JASC 6330
Service difficulty reports · 603
Reports filed under 6330 · Main Rotor Transmission Mount, 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 = '6330' 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 = '6330' 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 QMLA2025011720003Mount · delaminatedPILOT REPORTED AN UNUSUAL VIBRATION IN FLIGHT. AFTER INSPECTING TRANSMISSION CORNER MOUNTS WE FOUND THAT THE LH CORNER MOUNTS WERE DELAMINATING/SEPARATING. WE JUST INSTALLED THESE CORNER MOUNTS ON 10/11/25 AND SHOULDN'T HAVE FAILED ALREADY.SDR 2023FA0000275Restraint · unstakedSUPPORT BEARINGS IN TRANSMISSION RESTRAINT P/N SLS-030-910-109, HAVE BECOME "UN-STAKED" RESULTING IN A 1TO 1 VERTICAL VIBRATION.SDR 2A6R2021122262705Unknown · unknownAFTER REMOVAL OF MAIN GEAR BOX FOR OTHER MAINTENANCE. FOUND THE LEFT XY FITTING P/N L533M2001103 AND THE RIGHT XY FITTING P/N L533M2002103 CORRODED. CLEANED CORROSION AND FOUND BOTH OUT OF LIMITS. THE LEFT ONE IS GETTING REPLACE. THE RIGHT WAS JUST OUT OF SDR 8LFA20190104001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT HAND PLATE FITTING CRACKED.SDR 8LFA20180820001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR QMLA2018060518067Fitting · crackedFOUND CRACKED RT TRANSMISSION FITTING, 75MM LONG .SDR QMLA2018052918064Fitting · crackedFOUND A CRACKED RT TRANSMISSION FITTING DURING AN EDDY CURRENT INSPECTION IAW EO 49-5300-EO-2335.SDR QMLA2018052988065Fitting · crackedFOUND A CRACKED LT TRANSMISSION FITTING, FOUND DURING AN EDDY CURRENT INSPECTION IAW EO 49-5300-EO-2335.SDR 8LFA2018051608001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION LEFT PLATE FITTING CRACKED.SDR 2018FA0000130Fitting · crackedCRACKED MGB SUPPORT FITTING. COUNTER TORQUE CROSSBEAM FITTING PLATE WAS FOUND CRACKED.SDR 2018FA0000129Support Fitting · crackedCRACKED MGB SUPPORT FITTING. WHILE COMPLETING LEONARDO SB 119-087 LEFT HAND COUNTER TORQUE CROSSBEAM FITTING PLATE WAS FOUND CRACKED.SDR 8LFA201803200001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT HAND PLATE FITTING CRACKED.SDR 8LFA201800320001Fitting · crackedDURING INSPECTION, FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR 8LFA20171218001Fitting · crackedDURING INSPECTION, FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR QMLA2017110117123Mount · crackedDURING MAIN ROTOR TRANSMISSION CHANGE, FOUND THE LT AND RT AIRFRAME TRANSMISSION DECK FITTINGS CRACKED.SDR 8LFA20171011001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR 8LFA20170907001Fitting · crackedDURING INSPECTION, FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR 8LFA20170901001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKEDSDR 8LFA20170815003Fitting · crackedDURING INSPECTION, FOUND THE MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR 8LFA20170815002Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR 8LFA08152017001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR 8LFA20170815001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR 8LFA20170712001Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT PLATE FITTING