JASC 6320
Service difficulty reports · 1,930
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 CA051121003Bearing Cage · damagedBEARING CAGE SHAKE TEST EXCEEDED THE ALLOWABLE TOLERANCE OF 0.025" THE AVERAGE RECORDED ON THIS BEARING WAS 0.051". THE BEARING WAS RETURNED TO THE OEM AND A REPLACEMENT RECEIVED. NO CAUSE AND ANALYSIS HAS BEEN PROVIDED. A FOLLOW UP E MAIL WAS SENT 10-NOV-0SDR KBM2005F00212Switch · inoperativeMAIN ROTOR TRANSMISSION OIL TEMP LIGHT ILLUMINATING AT 85 DEGREES C. REMOVED AND REPLACED. (K)SDR CA050530001Gearbox · making metalENGINE CHIP LIGHT, ENGINE REPLACED MO5 SENT FOR REPAIR, TRIPLEX WAS FOUND TO BE THE CAUSE OF THE METAL CONTAMINATION.SDR KBM2005F00209Bearing · rotatedLAMINATED BEARINGS ARE ROTATING, REMOVED AND REPLACED. (K)SDR CA050414002Gear · brokenMAIN ROTOR TRANSIMISSION SENT IN FOR REPAIR DUE TO REPORTED CHIPS ON DETECTOR. TRANSIMISSION OPENED AND APPROXIMATELY 2/3 OF TOOTH (CENTER PORTION) FOUND MISSING FROM INPUT GEAR. PIECE LOCATED INSIDE TRANSIMISSION CASE. NO FURTHER DAMAGE NOTED.SDR CA050414003Gear · brokenMAIN ROTOR TRANSMISSION SENT IN FOR REPAIR DUE TO REPORTED CHIPS ON DETECTOR. TRANSMISSION OPENED AND APPR NR 2/3 OF TOOTH (CENTER PORTION) FOUND MISSING FROM INPUT GEAR. PIECE LOCATED INSIDE TRANSMISSION CASE. NO FURTHER DAMAGE NOTED.SDR ALG2005F00018Transmission · making metalON TAKEOFF, TRANSMISSION CHIP LIGHT ILLUMINATED, PILOT RETURNED TO THE PLATFORM. SHUTDOWN AND NOTIFIED MAINTENANCE. REMOVED UPPER CHIP PLUG AND FOUND 3 SMALL SLIVERS. CLEANED THE PLUG, REINSTALLED CHIP PLUG AND PERFORMED A 30 MINUTE PENALTY RUN AND LEAK CHESDR CA050321005Magnetic Seal · leaking(CAN) DURING CRUISE FLIGHT, FLUID WAS SEEN ON THE WINDOW BY THE LT REAR PASSENGER. THE PILOT REPORTED THE AIRCRAFT LOCATION TO OUR RADIO OPERATOR AND LANDED TO SEE WHERE THE FLUID WAS COMING FROM. UPON INSPECTION, IT APPEARED THAT THE OIL WAS COMING FROM THE RSDR HCM2006F00004Gearbox · making metalWHILE ON A SIGHTSEEING FLIGHT ON THE ISLAND OF HAWAII, THE PILOT EXPERIENCED A MAIN ROTOR GEARBOX CHIP INDICATION. A PRECAUTIONARY LANDING WAS MADE AT THE WAIMEA KOHALA AIRPORT AT APPROX 11:30 AM. INVESTIGATION BY THE MECHANIC FOUND SMALL SLIVERS OF METAL. SDR ALGA100793Drive Gear · failedTRANSMISSION DISASSEMBLED FOR METAL, FOUND DUPLEX BEARING BREAKING DOWN. REMOVED AND REPLACED DUPLEX BEARING P/N 205-040-245-001.SDR CA050530003Support · unserviceable(CAN) M/R GB TEARDOWN REVEALED HEAVY FRETTING & ELONGATED BOLT HOLES ON LOWER SURFACE OF RING GEAR & UPPER MATING SURFACE OF BEARING SUPPORT. HEAVY FRETTING TO LOWER HOUSING & STUD DAMAGE. DAMAGED BACKLASH SHIM. WEAR & DAMAGE IS CONSISTENT WITH LACK OF TORQUE SDR 2005FA0000490Gear Set · corrodedGEAR SET HAS EXCESSIVE FROSTING AND PITTING. REQUESTING WARRANTY CONSIDERATION. (K)SDR ALGA100035Gearbox · making metalFOUND METAL ON BOTH CHIP PLUGS. FOUND MAIN CAUSE TO BE PINION GEAR / REPAIRED G/BOX, REPLACED PINION GEAR,TORQUE METER GEAR,PTO GEARSHAFT.SDR 2005FA0000817Thrust Washer · wornMAIN GEAR BOX, SN A6051 REMOVED FOR BRASS CONTAMINATION. UPON DISASSEMBLY DISCOVERED BRASS MATERIAL WAS FROM SECOND STAGE PLANETARY THRUST WASHERS. 