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 ALGA20122281205Sleeve · corrodedTRANSMISSION SLEEVE CORRODED BEYOND LIMITS.SDR ALGA20122281204Case · corrodedTRANSMISSION CASE CORRODED BEYOND LIMITS.SDR ALGA20122281203Cover · corrodedTRANSMISSION CORRODED BEYOND LIMITS.SDR ALGA20122281202Case · corrodedCORRODED BEYOND LIMITS.SDR CA120217001Link · unserviceable(CAN) DURING CRUISE AT 100 KIAS AT 6500` ASL, ACFT VIOLENTLY PITCHED DOWN 20 DEGREES FROM LEVEL WITH SIGNIFICANT VIBRATIONS. COLLECTIVE WAS LOWERED AS CONTROL OF THE ACFT WAS REGAINED. WHILE TURNING TO RETURN TO BASE THERE WAS AN APPARENT 1:1 VERTICAL AS WESDR QMLD201202090961Gear · spalledTHE FACE OF THE GEAR TOOTH IS WORN BEYOND LIMITS DUE TO SPALLING. NOTE: MFG DOES NOT COUNT CYCLES BUT PUT 1 IN THE TOTAL CYCLES SO THE SDR SYS WOULD TAKE IT.SDR QMLA2012012812011Transmission · making metalWHILE ENROUTE, M/R TRANSMISION CHIP LIGHT ILLUMINATED. DIVERTED TO CLOSEST AIRPORT. PERFORM THE PRECAUTIONARY LANDING IN AN UNOCCUPIED SCHOOL YARD. INSPECTED CHIP PLUG AND DETERMINED THAT THE DEBIS WAS "CLASS A" IAW ASB EC135-63-12, REV 5. EXAMINED OIL FSDR CA120229002Seal · leaking(CAN) DURING 24 MONTH INSPECTION THE MAIN ROTOR TRANSMISSION WAS FOUND TO HAVE AN INPUT SEAL LEAK. TRANSMISSION REPLACED.SDR CA120120006Nut · worn(CAN) DURING O/H OF THE MAIN TRANSMISSION ASSY DUE TO A CHIP LIGHT IN THE COCKPIT, IT WAS FOUND THAT 3 OF THE NUTS, PN 204-040-131-001 RETAINING BEARING RACE, PN 204-040-130-005 HAD 0 FT/LBS OF TORQUE. THE OTHER 2 NUTS HAD TORQUES OF 25 FT/LBS. OEM TORQUE SPSDR CA120119012Ring Gear · cracked(CAN) CRACKS FOUND ON RING GEAR TEETH AFTER TRANSMISSION WAS DISASSEMBLED FOR CRACKED SUPPORT CASE LUG. RING GEAR SENT FOR NDI. INSPECTOR STATES THAT CRACKS WOULD NOT SHOW UP WITH MAGNAFLUX UNDER ANY CIRCUMSTANCE. CRACKS SHOWED UP READILY WITH LIQUID PENETRSDR ALGA2012011631712Plate · corrodedPLATE HAS PITTING CORROSION BEYOND REPAIRABLE LIMITS.SDR ALGA2012011621712Liner · corrodedLINER HAS PITTING CORROSION BEYOND REPAIRABLE LIMITS.SDR ALGA2012011600712Mast · corrodedMAST HAS PITTING CORROSION ON UPPER SPLINES BEYOND REPAIRABLE LIMITS.SDR CA120220004Gearbox · making metal(CAN) NR 1 INPUT CHIP LIGHT MGB SERVICEABILITY CHECK CARRIED OUT IAW MFG AMM INSTRUCTION. ACFT RETURNED TO SERVICE.SDR CA120105011Lug · cracked(CAN) FOUND LT AFT LUG CRACKED ON TRANSMISSION SUPPORT CASE. CRACK FOUND WHEN TRANSMISSION WAS REMOVED FOR NON-RELATED AIRFRAME MAINTENANCE. THIS IS THE THIRD SIMILAR CRACKED CASE WE HAVE OBSERVED.SDR CA111228004Transmission · making metal(CAN) TRANSMISSION CHIP LIGHT ILLUMINATED DURING ENGINE SHUTDOWN AFTER FLIGHT BACK AT BASE. AFTER INSPECTION, AME FOUND METAL CHIP ON THE NR 1 CHIP DETECTOR. TRANSMISSION REMOVED FOR REPAIR.SDR QMLA2011120111115Transmission · making metalTHE MECHANIC FOUND DURING A ROUTINE INSPECTION, A LARGE AMOUNT OF METAL ON THE TRANSMISSION CHIP DETECTOR. THE ACFT WAS PULLED FROM SERVICE. THERE HAVE BEEN MULTIPLE CHIP EVENTS FOR THIS TRANSMISSION LEADING UP TO THIS CURRENT EVENT. THIS ACFT IS CURRENTLSDR CA111104008Fitting · cracked(CAN) CRACK FOUND IN BASE OF FITTING. APPEARS TO HAVE BEEN CRACKED AT MFG AS THE BELL HELICOPTER