CRACKED.SDR 8LFA20170712003Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT HAND PLATE FITTING CRACKED.SDR 8LFA20170712004Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT HAND PLATE FITTING CRACKED.SDR 8LFA20170712002Fitting · crackedDURING INSPECTION FOUND MAIN TRANSMISSION AFT RIGHT HAND PLATE FITTING CRACKED.SDR AC2R2016032901Fitting · galledWHILE PERFORMING THE MGB BOLT INSPECTION ON THE LT LOWER FITTING, WE REMOVED THE COTTER PIN AND REMOVED THE NUT FROM THE FWD BOLT. WE ENSURED THE BOLT SPUN FREELY BEFORE WE ATTEMPTED TO REMOVE THE BOLT, WHICH IT DID BY HAND. THE BOLT EASILY REMOVED UPWARD UNSDR CA160217004Spring · debonded(CAN) DEBONDING BETWEEN INNER MEMBER AND OUTER MEMBER OF ASSY. THE PITCH RESTRAINT SPRING ASSY DID HAVE AN ASB 429-13-10 ON 29 APRIL 2013 ON A LIMITED QUANTITY OF UNITS THAT WERE MFG WITH INADEQUATE ADHESIVE MIX RATIO BETWEEN THE TUBE AND THE HOUSING. THIS COSDR CA160217001Spring · debonded(CAN) DEBONDING BETWEEN INNER MEMBER AND OUTER MEMBER OF ASSY. THE PITCH RESTRAINT SPRING ASSY DID HAVE AN ASB 429-13-10 ON 29 APRIL 2013 ON A LIMITED QUANTITY OF UNITS THAT WERE MANUFACTURED WITH INADEQUATE ADHESIVE MIX RATIO BETWEEN THE TUBE AND THE HOUSINGSDR CA160215012Spring · debonded(CAN) DEBONDING BETWEEN INNER MEMBER AND OUTER MEMBER OF ASSY. THE PITCH RESTRAINT SPRING ASSY DID HAVE AN ASB 429-13-10 ON 29 APRIL 2013 ON A LIMITED QTY OF UNITS THAT WERE MFG WITH INADEQUATE ADHESIVE MIX RATIO BETWEEN THE TUBE AND THE HOUSING. THIS CONDITISDR CA160215011Spring · debonded(CAN) DEBONDING BETWEEN INNER MEMBER AND OUTER MEMBER OF ASSY. THE PITCH RESTRAINT SPRING ASSY DID HAVE AN ASB 429-13-10 ON 29 APRIL 2013 ON A LIMITED QTY OF UNITS THAT WERE MANUFACTURED WITH INADEQUATE ADHESIVE MIX RATIO BETWEEN THE TUBE AND THE HOUSING. THISDR CA160212001Restraint · unknown(CAN) DURING FLIGHT, A "BANG" HAS BEEN HEARD BY BOTH CREW. NO LOST OF FLIGHT OR ENGINE CONTROLS HAS BEEN NOTICED, NO ABNORMAL VIBRATIONS OBSERVED AND NO INDICATION OF ANY PROBLEMS FROM SYS ON DISPLAY UNITS. NO OTHERS OBSERVATIONS FOR THE REST OF FLIGHT AND LASDR CA160128005Spring · failed(CAN) PILOT REPORTED A VIBRATION (ABNORMAL) AND "SHIFTING" FELT IN HOVER AND DURING FLIGHT. A PRECAUTIONARY LANDING WAS CARRIED OUT. PILOTS OBSERVED THAT THE TRANSMISSION WAS RESTING ON "PIN BACK-UP MOUNTS". AN AME WAS DISPATCHED TO INSPECT THE ACFT, A FLIGHT SDR CA160128004Spring · debonded(CAN) PILOT REPORTED A VIBRATION, ABNORMAL AND "SHIFTING" FELT IN HOVER AND DURING FLIGHT. A PRECAUTIONARY LANDING WAS CARRIED OUT. PILOTS OBSERVED THAT THE TRANSMISSION WAS RESTING ON "PIN BACK-UP MOUNTS". AN AME WAS DISPATCHED TO INSPECT THE ACFT, A FLIGHSDR CA160125017Spring · debonded(CAN) PILOTS NOTED AN INCREASE IN VIBRATION AND A DEGRADE OF RIDE. ALSO TRANSMISSION STOP CONTACT WAS HEARD. THE HELICOPTER LANDED AND REMAINED AT LOCATION. THE CUSTOMER`S MAINTENANCE REPORT FINDING BOTH FORWARD AND AFT PITCH RESTRAINT SPRINGS DEBONDED.SDR CA160115008Sleeve · broken(CAN) DURING REMOVAL OF MAIN ROTOR GEARBOX, THE FORWARD AND REAR MGB MOUNT BOLTS AND SLEEVE BUSHINGS WERE