JASC 6320
Service difficulty reports · 1,931
Reports filed under 6320 · Main Rotor Gearbox, newest first.
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 jasc_code = '6320' 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.
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 jasc_code = '6320' ORDER BY difficulty_date DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
SDR HEEA967992Indicator · malfunctionTRANSMISSION OIL TEMPERATURE WILL FALL OFF LINE INTERMITTENTLY. MECHANICS GO TO AIRCRAFT AND WILL CHECK AND FIND TEMPERATURE IS INDICATING NORMALLY.SDR 96ZZZX5610Housing · damagedDURING OVERHAUL INSPECTION OF M/R TRANSMISSION, A DEEP GOUGE .137 INCH WAS FOUND IN THE HOUSING COVER IN THE FWD T/R O/P PINION BEARING BOX CAUSED BY THE BEARING FAILURE.SDR 96ZZZX5608Shaft · damagedDURING OVERHAUL INSPECTION OF M/R TRANS, THE T/R OUTPUT PINION SHAFT WAS FOUND DAMAGED BEYOND LIMITS FROM A BROKEN BEARING RACE GOUGING THE BEARING LAND AND RETAINING RING LIP.SDR 97ZZZX1344Transmitter · defectiveOIL PRESSURE TRANSMITTER CAUSING OIL PRESSURE TO SPIKE INTERMITTENTLY.SDR 96ZZZX5159Transmission · noise/leakDURING 3,000-HOUR OVERHAUL TIME, FOUND NOISE AND WHINE IN TRANSMISSION AND LEAK ING INPUT SEAL. COMPLETE REPLACEMENT OF TRANSMISSION.SDR CA960925002Bearing · cracked(CAN) INVESTIGATION REVEALED THAT THE BEARING P/N 369D25146 HAD A LONGITUDINAL CRACK ENTIRELY THROUGH THE INNER RACE. THE BEARING INNER RACE IS MOUNTED ON A PINION P/N 369D25125-13. THE RETAINING RING P/N RSN-118 CAME OFF ALLOWING THE INNER RACE TO MOVE PARTIASDR CA961018024Bearing · pitted(CAN) M/R TRANSMISSION EPICYCLIC REDUCTION GEARS REMOVED DUE TO UPPER ROLLER BEARING IN ONE OF THE PLANETARY GEARS BREAKING DOWN AND MAKING METAL.SDR CA960924039Transmission · cracked(CAN) INSPECTION OF TRANSMISSION REVEALED A CRACK AT THE LIFT LINK FITTING ATTACHMENT. ALSO APPEARS AS IF THE GEARBOX WAS WEEPING OIL FROM CRACK.SDR CA961024018Switch · malfunction(CAN) MAIN ROTOR TRANSMISSION PRESSURE LIGHT ON ALL THE TIME. CHANGED PRESSURE SWITCH.SDR 96ZZZX5085Main Gearbox · defectiveTROUBLESHOOTING VIBRATION PROBLEM DISCOVERED TRANSMISSION INPUT PINION SHAFT WAS LOOSE. REMOVED SHORT SHAFT AND RELATED ACCESSORIES AND FOUND INPUT PINION SHAFT HAD LOSS OF PRE-LOAD TORQUE. INPUT PINION SHAFT NUT PN DH5439-111-42 STILL APPEARED TIGHT, BUT ROSDR 96ZZZX5174Bearing · failedDURING INSPECTION OF M/R TRANSMISSION AFTER CHIP LIGHT, THE FORWARD INPUT PINION BEARING WAS FOUND CONTAMINATED WITH IMPREGNATED METAL.SDR 96ZZZX4684Bearing · defectiveDURING INSPECTION OF MAIN ROTOR TRANSMISSION AFTER CHIP LIGHT, FOUND 369D25149 OUTPUT SHAFT BALL BEARING TO BE SEVERELY ETCHED ON ONE BALL.SDR ERAA96296Bearing · failedOUTER RACE BREAKING DOWN.SDR 96ZZZX4705Chafe Tape · detachedDURING CRUISE FLIGHT, ACFT EXPERIENCED A SUDDEN RIGHT YAW, A RAPID RISE IN TURBINE OUTLET TEMPERATURE (TOT), AND A TORQUE REDUCTION IN THE NR 1 ENGINE. REDUCING THE POWER LEVER TO IDLE ARRESTED THE RISE