34 OUT OF 36 THRUST WASHERS WORN ON ID BEYOND MAX SERVICEABLE LIMITS. 18 EA BEARINGS HAD SHARP EDGES INNER RACSDR SSHA099270Hose · failedPILOT MADE A PRECAUTIONARY LANDING DUE TO ILLUMINATION OF THE MGB PRESSURE LIGHT, INSPECTION REVEALED THE MGB OIL COOLER LINE HAD BURST AT THE JOINT BETWEEN THE HOSE AND THE METAL CRIMPEND END. THE HOSE WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.SDR CA050318001Spline · damaged(CAN) VIBRATIONS AND A NOISE WAS DETECTED BY AN ENGINEER DURING SHUT DOWN. FURTHER INVESTIGATION REVEALED THE INPUT YOKE RETAINING NUT WAS LOOSE. THIS IN TURN DAMAGED THE INPUT SPLINES BEYOND LIMITS AND THE GEAR BOX WAS REPLACED. THE INPUT SEAL P /N C996-3 HADSDR AC2A099722Belt · failedBELT WAS UNSERVICABLE AFTER 152.3 HOURS OF FLIGHT TIME SINCE NEW. REPLACED BELT WITH NEW PART.SDR 2005FA0000027Cage · brokenBEVEL REDUCTION MODULE P/N 350A32-0300-05 S/N M1899 WAS REMOVED AT TSO: 2367.5 FOR METAL CONTAMINATION. UPON TEARDOWN ANALYSIS IT WAS DISCOVERED THAT THE BEARING CAGE FOR BEARING P/N 704A33-652-036 TSN: 2367.5, WAS BROKEN. SUBSEQUENT DETERIORATION OF BEARINGSDR 2005FA0000420Shaft · wornDURING 600 HOUR INSPECTION GREASE IN LOWER PULLEY SHAFT HAD A RUSTY (BROWN) COLOR (NOTE: ANDEROL GREASE IS BLACK). UPON INSPECTION PART HAS 600.0 HOURS SINCE NEW, THE SPLINES SHOWED IRREGULAR WEAR. SPECULATION OF MFG AND OUR FACILITY IS THAT THE GREASE WAS CSDR CA050107004Housing · leaking(CAN) DURING A TEST FLIGHT FOLLOWING AN OPS NR4 INSPECTION, THE TRANSMISSION OIL PRESSURE LIGHT ILLUMINATED AND THE OIL PRESSURE DROPPED SLIGHTLY BELOW THE RED LINE. AN IMMEDIATE DECENT WAS CONDUCTED AND UPON LANDING A MAJOR OIL LEAK WAS DISCOVERED. THE SOURCSDR CA041207004Spline · worn(CAN) THE TRANSMISSION WAS IN FOR A HARD LANDING SUDDEN STOPPAGE INSPECTION AND EXCESSIVE WEAR WAS FOUND ON THE INTERNAL SPLINES OF THE GEARSHAFT AS WELL AS ON THE EXTERNAL SPLINES OF THE SUNGEAR.THE WEAR WAS NOT A RESULT OF THE HARD LANDING.THIS IS THE SECONDSDR JYDRMDR04069Housing · crackedMGB WAS REMOVED FOR MAIN SHAFT REPLACEMENT AND OVERHAUL. AFTER DISASSEMBLY OF GEAR BOX, THE UPPER HOUSING WAS LOCALLY BLENDED, ETCHED UNDER THE INPUTS AND INSPECTED BY FPI. THE HOUSING WAS REJECTED FOR CRACKS ON THE LT AND RT SIDE. POOR REWELD QUALITY OF CASDR 2005FA0000000Bevel Gear · crackedDURING NDT INSPECTION, GEAR WAS MPI`D AND REJECTED FOR CRACKS. LOCATION OF CRACKS WERE IN ATTACHMENT FLANGE BOLT HOLES (18 EACH). EVERY HOLE HAS APPROXIMATELY .1250 INCH LONG CRACK STARTING ON THE GEAR TO SHAFT ATTACHMENT SIDE EXTENDING DOWN INTO THE HOLE. SDR ALG2005F00005Manifold · damagedAFTER LANDING AT SS69 PASSENGER INFORMED THE PILOT THERE WAS OIL ALL ALONG THE SIDE OF THE AIRCRAFT. SHUTDOWN AND CHECKED THE TRANSMISSION OIL LEVEL AND THE SIGHT GLASS WAS EMPTY. MAINTENANCE REMOVED AND REPLACED THE MAIN TRANSMISSION EXTERNAL OIL FILTER