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 HEEA979027Indicator · faultyLIMIT LIGHT COMES ON TOO SOON.Feb 10, 1997 · N401PH · Bolkms BK117A3 · Main Rotor Indicating SystemSDR HEEA979019Control Display · faultyDIMMING CONTROL NOT WORKING, STAYS BRIGHT. REPLACED V101 PHOTOCELL AND S103 IDT SWITCH. REPAIRED. TESTED. CHECKED 28V LIGHTING. BENCH CHECK GOOD.Feb 10, 1997 · N911NC · Bolkms BK117A3 · ATC Transponder SystemSDR 98ZZZX579Manifold · 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 TFeb 5, 1997 · N117LS · Bolkms BK117A3 · Engine Fuel DistributionSDR 97ZZZX2151Bearing · wornBEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.Jan 23, 1997 · N527SF · Bolkms BK117A3 · Tail Rotor HeadSDR 97ZZZX1348Pump · leakingLEAKING AT CASE DRAIN WHEN PUMP IS SHUT OFF. NEW PUMP, LASTED ONLY 15 MINUTES IN OPERATION.Jan 20, 1997 · N1140H · Bolkms BK117A3 · Fuel Boost PumpSDR 97ZZZX1342Gyro Horizon · inoperableGYRO HORIZ PITCH AND ROLL CSAS INOPERABLE.Jan 17, 1997 · N911MZ · Bolkms BK117A3 · Attitude Gyro and Indicating SystemSDR 97ZZZX2150Bolt · wornBOLT WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jan 15, 1997 · N527SF · Bolkms BK117A3 · Tail Rotor HeadSDR HEEA978849Support · crackedTUBE SUPPORT CRACKED COMPLETELY ON INNER CORE.Jan 10, 1997 · N8765J · Bolkms BK117A3 · Engine Collector/Tailpipe/NozzleSDR 97ZZZX1343Computer · failedYAW COMPUTER HAD EHA FAILED IN FULL RETRACT POSITION.Jan 4, 1997 · N911MZ · Bolkms BK117A3 · Autopilot ComputerSDR 97ZZZX1340Gyro Horizon · failedHORIZON STARTED SPINNING AND TUMBLING IN-FLIGHT.Jan 2, 1997 · N911MZ · Bolkms BK117A3 · Attitude Gyro and Indicating SystemSDR HEEA968811Mount · crackedONE LEG OF ENGINE MOUNT CRACKED IN HALF.Dec 30, 1996 · N911NC · Bolkms BK117A3 · Engine Mount SectionSDR 97ZZZX2433Seal · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine Engine Accessory DriveSDR 97ZZZX2432Seal · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH 3 EACH NEW UNITS, CORRECTED PROBLEM.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine Engine Accessory DriveSDR 97ZZZX2431Seal · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 97ZZZX2430Seal · leakingSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine Engine Accessory DriveSDR 97ZZZX2429Shaft · defectiveCOMPRESSOR SHAFT IMPROPER STRETCH. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 97ZZZX2428Seal Ring · wornSEAL RING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine SectionSDR 97ZZZX2427Turbine · blade shiftROTOR ASSY FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT NR 9 -0.026 INCH. REPLACED WITH USED UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES, 3,172.3.