2005 · Bell 407 · Turbine Engine Oil SystemSDR ALGA100722Pitch Link · bindingBINDING, ROUGH AXIAL PLAY BEYOND MAX. REPLACED WITH NEW BY FIELD MAINTENANCE.Apr 20, 2005 · N937AL · Bell 407 · Main Rotor HeadSDR HEEA107346Engine · noisyUPON DESCENT, CREW NOTICED UNUSUAL NOISES COMING FROM THE ENGINE COMPARTMENT. ENTERED A POWER-ON AUTO ROTATIONAL PROFILE AND LANDED IN A NEARBY FIELD. MAINTENANCE REPORTS, ENGINE HAS A NOISE AT FULL THROTTLE, FLAT PITCH, THAT WILL INCREASE IN INTENSITY WHEN Apr 19, 2005 · N510PH · Bell 407 · Engine (Turbine/Turboprop)SDR ALG2005F00025Hose · leakingAT CRUISE FLIGHT AT 2750 FT, HEADING NORTH NORTHEAST, HYDRAULIC CAUTION LIGHT ILLUMINATED AND CONTROLS BECAME STIFF. MAINTENANCE FOUND THE CASE DRAIN LINE FLEX HOSE AT HYDRAULIC PUMP WAS TIGHT BUT LEAKING OIL, REMOVED AND REPLACED HYDRAULIC PUMP FOR INTERAL LApr 16, 2005 · N587AL · Bell 407 · Hydraulic System, MainSDR ALG2005F00018Transmission · making metalON TAKEOFF, TRANSMISSION CHIP LIGHT ILLUMINATED, PILOT RETURNED TO THE PLATFORM. SHUTDOWN AND NOTIFIED MAINTENANCE. REMOVED UPPER CHIP PLUG AND FOUND 3 SMALL SLIVERS. CLEANED THE PLUG, REINSTALLED CHIP PLUG AND PERFORMED A 30 MINUTE PENALTY RUN AND LEAK CHEMar 30, 2005 · N403AL · Bell 407 · Main Rotor GearboxSDR CA050328002Combustion Liner · cracked(CAN) COMBUSTION LINER FOUND CRACKED WHEN REMOVED DURING UNRELATED SCHEDULED MAINTENANCE. NO CRACKS ALLOWED IN SUBJECT AREA. THIS IS AN ON GOING PROBLEM WITH THIS PART.Mar 23, 2005 · Bell 407 · Turbine Engine Combustion SectionSDR CA050406007Blade · cracked(CAN) WHILE TROUBLESHOOTING MAIN ROTOR SYSTEM FOR CAUSE OF DIFFICULTY WITH M/R TRACK AND BALANCE A HAIRLINE CRACK WAS DISCOVERED IN THE DISCREPANT BLADE LEADING EDGE ABRASION STRIP APPROXIMATELY 77 INCHES FROM THE BLADE TIP. THE BLADE AS PLACED ON A WORK STANMar 17, 2005 · Bell 407 · Main Rotor BladesSDR CA050404006Blade · damaged(CAN) CRACK IN THE LEADING EDGE EROSION STRIP WAS DISCOVERED WHILE TRYING TO WORK THE MAIN ROTOR WITH THE RADS. ON INITIAL INSPECTION THE CRACK APPEARED TO BE A MASKED EDGE FROM THE NICKEL ABRASION COATING BUT AFTER THE BLADE WAS FLEXED, IT OPENED UP TO REVEAMar 17, 2005 · Bell 407 · Main Rotor BladesSDR 2005FA0000395Check Valve · misinstalledCOMPONENT INSTALLED ON THE SIDE OF ENGINE. WHEN IT WAS INSPECTED FOUND NUT DISLODGED FROM STUD COVER OF CHECK VALVE.Mar 16, 2005 · N18SP · Bell 407 · Engine Fuel DistributionSDR ALG2005F00020Pressure Switch · inoperativeFOLLOWING LIFT OFF, AND AT HOVER TO FLYWAY THE TRANSMISSION PRESSURE LIGHT CAME ON AND STAYED ON. RETURNED TO AIRCRAFT TO PAD AND CALLED MAINTENANCE. MAINTENANCE REPLACED THE TRANSMISSION OIL PRESSURE SWITCH AND COMPLIED WITH GROUND RUN, OPS AND LEAK CHECK, Mar 10, 2005 · N436AL · Bell 407 · Rotor Drive Indicating SystemSDR YTRR099530Fuel Filter · failedFUEL FILTER HEAD ASS'Y WAS INSTALLED ON THIS AIRCRAFT NEW FROM BHT. IT FAILED AFTER 659.6 HRS TIME IN SERVICE.Mar 7, 2005 · N595RL · Bell 407 · Aircraft Fuel Filter/StrainerSDR CA050222003Combustion Liner · cracked(CAN) PART CRACKED IN DOUBLE LIP AREA. NO CRACKS ALLOWED IN THIS LOCATION. MAJORITY OF COMBUSTION LINERS REMOVED ARE FOUND CRACKED IN THIS AREA.Feb 18, 2005 · Bell 407 · Turbine Engine Combustion Section
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