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 HEEA0013931Gps · failedGPS NOT PICKING UP SATELLITES.Apr 16, 1998 · N911NC · Bolkms BK117A3 · Global Positioning SystemSDR 98ZZZX1684Actuator · failedINTERNAL BREAKDOWN OF AIR FLOW MODULATOR (FLOW FENCE ACTUATOR) CAUSED THE OCCURRENCE OF COMPRESSOR STALLS DURING APPROACH TO LANDING.Apr 16, 1998 · N967LS · Bolkms BK117A3 · Fuel Controlling SystemSDR 98ZZZX3102Switch · mismanufacturedTOGGLE SWITCH REJECTED, NEW OUT-OF-BOX. WILL NOT LOCK IN THE 'ON' POSITION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Apr 8, 1998 · N127HH · Bolkms BK117A3 · DC Power Distribution SystemSDR HEEA0013829Indicator · intermittentAIRSPEED INDICATOR LIGHTS INTERMITTENT.Apr 2, 1998 · N401PH · Bolkms BK117A3 · Airspeed/Mach IndicatorSDR 98ZZZX1778Indicator · failedTRIPLE TACH NR 2 ENGINE RPM INTERMITTENT. REMOVED AND REPLACED.Mar 30, 1998 · N4493X · Bolkms BK117A3 · Engine RPM Indicating SystemSDR 98ZZZX1753Transducer · failedOIL PRESSURE TRANSDUCER FLUCTUATES AND DROPS TO ZERO. REMOVED AND REPLACED.Mar 20, 1998 · N117CH · Bolkms BK117A3 · Engine Oil PressureSDR 98ZZZX1797Bearing · wornBEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 10, 1998 · N424MB · Bolkms BK117A3 · Tail Rotor Drive ShaftSDR 99ZZZX212Control Unit · failedCONTROL UNIT FOR EXTERNAL LIGHTS HAS INTERNAL SHORT. TRIPPED CIRCUIT BREAKERS UPON INSTALLATION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 9, 1998 · N163BK · Bolkms BK117A3 · Exterior LightingSDR 98ZZZX3384Harness · failedHARNESS HAS INTERNAL SHORT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 9, 1998 · N158BK · Bolkms BK117A3 · Engine Indicating SystemSDR HEEA0013317Indicator · failedNR1 SUPPLY INOPERATIVE.Mar 5, 1998 · N401PH · Bolkms BK117A3 · Fuel Quantity IndicatorSDR HEEA0013183Receiver · failedDOES NOT TRANSMIT.Mar 4, 1998 · N401PH · Bolkms BK117A3 · VHF Communications SystemSDR 98ZZZX1499Control Unit · failedINTERNAL MALFUNCTION OF COPILOT INSTRUMENT LIGHTING CONTROL UNIT. WHEN CONTROL UNIT FAILED, IT PRODUCED SMOKE AND ELECTRICAL FUMES ACCORDING TO PILOT.Mar 1, 1998 · N118LL · Bolkms BK117A3 · Flight Compartment LightingSDR 98ZZZX3376Pickup · failedPICKUP REJECTED PER SB 0163 (IMPROPER MARKINGS AND POSSIBLE REVERSE POLARITY). REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 28, 1998 · N528SF · Bolkms BK117A3 · Engine RPM Indicating SystemSDR 98ZZZX3375Pickup · failedPICKUP REJECTED PER SB 0163 (IMPROPER MARKINGS AND POSSIBLE REVERSE POLARITY). REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 28, 1998 · N528SF · Bolkms BK117A3 · Engine RPM Indicating SystemSDR 98ZZZX3389Bearing · wornBEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 18, 1998 · N202HN · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX3388Seal · wornSEAL WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 18, 1998 · N202HN · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX3387Seal · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 18, 1998 · N202HN · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX3386Seal · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 18, 1998 · N202HN · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR HEEA0012773Transponder · failedTRANSPONDER HAS NO OUTPUT.Feb 5, 1998 · N911NC · Bolkms BK117A3 · ATC Transponder SystemSDR 98ZZZX3383Seal · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jan 28, 1998 · N117MA · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX3382Seal · wornSEAL WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jan 28, 1998 · N117MA · Bolkms BK117A3 · Turbine SectionSDR HEEA0012698Control · failedDISPLAY DOES NOT LIGHT UP. PERFORMED PRELIMINARY INSPECTION. FOUND NO DISPLAY. SWAPPED DISPLAY DS103. NO HELP. SWAPPED BOARDS. FOUND PROBLEM ON PROCESSOR BOARD. TROUBLESHOT AND FOUND BROKEN FOIL ON BOARD. REPAIRED BROKEN FOIL, REPAIRED, INSTALLED MOD 2 Jan 26, 1998 · N401PH · Bolkms BK117A3 · ATC Transponder SystemSDR HEEA0012690Indicator · failedCOMPASS FLAG STAYS IN VIEW.Jan 26, 1998 · N7040U · Bolkms BK117A3 · Visual Omnirange (VOR) SystemSDR 98ZZZX1796Bearing · wornBEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.Jan 26, 1998 · N163BK · Bolkms BK117A3 · Tail Rotor HeadSDR 98ZZZX1356Blade · defectiveT/R BLADE PAINT BEGINNING TO PEEL. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jan 26, 1998 · N163BK · Bolkms BK117A3 · Tail Rotor BladesSDR 98ZZZX1355Blade · defectiveT/R BLADE PAINT BEGINNING TO PEEL. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jan 26, 1998 · N163BK · Bolkms BK117A3 · Tail Rotor BladesSDR 98ZZZX949Battery · failedBATTERY WEAK, SLOW STARTS, WILL NOT TOP CHARGE AFTER 4 HOURS. GREEN LIGHT WOULD NOT COME ON. REMOVED AND REPLACED.Jan 19, 1998 · N117CH · Bolkms BK117A3 · Battery/Charger SystemSDR 98ZZZX946Stormscope · failedSTORMSCOPE UNIT NOT RECEIVING INPUT. REMOVED AND REPLACED.Jan 14, 1998 · N4493X · Bolkms BK117A3 · Non Radar Weather SystemSDR 98ZZZX948Switch · intermittentSWITCH ONLY MAKING CONTACT INTERMITTENTLY. DEFECTIVE UPON INSTALLATION. REMOVED AND REPLACED.Jan 7, 1998 · N1140H · Bolkms BK117A3 · Engine Starting SystemSDR HEEA0012428Inner Sleeve · wornT/R HEAD BEARING BUSHING SEATS AND SEAL RIDE WORN.Jan 5, 1998 · N401PH · Bolkms BK117A3 · Tail Rotor HeadSDR 98ZZZX911Bearing · defectiveOUTPUT SHAFT WOULD NOT FIT THROUGH ROLLERS WHEN BEARING WAS INSTALLED IN COVER OF T/R GEARBOX. REMOVED AND REPLACED.Jan 5, 1998 · Bolkms BK117A3 · Tail Rotor GearboxSDR 98ZZZX3722Seal · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 19, 1997 · N528SF · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX3721Bearing · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 19, 1997 · N528SF · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 98ZZZX1359Rotor Assy · defectiveTURBINE ROTOR ASSY FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT. REPLACED WITH USED UNIT, CORRECTED PROBLEM. PART TC: 3,001.Dec 19, 1997 · N528SF · Bolkms BK117A3 · Turbine SectionSDR 98ZZZX582Manifold · 