MBB BK 117 A-3

Service difficulty reports · 719

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 aircraft_model_key = 'BK117A3'
  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 HEEA0011643Indicator · out of toleranceENGINE RPM INDICATOR HIGH OUT OF TOLERANCE ABOVE 50 PERCENT INTERMITTENT OPERATION.Oct 22, 1997 · N911NC · Bolkms BK117A3 · Engine RPM Indicating SystemSDR 97ZZZX5056Indicator · defectiveBAD INPUTS TO YAW CSAS. NOTE: RED IMPACT INDICATOR. REMOVED AND REPLACED.Oct 19, 1997 · N911MZ · Bolkms BK117A3 · Attitude Gyro and Indicating SystemSDR 97ZZZX5055Indicator · failedCIRCUIT BREAKER TRIPS. INDICATOR HAS INTERNAL SHORT. REMOVED AND REPLACED.Oct 16, 1997 · N527MB · Bolkms BK117A3 · TireSDR 97ZZZX5080Bearing · mismanufacturedTOLERANCES TOO TIGHT, WOULD NOT FIT ON SHAFT CORRECTLY. REMOVED AND REPLACED.Oct 8, 1997 · Bolkms BK117A3 · Tail Rotor GearboxSDR 98ZZZX569Manifold · leaksSUBMITTER STATES EXCESSIVE FUEL MANIFOLD LEAKS OVER THE LAST 18 MONTHS. ALLIED SIGNAL IS IN THE PROCESS OF RELEASING AN ASB LIMITING THE LIFE OF THE FUEL MANIFOLD TUBES. OTHER OPERATORS SUBMITTER CONTACTED ARE HAVING THE SAME PROBLEMS. OMNIFLIGHT HAS GONE TOct 7, 1997 · N911MZ · Bolkms BK117A3 · Engine Fuel DistributionSDR 97ZZZX5054Starter/Gen · chafedREMOVED NR 2 STARTER/GENERATOR. FAN CHAFED HOLE IN SCREEN. REMOVED AND REPLACED.Oct 5, 1997 · N4493X · Bolkms BK117A3 · Starter-GeneratorSDR HEEA0011178Indicator · failedAIR SPEED NEEDLE DOES NOT RETURN TO ZERO ON INDICATOR.Oct 2, 1997 · N401PH · Bolkms BK117A3 · Airspeed/Mach IndicatorSDR 97ZZZX5075Toggle Switch · failedTOGGLE SWITCH UNIT INOPERATIVE. WILL NOT CLOSE WHEN POWER IS 'OFF'. UNIT IS STUCK IN 'ON' POSITION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 2, 1997 · N951AM · Bolkms BK117A3 · DC Generating SystemSDR 98ZZZX1432Bearing · damagedBEARING NR 2 OUTER RACE SECONDARY DAMAGE DUE TO NR 2 BEARING FAILURE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES: 9,931.0.Sep 30, 1997 · N117NY · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 98ZZZX1431Bearing · damagedBEAERING NR 3 SECONDARY DAMAGE DUE TO NR 2 BEARING FAILURE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES: 1,069.2.Sep 30, 1997 · N117NY · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX1430Bearing · damagedNR 1 BEARING SECONDARY DAMAGE DUE TO NR 2 BEARING FAILURE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES: 1,069.2.Sep 30, 1997 · N117NY · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 98ZZZX1429Bearing · failedNR 2 BEARING FAILURE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES: 2,448.5.Sep 30, 1997 · N117NY · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 98ZZZX570Manifold · leaksSUBMITTER STATES EXCESSIVE FUEL MANIFOLD LEAKS OVER THE LAST 18 MONTHS. ALLIED SIGNAL IS IN THE PROCESS OF RELEASING AN ASB LIMITING THE LIFE OF THE FUEL MANIFOLD TUBES. OTHER OPERATORS SUBMITTER CONTACTED ARE HAVING THE SAME PROBLEMS. OMNIFLIGHT HAS GONE TSep 13, 1997 · N911MZ · Bolkms BK117A3 · Engine Fuel DistributionSDR HEEA0011027Blade · defectiveBONDING BRAID BROKEN NEAR THE INBOARD END OF THE ABRASION STRIP.Sep 10, 1997 · N8765J · Bolkms BK117A3 · Main Rotor BladesSDR 97ZZZX4713Output Shaft · mismanufacturedOUTPUT SHAFT REJECTED NEW OUT-OF-BOX. SILVER PLATING ON INNER SHAFT SURFACE NOT PROPERLY APPLIED. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Aug 21, 1997 · Bolkms BK117A3 · Main Rotor GearboxSDR 97ZZZX4712Bevel Wheel · mismanufacutredTRANSMISSION BEVEL WHEEL REJECTED NEW OUT-OF-BOX. UNABLE TO GET ACCEPTABLE GEAR PATTERN. INSTALLED IN 2 DIFFERENT GEARBOXES WITHOUT SUCCESS (SAME RESULTS). THE CONTACT PATTERN IS ALWAYS OFF THE TOE. REPLACED WITH NEW UNIT, CORRECT PROBLEM.Aug 21, 1997 · Bolkms BK117A3 · Main Rotor GearboxSDR HEEA0010742Search Light · bentSEARCH LIGHT CANNON PLUG AND ATTACHED HOUSING BENT.Aug 19, 1997 · N8765J · Bolkms BK117A3 · Exterior LightingSDR 97ZZZX4097Rotor Assy · blade shiftROTOR ASSY FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT. FAILED Q-ROTOR INSPECTION. REPLACED WITH USED UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES, 8,508.8.Aug 13, 1997 · N117MA · Bolkms BK117A3 · Turbine SectionSDR 97ZZZX5066Switch · failedSWITCH UNIT OPERATES INTERMITTENTLY IN 'ON' POSITION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Aug 6, 1997 · N428MB · Bolkms BK117A3 · Engine CrankingSDR 98ZZZX1150Seal · leakingLEFT ENGINE NR 3 BEARING LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jul 28, 1997 · N158BK · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX1149Seal · leakingLEFT ENGINE NR 1 BEARING LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jul 28, 1997 · N158BK · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 98ZZZX106Rotor Assy · failedROTOR ASSY FAILED SB LT101-72-10-0153, Q-ROTOR = 12.36 GMIN2. EXCESSIVE IBPT BLADE SHIFT. REPLACED WITH USED UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES, 3,148.Jul 28, 1997 · N158BK · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX1151Seal · leakedLEFT ENGINE NR 2 BEARING SEAL, UPON INSTALLATION, UNIT LEAKED BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jul 24, 1997 · N424MB · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 97ZZZX5065Speed Pickup · failedSPEED PICKUP UNIT FAILED TO TEST UPON INSTALLATION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jul 10, 1997 · N424MB · Bolkms BK117A3 · Engine RPM Indicating SystemSDR HEEA0010360Indicator · reads highN1 READS HIGH AT 90% AND ABOVEJun 26, 1997 · N401PH · Bolkms BK117A3 · Engine RPM Indicating SystemSDR HEEA0010198Actuator · leakingT/R ACTUATOR LEAKING HYRAULIC FLUID.Jun 23, 1997 · N911NC · Bolkms BK117A3 · Tail Rotor Control SystemSDR HEEA0010178Indicator · intermittentMAST MOMENT INDICATOR INTERMITTENT IN FLIGHT.Jun 19, 1997 · N911NC · Bolkms BK117A3 · Main Rotor Indicating SystemSDR HEEA0010177Transmitter · intermittentTORQUE TRANSMITTER INTERMITTENT IN FLIGHT.Jun 19, 1997 · N911NC · Bolkms BK117A3 · Main Rotor Indicating SystemSDR 97ZZZX3591Computer · failedSPAS COMPUTER CAUTION LIGHT ILLUMINATES INTERMITTENTLY IN-FLIGHT. UNIT FAILED AFTER ONLY 178 HOURS. REMOVED AND REPLACED. (X)Jun 17, 1997 · N527MB · Bolkms BK117A3 · Autopilot ComputerSDR 97ZZZX4593Blade · crackedFAILED BLADE INSPECTION. EXCESSIVE SKINS CRACKS AND BULGING. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jun 15, 1997 · N420MB · Bolkms BK117A3 · Main Rotor BladesSDR 97ZZZX4592Blade · crackedFAILED BLADE INSPECTION. EXCESSIVE SKINS CRACKS AND BULGING. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jun 15, 1997 · N420MB · Bolkms BK117A3 · Main Rotor BladesSDR HEEA0010064Transducer · erraticENG TORQUE ERRATIC READINGS.Jun 6, 1997 · N401PH · Bolkms BK117A3 · Engine BMEP/Torque IndicatingSDR HEEA0010048Indicator · defectiveAFTER ONE HOUR OF USE, NEEDLE DROPS FROM NINETY PERCENT TO FIFTY PERCENT.Jun 5, 1997 · N911NC · Bolkms BK117A3 · Engine RPM Indicating SystemSDR 97ZZZX4098Bearing · wornBEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.May 31, 1997 · N117MV · Bolkms BK117A3 · Tail Rotor SystemSDR 97ZZZX3614Gyro · driftsDIRECTIONAL GYRO DRIFTS OFF HEADING. FAILED AFTER ONLY 4.5 HOURS OPERATION.May 14, 1997 · N4493X · Bolkms BK117A3 · Directional Gyro and Indicating SystemSDR HAIHEEA9597Blade · defectiveWEIGHT PACKAGE MOVIAL. S/N 1158 & 1174Apr 24, 1997 · N911NC · Bolkms BK117A3 · Main Rotor BladesSDR HAIHEEA9542Armature · brushes wornSTART/GEN BRUSHES WORN. SHORTED OUT. RECEIVED REWOUND FROM VENDOR. TIME SINCE REPAIR 258:15.Apr 23, 1997 · N911NC · Bolkms BK117A3 · Starter-GeneratorSDR HAIHEEA9539Battery · defectiveBATTERY NOT HOLDING CHARGE. FAILED CAPACITY CHECK 3 TIMES.Apr 23, 1997 · N8765J · Bolkms BK117A3 · Battery/Charger SystemSDR 97ZZZX4078Bearing · roughBALL BEARING ROUGH. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.Apr 19, 1997 · N951AM · Bolkms BK117A3 · Main Rotor HeadSDR HAIHEEA9369Actuator · leakACTUATOR LEAK BETWEEN ELECTRO MECHANICAL ACTUATOR AND HYDRAULIC SERVO BODY.Apr 16, 1997 · N401PH · Bolkms BK117A3 · Tail Rotor Control SystemSDR HAIHEEA9330Blade · bulgingBLADE BULGING BEYOND LIMITS.Apr 15, 1997 · N8765J · Bolkms BK117A3 · Main Rotor BladesSDR 97ZZZX3617Computer · malfunctionPITCH AND ROLL CSAS CAUTION LIGHT ILLUMINATED INTERMITTENTLY.Apr 1, 1997 · N911MZ · Bolkms BK117A3 · Autopilot ComputerSDR 97ZZZX3595Fire Bottle · failedFIRE EXTINGUISHER BOTTLE LOST PRESSURE AND CONTENTS.Mar 31, 1997 · N117LS · Bolkms BK117A3 · Extinguishing SystemSDR 97ZZZX3594Computer · malfunctionSPAS LIGHT WILL NOT EXTINGUISH ON ANNUNCIATOR PANEL.Mar 14, 1997 · N1140H · Bolkms BK117A3 · Autopilot ComputerSDR HEEA979157Fuel Pump · leakingON ENGINE INSTALLATION RUNUPS FUEL FOUND LEAKING EXCESSIVELY FROM FUEL PUMP CASE DRAIN. REPLACED FUEL PUMP.Mar 3, 1997 · N401PH · Bolkms BK117A3 · Engine Fuel PumpSDR 97ZZZX2318Pin · wornSECONDARY BLADE PIN WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 28, 1997 · N528SF · Bolkms BK117A3 · Main Rotor HeadSDR 97ZZZX2317Pin · wornSECONDARY BLADE PIN WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 28, 1997 · N528SF · Bolkms BK117A3 · Main Rotor HeadSDR 97ZZZX2316Blade Pin · wornSECONDARY BLADE PIN WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 28, 1997 · N528SF · Bolkms BK117A3 · Main Rotor HeadSDR 97ZZZX2136Blade Pin · wornSECONDARY BLADE PIN WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 28, 1997 · N528SF · Bolkms BK117A3 · Main Rotor HeadSDR HEEA979028Transmitter · defectiveUNIT TRANSMITS LOW.Feb 10, 1997 · N401PH · Bolkms BK117A3 · Main Rotor Indicating System
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