INSPECTORS MARK ENGRAVED IN THE PART HAS DISPLACED METAL INTO THE CRACK.SDR CA111101003Relief Valve · stuck(CAN) TRANSMISSION THERMAL RELIEF VLV PN 205-060-512-003, FOUND STUCK OPEN & WORN DURING 3000 HR INSPECTION OF BELL 412CF. VLV WAS REMOVED TO REPLACE GASKET & UPON VISUAL INSPECTION OF VLV ASSEMBLY, POPPET APPEARED LOOSE IN HOUSING. THE VLV WAS DISASSEMBLED SDR CHIR2011100300001Bearing · spalledTHE TRANSMISSION SHOP WAS INSPECTING THE AFT TRANSMISSION THAT WAS IN FOR REPAIR. THE MECHANIC FOUND THE INNER RACE OF THE BEARING SPALLED BADLY. THERE WERE NO OTHER INDICATIONS OF ANY OTHER PROBLEMS WITH THE BEARING DUE TO BEING INSTALLED IMPROPERLY.SDR 2011FA0000628Drive Gear · crackedDURING MAGNETIC PARTICLE INSPECTION, A CRACK WAS FOUND ON THE GEAR.SDR CA110923008Gear · broken(CAN) ACFT MAIN ROTOR TRANSMISSION LOW OIL PRESSURE LIGHT ILLUMINATED IN FLIGHT & PILOT PERFORMED AN UNSCHEDULED LANDING. UPON INSPECTION BY A MECHANIC METAL WAS FOUND ON THE M/R TRANSMISSION CHIP PLUGS. CHIP LIGHT DID NOT ILLUMINATE. TRANSMISSION, PN 369D2SDR 2011FA0000672Lockwasher · misinstalledINCORRECT APPLICATION OF LOCKING WASHERS ON ROTOR SHAFT NUT RETAINER LOCK (117-12118-01). INCORRECT APPLICATION OCCURRED DURING INSTALLATION OF REPLACEMENT ROTOR SHAFT. DISCOVERED WHILE PERFORMING MAIN GEARBOX LOWER CASING REPAIR. (REMOVAL OF ROTOR SHAFT RESDR QMLA2011081311086Gearbox · making metalENROUTE, CHIP LIGHT CAME ON AND A SECOND OR 2 LATER ALOUD GRINDING NOISE WAS HEARD. NR 2 ENG SPOOLED BACK WITH ASSOCIATED LIGHTS. REDUCED POWER & AIRSPEED & FOUND A SUITABLE FIELD AND PREFORMED A RUN ON LANDING WITH NO DAMAGE TO THE ACFT. FOUND BOTH MAINSDR CA110810011Bearing · spalledM/R TRANSMISSION CHIP LIGHT ILLUMINATED DURING FLIGHT. EVIDENCE OF METAL FOUND ON CHIP PLUGS. DURING TRANSMISSION DISASSEMBLY, REASON FOR METAL GENERATION WAS FOUND TO BE T/R O/P PINION ROLLER BEARING INNER RACE WHICH WAS CRACKED AND BADLY SPALLED.SDR CA110808006Bearing · failedTHE TRANSMISSION HAS BEEN INSPECTED FOR "MAKING METAL", UPON FURTHER INSP THE BEARING, PN 206-040-038-101 SN MB 4790, WAS DEEMED TO BE THE SOURCE. THE BEARING WAS INSTALLED CORRECTLY AS INDICATED, HOWEVER THE BEARING ITSELF WAS ASSEMBLED INCORRECTLY WITH THE ISDR CA110803029Fitting · crackedLIFT LINK FITTING AFT LUG FOUND CRACKED BY MECHANIC DURING DAILY INSP. CAUSE WAS FOUND TO BE WRONG P/N BOLT INSTALLED. TB 212-91-132 HAD BEEN COMPLETED WHICH INCORPORATES IMPROVED LIFT LINK FITTING P/N 212-030-154-101 THAT REQUIRES LARGER DIAMETER BOLT P/N 41SDR 2011FA0000518Pinion Gear · failedGEARBOX WAS O/H AS PART OF AN AIRFRAME REFURBISHMENT PROJECT. THE INPUT QUILL SEAL HAD DEVELOPED AN OIL LEAK AND UPON INVESTIGATION IT WAS FOUND THAT THE INPUT SEAL HAD WORN UNEVEN AND THE MALE COUPLING HAD BECOME UNSERVICEABLE DUE TO A GROOVE WORN BY THE SEASDR LCFA20110709001Spindle · brokenTHE TRANSMISSION WAS LIFTED TO FACILITATE CHANGING THE LT TRANSMISSION STOP FITTING. IT WAS NOTICED THAT THE LT NODAL BEAM WAS FREE TO ROTATE ON THE TRANSMISSION SPINDLE. IT WAS DISCOVERED THAT IT WAS NOT THE ELASTOMERIC, BUT THAT THE SPINDLE ASSY HAD CRACKSDR CA110615011Bearing · looseDRAG PIN BEARING CAME LOOSE IN THE SLEEVE.SDR 