MANSDR CA041119005Bevel Gear · failed(CAN) DURING CLIMB OUT THE MAIN GEARBOX CHIP LIGHT ILLUMINATED. AIRCRAFT RETURNED TO SEVICE LANDING.ON INSPECTION, METAL PARTICLES WERE DISCOVERED ON THE CHIP PLUG AND IN THE COARSE SCREEN. THE MGB WAS REMOVED FROM SERVICE. AT DISASSEMBLY ONE TOOTH WAS FOUND MSDR ALGA098163Pitch Link · bindingBINDING AND AXIAL PLAY BEYOND MAX. REPLACED W/NEW BY FIELD MAINTENANCE.SDR 2005FA0000160Ring Gear · damagedRING GEAR DAMAGED.SDR CA041027001Drag Pin · wornAFT CAST SURFACE OF DRAG PIN ASSY THAT IS PART OF M/R GEARBOX CONTACTED YOKE OF ISOLATION MOUNT. CONTACT DUE TO EXCESSIVE CASTING MATERIAL AFT OF BEARING BORE. COMPONENT SHOP RECEIVED AN ISOLATION MOUNT FOR REPAIR THAT HAD FRETTING/CONTACT MARKS ON YOKE. MARKSDR CA041026011Transmission · corroded(CAN) SEVERE CORROSION FOUND IN OIL GALLERY BEHIND M/R XMSN UPPER BEARING LINER FOR 369D25149 AND 369D25148 BEARINGS. PROBLEM INITIALLY INDICATED BY LACK OF FLOW FROM OIL ORFICES. CORROSION FOUND BY REWORK FACILITY DURING LINER REMOVAL, AND WAS UNDETECTABLE SDR JYDRMDR04066Bearing · crackedTHE AIRCRAFT CREW REPORTED, AFTER PULLING MAX POWER, THAT THE AC JUMPED. AFTER RETURNING TO THE LANDING, THE MECHANICS CHECKED THE CHIP DETECTOR IN THE MAIN GEAR BOX AND FOUND FERROUS METAL. UPON TEARDOWN OF THE GEARBOX IN THE SHOP, DISCOVERED THAT THE INNERSDR CA041019001Bolt · loose(CAN) THE AIRCRAFT WAS OPERATING AWAY FROM BASE WITHOUT A MAINTENANCE CREW ABOARD. THE FOLLOWING OCCURRENCE WAS REPORTED UPON RETURN TO BASE.AFTER THE LAST FLIGHT OF THE DAY THE PILOT NOTICED A TRANSMISSION OIL LEAK ON THE RIGHT SIDE DRAIN AT THE CROSS TUBE. ISDR ERAA098191Transmission · making metalTRANSMISSION MAKING METAL. LT PINION BREAKING DOWN, SPACER MECHANICAL DAMAGED RT PINION BREAKING DOWN, INT SHAFT ROLLER BEARING MECH DAMAGED ON INNER RACE, LT BEVEL GEAR, BREAKING DOWN. INT SHAFT BALL BEARING SCORED, ROTOR MAS BUSHING LINER DAMAGED, 5 EAQ PLSDR ALG2004F00050Transmission · making metalWHILE HOVERING TO REPOSITION FOR TAKEOFF MAIN GEAR BOX CHIP LIGHT ILLUMINATED. RETURNED TO PARKING, NOTIFIED CUSTOMER, BASE MANAGER AND MAINTENANCE. MAINTENANCE REMOVED BOTH CHIP PLUGS TO FIND 2 SMALL HAIR LIKE SLIVERS IN CHIP PLUG SCREEN, FOUND TO BE WITHINSDR KBM2004F00232Drag Pin · crackedSPIKE MOUNT CRACKED JUST FORWARD OF DOG LEG RADIUS. CAUSE UNKNOWN, SENT FOR EVALUATION. INSTALLED SERVICEABLE SPIKE MOUNT.SDR CA041109006Drag Pin · unserviceable(CAN) DURING INSPECTION THE DRAG LINK BEARING WAS FOUND SMOKING. THIS A NEW STYLE IN WHICH BEARING AND NOT WHOLE ASSEMBLY IS REPLACED. NEW BEARING INSTALLEDNOTE: THIS STYLE OF BEARING WAS INTRODUCED THROUGHT B206-00-173 TO ELIMINATE THE PROBLEM WITH THE STAKINSDR HXS2004F00004Bearing · making metalPILOT REPORTED MGB CHIP LIGHT. INVESTIGATION REVEALED METALIC CHIPS ON THE BEVEL REDUCTION GEAR BOX THAT EXCEEDED SERVICABILITY STANDARDS. REMOVED GEARBOX AND FOUND EPICYCLIC HAS A BAD BEARING WHICH IS THE SOURCE OF THE METAL. SENT EPICYCLIC AND BEVEL GEAR SDR