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 TDec 16, 1997 · N4493X · Bolkms BK117A3 · Engine Fuel DistributionSDR 98ZZZX1148Seal · leakingRIGHT ENGINE NR 2 BEARING LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 9, 1997 · N127HH · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 98ZZZX335Valve · failedVALVE INOPERATIVE. REMOVED AND REPLACED.Dec 8, 1997 · N527MB · Bolkms BK117A3 · Pneumatic Distribution SystemSDR 98ZZZX268Indicator · failedNG INDICATOR SLOW TO INDICATE, FALLS OFF-LINE AT 5 PERCENT ON DECELERATION. REMOVED AND REPLACED.Nov 25, 1997 · N117CH · Bolkms BK117A3 · Engine RPM Indicating SystemSDR 98ZZZX105Computer · inoperativeCOMPUTER UNIT INOPERATIVE. REPLACED WITH USED UNIT, CORRECTED PROBLEM.Nov 24, 1997 · N158BK · Bolkms BK117A3 · Autopilot ComputerSDR HEEA0012080Control Unit · failedCONTROL POPS CIRCUIT BREAKER.Nov 19, 1997 · N401PH · Bolkms BK117A3 · Flight Compartment LightingSDR 98ZZZX947Drain Valve · leakingFUEL TANK HAS STATIC LEAK AT DRAIN VALVE. REMOVED AND REPLACED.Nov 18, 1997 · N1140H · Bolkms BK117A3 · Fuel StorageSDR 98ZZZX283Computer · failedCSAS COMPUTER CAUSES FLUCTUATIONS IN PITCH ACTUATOR. NOISY SIGNAL COMING OUT OF PINS 18 AND 19. REMOVED AND REPLACED.Nov 13, 1997 · N911MZ · Bolkms BK117A3 · Autopilot ComputerSDR 98ZZZX282Artificial Horiz · noisyARTIFICIAL HORIZ CAUSES CSAS PITCH ACTUATOR TO FLUCTUATE. SIGNAL OUT OF PINS, X AND Y ARE TOO NOISY SIMULATING PITCH UP OR DOWN. REMOVED AND REPLACED.Nov 13, 1997 · N911MZ · Bolkms BK117A3 · Attitude Gyro and Indicating SystemSDR 98ZZZX269Indicator · failedNG INDICATOR SLOW TO INDICATE. FALLS OFF-LINE ON DECELERATION AT 8 PERCENT. READS ALMOST 2 PERCENT LOW. REMOVED AND REPLACED.Nov 12, 1997 · N117CH · Bolkms BK117A3 · Engine RPM Indicating SystemSDR HEEA0011863Transceiver · failedRT138 PIN ON FRONT CONNECTOR BROKEN. POPS CIRCUIT BREAKER.Nov 10, 1997 · N401PH · Bolkms BK117A3 · VHF Communications SystemSDR HEEA0011859Transceiver · failedTRANSCEIVER WILL NOT TRANSMIT. FOUND VR3 VOLTAGE REGULATOR ON VCO CONTROL BOARD INOPERATIVE. REPLACED VOLTAGE REGULATOR. REPAIRED UNIT. BENCH CHECK GOOD.Nov 10, 1997 · N401PH · Bolkms BK117A3 · VHF Communications SystemSDR 98ZZZX270Indicator · failedNG INDICATOR SLOW TO INDICATE AND FALLS OFF-LINE ON DECELERATION. PREVIOUSLY SENT FOR WARRANTY REPAIR ON P.O. 93129. FAILED APPROXIMATELY ONE WEEK AFTER INSTALLATION.Nov 6, 1997 · N117CH · Bolkms BK117A3 · Engine RPM Indicating SystemSDR HEEA0011798Filter Assy · malfunctionedFILTER ASSY BYPASS INDICATOR DOES NOT PROPERLY OPERATE.Nov 5, 1997 · N911NC · Bolkms BK117A3 · Main Rotor GearboxSDR 97ZZZX5132Control · overheatINSPECTED RHEOSTAT, WIRING, AND INTENSITY CONTROL UNIT. FOUND CONTROL UNIT TO HAVE STRONG ELECTRICAL ODOR. REPLACED WITH NEW UNIT. OPS CHECK GOOD.Nov 1, 1997 · N911MZ · Bolkms BK117A3 · Flight Compartment LightingSDR HEEA0011689Indicator · failedRPM INDICATOR WILL NOT INDICATE.Oct 22, 1997 · N401PH · Bolkms BK117A3 · Engine RPM Indicating System
Back to MBB BK 117 A-3