IN TOT AND AN UNEVENTFUL EMERGENCY LANDING WAS MADE. NOSDR 96ZZZX4685Bearing · crackedDISASSEMBLED MAIN ROTOR TRANSMISSION AFTER CHIP LIGHT. FOUND THE FORWARD SUPPORT BEARING FOR THE TAIL ROTOR O/P SHAFT HAD A CRACKED INNER RACE AND THAT IT HAD FORCED THE SNAP RING OFF OF THE END OF THE SHAFT AND THEN THE INNER RACE GOUGED INTO THE COVER ASSEMSDR CA960826102Bolt · cracked(CAN) WHILE COMPLYING WITH AD 95-26-08, MPI INSPECTION OF THE MAIN ROTOR SHAFT, THESE BOLTS WERE ALSO MPI'D REVEALING CRACKS UNDER THE HEAD IN 4 OUT OF 5 BOLTS. SUGGEST MPI INSPECTION OF THE BOLTS BE DONE TO COINCIDE WITH THE SHAFT INSPECITON.SDR CA960916011Bearing · peeling(CAN) L/H INPUT BEARING ROLLERS PEELING.SDR CA961007013Sun Gear · fractured(CAN) PILOT NOTED SEVERE VIBRATION WITH NO WARNING. PRIOR TO SHUTDOWN, THE TORQUE WENT TO ZERO. AIRCRAFT RETURNED OK. INSPECTION REVEALED THE PLANETARY PIN P/N 868051-1 WAS CHAFED BY THE PLANETARY GEAR P/N 358268-1 WHICH IN TURN ABNORMALLY LOADED THE SUN GESDR CA960919001Transmission · broken pin(CAN) CHECK OF THE MAST MOVEMENT ON THE GROUND WAS EXCESSIVE AS IF THE ISOLATION MOUNT WAS NOT WORKING. A CLOSER INSPECTION SHOWED THE PIN ASSEMBLY TO BE BROKEN.SDR MVH0064219Brush · debondedGIMBLE RING BUSHINGS DEBONDED AND WORN.SDR 96ZZZX4282Transmission · seal leakROTOR TACHOMETER GEN SEAL LEAKS INTO OIL COOLER BLOWER INLET, AIR/OIL MIX TURE GETS DISTRIBUTED OVER HOT 250C20R ENGINE. REMAINDER OF AIR OIL MIXTURE ENTERS HEATER DUCTS. WHEN PILOT SELECTS HEATER, HAZARDOUS AIR/OIL MIXTURE FILLS COCKPIT. THIS PAD SHOULD HASDR 96ZZZX3969Sun Gear · failedFOLLOWING THE ACCIDENT OF A BO105S, AN INVESTIGATION REVEALED THE SUN GEAR (PN 4638-304-001) IN THE MAIN ROTOR TRANSMISSION HAD FAILED. THE EXACT CAUSE OF THE FAILURE TO THIS SUN GEAR HAS NOT BEEN DETERMINED. THIS SAME SUN GEAR HAD BEEN IN THE MAIN ROTOR TRASDR 96ZZZX4103Pulley Assy · bottom outON SOME MAIN ROTOR TRANSMISSION ASSEMBLIES, THE SPLINES ON THE PULLEY ASSEMBLY DRIVER BOTTOM OUT ON THE SPLINES OF THE GEARSHAFT INPUT BEVEL PINION (369A5107-21). THIS RESULTS IN A GAP BETWEEN THE GUARD (369H5657) AND THE SPACER (369A5165). OPERATING WITH THSDR 96ZZZX5867Detector · malfunctionMGB WARNING LIGHT COMES ON VERY DIMLY WHEN BATTERY IS SWITCHED ON. THEN LIGHT GOES OUT AFTER 2 TO 3 SECONDS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.SDR CA960826103Output Shaft · bulged(CAN) WHILE ACCOMPLISHING CF-88-09 PER DN 148.1, BULGE OR DEFORMATION FOUND ON THE UPPER DISC.TIME SINCE LAST INSPECTION, 293 HOURS.SDR 96ZZZX4625Transmission · leakingDURING PRE-FLIGHT INSPECTION, PILOT NOTICED A PUDDLE OF OIL (BLUE IN COLOR) ON THE GROUND BENEATH THE HELICOPTER. INSPECTION OF THE HELICOPTER BY A MAINTENANCE TECHNICIAN REVEALED TRANSMISSION OIL WAS LEAKING FROM THE LOWER TRANSMISSION HOUSING COVER PARTINGSDR CA960826040Transmission · failure(CAN) METAL ON CHIP DETECTOR INDICATING INTERNAL FAILURETRANSMISSION REPLACEDSDR CA960812015Transmission · making metal(CAN) TRANSMISSION MAKING METAL. 