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine SectionSDR 97ZZZX2426Seal · leakSEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine Engine Accessory DriveSDR 97ZZZX2425Spring · wornSEAL RING EXPANDER SPRING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.Dec 27, 1996 · N202HN · Bolkms BK117A3 · Turbine SectionSDR 97ZZZX2137Bearing · wornBEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.Dec 16, 1996 · N951AM · Bolkms BK117A3 · Tail Rotor HeadSDR 97ZZZX1375Gearbox · wrong partGEARBOX WAS REMOVED FROM BK117, S/N 7146, AND ASB BK117-10-109 WAS NOT C/W DURING OVERHAUL. THIS GEARBOX WAS TO BE USED ON A BO105S, S/N 2033, AND IS NOT ALLOWED TO BE IAW THIS ASB.Dec 16, 1996 · Bolkms BK117A3 · Tail Rotor GearboxSDR 97ZZZX1395Actuator · leakedCARGO DOOR STRUT LEAKED OVERNIGHT AFTER INSTALLING NEW.Dec 15, 1996 · N4493X · Bolkms BK117A3 · Cargo/Baggage DoorsSDR 97ZZZX1353Starter · malfunctionedSTARTER/GENERATOR MALFUNCTION. ENGINE SLOW TO START.Dec 14, 1996 · N118LL · Bolkms BK117A3 · Starter-GeneratorSDR HEEA968729Indicator · intermittentINDICATOR INTERMITTENT. TIME SINCE REPAIR 31:25.Dec 13, 1996 · N401PH · Bolkms BK117A3 · Main Rotor Indicating SystemSDR HEEA968728Transmitter · intermittentTORQUE TRANSMITTER INTERMITTENT. TIME SINCE REPAIR 31:25.Dec 13, 1996 · N401PH · Bolkms BK117A3 · Main Rotor Indicating SystemSDR 97ZZZX1341Indicator · defectiveINDICATOR TESTS PASSED THE CALIBRATION LINE.Dec 13, 1996 · N911MZ · Bolkms BK117A3 · Main Rotor Indicating SystemSDR 98ZZZX583Manifold · 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 2, 1996 · N911MZ · Bolkms BK117A3 · Engine Fuel DistributionSDR 97ZZZX1347Transceiver · inoperativeINOPERABLE COCKPIT VHF.Nov 25, 1996 · N117CH · Bolkms BK117A3 · VHF Communications SystemSDR 97ZZZX1345Transceiver · failedTRANSCEIVER WILL NOT TRANSMIT.Nov 25, 1996 · N117CH · Bolkms BK117A3 · VHF Communications SystemSDR 97ZZZX2962Bearing · failedNR 2 BEARING FAILURE. DURING START, NR 2 ENGINE FAILED. NR 1 ENGINE WAS AT GROUND IDLE. FAILURE OCCURRED AT 40 PERCENT N1 DURING START-UP. ALL PARAMETERS WERE NORMAL AND WITHIN LIMITS. THERE WAS A SUDDEN LOUD NOISE FOLLOWED BY SMOKE FROM THE TAILPIPE AND Nov 22, 1996 · N532KH · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR 97ZZZX2321Switch · failedPRESSURE SWITCH WILL NOT ILLUMINATE AT MINIMUM PRESSURE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 19, 1996 · N625MB · Bolkms BK117A3 · Engine Oil PressureSDR 97ZZZX1346Transceiver · failedTRANSCEIVER WILL NOT RECEIVE. DID NOT WORK WHEN INSTALLED.Nov 12, 1996 · N117CH · Bolkms BK117A3 · VHF Communications SystemSDR 97ZZZX637Blade · crackedM/R BLADE CRACKS AND SKIN BULGING. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 7, 1996 · N528SF · Bolkms BK117A3 · Main Rotor BladesSDR 97ZZZX636Blade · crackedM/R BLADE CRACKS AND SKIN BULGING. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 7, 1996 · N528SF · Bolkms BK117A3 · Main Rotor BladesSDR 97ZZZX1377Mount Link · out of limitsENGINE MOUNT LINK DIMENSIONS OUT OF LIMITS.Nov 6, 1996 · Bolkms BK117A3 · Engine Mount SectionSDR HEEA968414Transceiver · indicator inopDME INDICATOR INOPERATIVE. (COMPONENT DETACHED FROM CIRCUIT BOARD) FOUND C125 CAPACITOR LOOSE IN UNIT. REPLACED C125 CAPACITOR. UNIT STILL INOPERATIVE. FOUND L202 COIL HAD BROKEN LEAD AND WAS DETACHED FROM BOARD AT ONE END. CLEANED UP BOARD AND WAS ABLE TNov 4, 1996 · N8765J · Bolkms BK117A3 · DME/TACAN SystemSDR HEEA968400Indicator · reads highTOT INDICATOR READS 10-15 PERCENT C HIGH THROUGHOUT RANGE.Oct 25, 1996 · N401PH · Bolkms BK117A3 · Engine EGT/TIT Indicating SystemSDR HEEA968399Indicator · failedTOT INDICATOR CHECKED BAD.Oct 25, 1996 · Bolkms BK117A3 · Engine EGT/TIT Indicating SystemSDR 97ZZZX2315Bearing · wornBEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 22, 1996 · N527SF · Bolkms BK117A3 · Tail Rotor HeadSDR 96ZZZX5991Transceiver · failedTRANSCEIVER WILL NOT TRANSMIT. IN A/C ONLY 3.5 HRS BEFORE FAILURE.Oct 18, 1996 · N117CH · Bolkms BK117A3 · VHF Communications SystemSDR 96ZZZX5992Transceiver · failedTRANSCEIVER WILL NOT TRANSMIT.Oct 16, 1996 · N117CH · Bolkms BK117A3 · VHF Communications SystemSDR HEEA968297Indicator · reads highINDICATES HIGH OUT OF TOLERANCE AT 100%. STICKS ON START.Oct 14, 1996 · N911NC · Bolkms BK117A3 · Engine RPM Indicating SystemSDR 97ZZZX2424Bearing · defectiveNR 2 BEARING HAS FLAT SPOTS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 11, 1996 · N117MV · Bolkms BK117A3 · Turbine Engine Compressor SectionSDR HEEA968184Control Unit · malfunctionADJUSTMENT KNOBS FOR FREQUENCY CHANGE DON'T WORK PROPERLY. PERFORMED PRELIMINARY INSPECTION. CLEANED WAFERS, FOUND PHOTOCELL (V101) NOT DIMMING. REPLACED V101 PHOTOCELL. REPAIRED. RAISED HEADER (P101) AND APPLIED HUMISEAL. ALSO REPLACED 28V BULB (DS301). Oct 10, 1996 · N911NC · Bolkms BK117A3 · VHF Communications SystemSDR HEEA968182Indicator · lights inopINSTRUMENT LIGHTS ON 1/2 WORK. FOUND 4 BURNT LAMPS. PERFORMED PRELIMINARY INSPECTION. REPLACED 4 EACH LAMPS. PERFORMED COMPLETE CALIBRATION AND ALIGNMENT. BENCH CHECK GOOD.Oct 10, 1996 · N401PH · Bolkms BK117A3 · Ground Proximity SystemSDR HEEA968093Transceiver · defectiveSQUELCH STAYS ON.Oct 3, 1996 · N8765J · Bolkms BK117A3 · VHF Communications SystemSDR HEEA968077Transceiver · defectiveWILL NOT TRANSMIT. FOUND UNIT TO HAVE INTERMITTENT TRANSMIT POWER AND WEAK RECEIVER SENSITIVITY. ADJUSTED PRESELECTOR TUNING VOLTAGE AND ALIGNED RECEIVER, REPAIRED RECEIVER SENSE PROBLEM. UNIT HAS INTERMITTENT TRANSMIT PROBLEM FROM 138-140MHZ, REPLACED VCO MOct 3, 1996 · N401PH · Bolkms BK117A3 · VHF Communications SystemSDR HEEA967981Manifold · crackedENGINE LEAK CHECK REVEALED: FUEL LEAKING FROM FUEL MANIFOLD TUBING. REPLACED DISCREPANT PART.Sep 30, 1996 · N911NC · Bolkms BK117A3 · Engine Fuel DistributionSDR 96ZZZX5770Transceiver · inoperativeINOP WHEN INSTALLED IN A/C - WILL NOT TRANSMIT.Sep 22, 1996 · N911MZ · Bolkms BK117A3 · VHF Communications System
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