ERAA097523Oil Cooler · damagedAIRCRAFT IN MAJOR INSPECTION AND OIL COOLER SENT OFF FOR INSPECTION AND REPAIR. OIL COOLER OVERHAULED.SDR ERAA097106Transmission · leakingLT INPUT SEAL LEAKS. NORMAL WEAR ACTION TAKEN. REMOVED LT FW SHAFT AND SEAL HOUSING. INSTALLED SERVICEABLE HOUSING WITH A NEW SEAL AND O-RING. RE INSTALLED FW SHAFT WITH NEW O-RING ON CAP. ALL WORK DONE IAW REM 103 TT 14439.0 TSO 1995.3.SDR AC2A097166Sun Gear · damagedSUN GEAR WORN BEYOND LIMIT AT 3000 HOUR INSPECTION. METAL TRANSFERRED TO SHAFT. REPLACED SUN GEAR. REQUEST WARRANTY.SDR AC2A097165Shaft · damagedMETAL TRANSFER FROM SUN GEAR. REPLACED SHAFT. REQUEST WARRANTY.SDR CA040820004Transmission · noisy(CAN) DURING LANDING THE HEARD GRINDING NOISE. FURTHER INVESTIGATION REVEALED NOISE WAS COMING FROM MAIN ROTOR TRANSMISSION. TRANSMISSION WAS REPLACED AND NO FURTHER OCCURRENCES AND WILL SUBMIT FURTHER INFORMATION WHEN TEAR DOWN OF TRANSMISSION REPORT BECOMESSDR ALGA098133Bearing · making metalTRANSMISSION DISASSEMBLED FOR METAL, FOUND DUPLEX BRG BREAKING DOWN. REMOVED AND REPLACED BRG.SDR CA040809007Pinion Gear · vibration(CAN) AIRCRAFT HAD 3 PER VIBRATION APPEAR DURING FORWARD FLIGHT. PILOT LANDED AT DESTINATION AND PHONED IN FOR A PRECAUTIONARY MEASURE. COMPANY DISPATCHED ANOTHER AIRCRAFT AND ENGINEER TO ACCESS THE PROBLEM. TRANSMISSION WAS CHANGED AND AIRCRAFT WAS RETURNED SDR ERAA097108Transmission · leakingLEFT INPUT SEAL LEAKS. REMOVED SMALL OIL SEAL AND LEFT PINION ASSY. DISASSEMBLED PINION ASSY, INSTALLED NEW SEAL AND SERVICEABLE FW SHAFT. REASSEMBLED AND REINSTALLED PINION AND OIL JET WITH NEW O-RINGS AND ORIGINAL HARDWARE. ALL WORK DONE IAW 105 REM 103 SDR 2004F00385Cam · failedMAIN GEARBOX S/N A6-168 WAS REMOVED FOR OVERHAUL FROM THE AIRCRAFT. THE 2ND STAGE ASSY WAS DISASSEMBLED AND CAM ASSY WAS REMOVED AND CLEANED FOR NDT INSPECTION. UPON INSPECTION FROM NDT, 2 CRACKS WERE FOUND TO BE LOCATED ON GEAR TOOTH AREA. EACH CRACK APPROSDR 2004F00336Housing · crackedMAIN GEAR BOX S/N A6-168 WAS REMOVED FOR OVERHAUL AND CRACK IN MAIN AFT SIDE OF INPUT FROM THE AIRCRAFT. DURING FPI, THERE WAS A CRACK FOUND IN THE LEFT INPUT BOTTOM SIDE APPROXIMATELY .5 INCH LONG, AND THE RIGHT SIDE WAS FOUND TO ALSO HAVE A CRACK INDICATIONSDR ALGA096400Gear · spalledFOUND SPALLED GEAR TEETH ON GEAR. REPLACED W/NEW PART.SDR ERAA098182Blower · brokenBLOWER SHAFT KEY BROKEN. LOOSE PULLEY ACTION TAKEN: WE HAVE SEEN THIS ON SEVERAL ERA BLOWERS YOU SHOULD POSSIBLY INITIATE AN TORQUE CHECK ON MAIN NUT OF BLOWER.SDR CA041123011Case · broken(CAN) PILOT REPORTED HEARING A LOUD BANG AND THOUGHT PIECES OF THE HELICOPTER FELL FROM THE BELLY. PILOT WAS FLYING VERTICAL REFERENCE WITH A BAMBI BUCKET. UPON IMMEDIATE RETURN TO THE PAD, THE HELL HOLE SIDE INSPECTION PANELS WERE REMOVED AND THE SUPPORT CASDR ALGA096404Bearing · spalledTRANSMISSION DISASSEMBLED FOR METAL CONTAMINATION, FOUND ROLLER BEARING BREAKING DOWN. REMOVED AND REPLACED BEARING.
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