155.9 HOURS OUT OF OVERHAUL.SDR 96ZZZX4275Duplex Bearing · failedTRANSMISSION MAKING METAL AT 702.5 TSO. FOUND DEFECTIVE LOWER DUPLEX BEARING. BEARING HAD 702.5 HOURS SINCE NEW.SDR 96ZZZX5180Transmission · making metalINSTALLED DUPLEX BEARING 206-040-032-101, SN MB472, INTO ABOVE TRANSMISSION WHEN BEARING WAS NEW. AIRCRAFT FLEW 465.9 HOURS AND BEARING MAKING METAL.SDR HEEA967522Case Assy · corrodedPART IS CORRODED. (CORROSION IN LARGE BOLT HOLES AND PITTING ON MOUNTING SURFACE.SDR HEEA967512Seal Assy · pittedSEAL IS PITTED.SDR 96ZZZX4644Bearing · failedLOWER DUPLEX BEARING BAD. CONTAMINATED TRANSMISSION, DAMAGING OIL PUMP, AND GEARSHAFT ROLLER BEARING. TRANSMISSION COMPLETELY TORN DOWN, INSPECTED, CLEANED, AND REASSEMBLED. TSO: 702.5 HOURS TOTAL TIME OF DEFECTIVE DUPLEX BEARING. 702.5 HOURS AND 9 MONTHSDR CA960826105Transmission · making metal(CAN) MAIN GEARBOX REMOVED DUE TO METAL FOUND IN OIL FILTERSDR HEEA967477Case Assy · cloggedCASE ASSY CLOGGED OIL PASSAGE.SDR HEEA967471Upper Housing · worn excessPART IS WORN EXCESSIVELY. (BUSHING BORE WORN BEYOND LIMITS)SDR HEEA967470Indicator · erraticPILOT REPORTED TEMPERATURE FLUX OF 40 DEGREE IN FLIGHT.SDR ERAA96250Bevel Gear Set · making metalGEARBOX MAKING METAL, GEAR SET HAS HARD WEAR LINE AND NICADING COMING OFF, ALL BEARINGS HAVE BEEN CHANGED TWICE.SDR AU960963Bearing · faulty(AUS) TRANSMISSION MAIN INPUT QUILL DUPLEX BEARING CONTAINED ONE DELAMINATED BALL - NIL DAMAGE TO INNER RACESDR 96ZZZX5756Spacer Tube · wornSPACER TUBE WORN BEYOND LIMITS.SDR CA960619026O-Ring · leaking(CAN) UPPER MAIN ROTOR TRANSMISSION O-RING LEAKING. AS TRANSMISSION WARMED TO OPERATING TEMPERATURE THE NEW PAINT MELTED AND UNSEATED O-RING.SDR CA960826034Seal · leaking(CAN) DURING PREFLIGHT INSPECTION, PILOT NOTICE A SIGNIFICANT AMOUNT OF OIL IN THE TRANSMISSION AREA. MAGNETIC SEAL LEAKING, REPLACED.SDR CA960812012Transmission · leaking(CAN) AFTER A SHORT FLIGHT PILOT NOTICED MAJOR AMOUNT OF OIL COMING FROM TRANSMISSION AREA. ENGINEER DISCOVERED MAGNETIC SEAL.LEAKING.SDR 96ZZZX3836Pinion Shaft · wornMAIN ROTOR TRANSMISSION LOCKNUT LOST TORQUE AND ALLOWED BEARINGS TO FRET ON SHAFT WEARING THE SHAFT UNDER THE BEARINGS AND ACCESSORY DRIVE GEAR. THIS ALLOWED THE DRIVE PIN TO SHEAR AND WHENEVER TORQUE WAS BELOW 6 PERCENT ENGINE TORQUE, THE OIL PUMP AND ROTOR SDR 96ZZZX3236Pinion Shaft · wornOIL COOLER DRIVE BELT PULLEY HAD WORN THE SPLINES TO BELOW THE 'OVER-PIN' LIMITS. THE PULLEY WAS SEIZED ON THE PINION SHAFT.SDR HEEA967336Pump · shaft wornPUMP HOUSING DAMAGED AND SHAFT WORN IN SEAL AREA.SDR HEEA967335Pump · damagedPUMP HOUSING DAMAGED AND SHAFT WORN IN SEAL AREA.SDR AU960864Bolt · loose(AUS) MAIN GEARBOX BEVEL GEAR BOLTS LOOSE - FOUND DURING INSPECTION IAWAD/ECUR/21SDR HEEA967276Tranmission · making metalTRANSMISSION HAS METAL IN OIL.SDR AU960819Bearing · failed(AUS) TRANSMISSION FAN DRIVE BEARING FAILED - METAL CONTAMINATION OF OIL SYSTEM
Back to JASC 6320