REMOVED, 3 OF THE 4 SLEEVE BUSHINGS WERE FOUND TO BE COMPLETELY BROKEN, WITH THE 4TH CRACKED APPROXIMATELY 75 PERCENT OF THE CIRCUMFERENCE OF THE BUSHING SDR CHIR201511172182Bolt · brokenDURING DISASSEMBLY OF COMPONENT, SCUFFING ON BOTH THE SPIRAL BEVEL GEAR AND PINION GEAR WAS NOTED. THE CUSTOMER HAD REPORTED A SINGLE BOLT BROKEN UPON ON-WING TORQUE CHECK INSPECTION AND NO OTHER BOLTS APPEAR CRACKED AFTER DISASSEMBLY. NDT PENDING RESULTS. SDR CA140128005Mount · leaking(CAN) ACFT WAS FLOWN IN AVERAGE TEMPERATURES OF -25 DEGREES C FOR 2.5 HOURS. ACFT SAT ON THE GROUND FOR APPROXIMATELY 20 MIN POWER OFF IN THAT TIME. UPON LANDING AT BASE, IT WAS DISCOVERED THAT THE TRANSMISSION ARIS MOUNT HAS LOST ALL ITS FLUID IN THE FORWARSDR CA131024005Mount · failed(CAN) PILOT REPORTED AN AIRFRAME VIBRATION IN FLIGHT. AFTER TROUBLESHOOTING OF ALL AIRFRAME VIBRATION DAMPENING SYS AND MAIN ROTOR DYNAMIC BALANCING IT WAS DISCOVERED THAT THE REAR LT ARIS, TRANSMISSION MOUNT, WAS UNSERVICEABLE WITH NO INDICATION OF FAILURE. SDR CA130925002Nut · cracked(CAN) CRACKED NUT ON TRANSMISSION DECK MOUNT FITTING, FOUND DURING 100-HR INSPECTION.SDR QMLA2013061113078Mount · failedTHE PILOT NOTICED DURING CRUISE FLIGHT THAT THE HELICOPTER DEVELOPED AN UNUSUAL VIBRATION. IMMEDIATELY DIVERTED TO THE CLOSEST AIRPORT. FOUND THE LT AFT MAIN ROTOR GEARBOX MOUNT WAS UNSERVICEABLE DUE TO GLYCOL BEING RELEASED FROM THE BELLOWS. MOUNT WAS REPSDR CA130612003Mount · damaged(CAN) PILOT REPORTED A STRANGE INTERMITTENT VIBRATION. DURING A VISUAL INSPECTION, THERE WERE CONTACT MARKS ON THE LT AFT CORNER MOUNT UP STOP/SAFETY WASHER. UPON INSPECTION WITH THE CORNER MOUNT LIFT TOOL, THE LT AFT CORNER MOUNT WAS FOUND SEPARATED. ALL 4SDR QMLA2012062912108Stop · crackedLEFT AFT ARIS MOUNT EMERGENCY STOP HAS CRACK APPROX 150 DEGREES OF CIRCUMFERENCE APPROX .5" BELOW TOP SURFACE.SDR QMLA2012050112072Bar · damagedDURING PREFLIGHT INSPECTION, NOTICE LT FWD MGB SUPPORT BAR EXTREMELY EASY TO TWIST AND HAD A POPPING SOUND WHEN CHECKING BEARING PLAY. INSPECTED THE OTHER SUPPORT BARS AND FOUND THE RT FWD SUPPORT BAR LOWER CRIMPED COLLAR SHOWED MARKING THAT LOOKED LIKE IT HASDR ALGA2012032601Mount · corrodedCORROSION AT TRANSMISSION MOUNTS BEYOND LIMITS.SDR ALGA20122281201Support Case · corrodedTRANSMISSION SUPPORT CASE CORRODED BEYOND LIMITS.SDR CA120208002Mount · failed(CAN) ACFT WAS REPORTED ROUGH IN FLIGHT 35 HRS AFTER MAINTENANCE INSPECTION. DYNAMIC BALANCE EQUIPMENT WAS INSTALLED AND ACFT WAS FOUND TO BE WITHIN LIMITS BUT FURTHER ADJUSTMENTS COULD BE CARRIED OUT. OVER THE 7 ACFT RUNS, THE ACFT WAS NOTICEABLE ROUGHER. TSDR ALGA070711687ALMount · corrodedTRANSMISSION DECK, TRANSMISSION PYLON MOUNT POINT CORRISION, RT FWDSDR ALGA070611687ALMount · corrodedTRANSMISSION DECK. TRANSMISSION PYLON MOUNT POINT CORRODED.SDR P4YA2010071500001Mount · crackedLT FWD TRANSMISSION MOUNT FITTING WAS FOUND TO BE CRACKED 2" AT STA 243. AREA WAS PREVIOUSLY REPAIRED AND DOUBLERS WERE REMOVED FOR INSPECTION. REPAIR IS IN PROGRESS AT THIS TIME.
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