2011FA0000385Cover · crackedWITHIN 1 WEEK OF RECEIVING THIS UNIT BACK FROM O/H, IT STARTED SEEPING OIL. THOUGHT IT WAS LEAKING FROM THE SCAV PUMP, REMOVED THE PUMP AND INSTALLED NEW PACKINGS. UNIT STARTED TO SEEP OIL AGAIN SHORTLY AFTER REPAIR. CHECKED PACKINGS ON SCAV PUMP AGAIN & FOSDR QMLA2011060711066Transmission · making metalTRANSMISSION CHIP LIGHT ILLUMINATED IN FLIGHT, THIS WAS THE 4TH CHIP LIGHT EVENT WITHIN THE PREVIOUS SEVERAL MONTHS. PREVIOUS CHIP EVENTS WERE FUZZ REQUIRING NO FURTHER ACTION, CHIP EVENT ON 6/07/11 REQUIRED TRANSMISSION CHANGE IAW AMM 63-41-00 6-2. TRANSMISSSDR RMXA2415Transmission · making metalTRANSMISSION CHIP LIGHT ILLUMINATED DURING FLIGHT. FOUND 2 METAL CHIPS ON LOWER DETECTOR. ALSO, REMOVED FILTER AND OPENED. FOUND METAL INSIDE FILTER. REMOVED TRANSMISSION AND SENT TO APPROVED REPAIR STATION FOR REPAIR.SDR CA110517004Yoke · wornMAIN ROTOR GEARBOX YOKE FOUND LOOSE ON 100HR INSPECTION. FLEX PLATE WAS REMOVED TO REVEAL NUT AND COTTER PIN INTACT. WASHER UNDER NUT HAD A STEP WORN IN IT. BACK OF NUT WAS FOUND TO HAVE WEAR. YOKE HAS VISIBLE STEPS WORN IN IT. ADVISED RHC. THEY REQUESTED SDR RMXA20110505001Chip Detector · false activationTRASMISSION CHIP LIGHT ILLUMINATED DURING FLIGHT. TECH CHECKED AND CLEANED TRANSMISSION CHIP PLUG. DRAINED AND SERVICED TRANSMISSION OIL AND CHANGED FILTER. PERFORMED 1 HOUR GROUND RUN. DRAINED OIL AND FOUND NO METAL PARTICALS. SERVICED OIL AND GROUND RUN. ACSDR CA110427014Case · broken(CAN) TOPCASE FOUND WITH EXCESSIVE AMOUNT OF BROKEN TEETH.SDR CA080813010Line · bent(CAN) TRANSMISSION OIL COOLER SOLID LINES WERE BENT TO FIT AT DRAIN VALVE ENDS AND WERE INSTALLED OPPOSITE TO THEIR RESPECTIVE DRAIN VALVE TEES. BOTH LINES WERE REPLACED AND RE-ROUTED CORRECTLY.SDR CA110228003Bearing · brinelled(CAN) DURING A GENERAL FUNCTION CHECK OF THE INPUT MODULE, FOUND THAT THE IFWU WHEN ROTATED WAS ROUGH AND JUMPY WHILE FREEWHEELING, DISASSEMBLY AND FURTHER INSPECTION WAS REQUIRED. UPON FURTHER INSPECTION OF THE IFWU BEARING SB1137-101 IT WAS FOUND TO HAVE FSDR RMXA20110217001Transmission · making metalWHILE DRAINING OIL FROM MAIN TRANSMISSION TO REPLACE THE FREEWHEELING UNIT FOR OVERHAUL,A METALLIC PIECE WAS FOUND AT THE DRAIN PORT. PREVIOUSLY THIS TRANSMISSION HAD CHIP LIGHTS AND THE SERVICEABILITY CHECKS REQUIRED BY THE MANUFACTURES MAINTENANCE MANUAL WESDR CA110214012Support Case · crackedMAIN TRANSMISSION SUPPORT CASE FOUND CRACKED ON DAILY INSPECTINO. AME NOTICED OIL WEEPING FROM AREA AROUND LIFT LINK FITTING. TRANSMISSION REMOVED FOR INSPECTION AND REPAIR.SDR CA110211001Shaft · wornENGINEERS HAD GREAT DIFFICULTY IN REMOVING THE TTO SHAFT TO REPLACE A LEAKING SEAL. ONCE THE SHAFT WAS REMOVED SCORING AND FRETTING WEAR WAS EVIDENT. ENGINEERING WAS CONTACTED. THEY REQUESTED MEASUREMENTS BE TAKEN ACROSS 2 PINS PLACED IN THE SPLINES 180 DEGRSDR AC2A649010711Gearbox · making metalON OUR INBOUND LEG ABOUT 10 MINS OUT OF LANDING, TRANSMISSION CHIP LIGHT ILLUMINATED. FOLLOWING THE EMERGENCY CHECKLIST, SLOWED DOWN AND PULLED THE MGB CHIP DET CB, RESET IT AND THE LIGHT STAYED ON. THERE WAS NO RISE OR FALL IN OIL PRESSURE. LANDED AS SOON AS SDR ALGA123010AFS1227Pinion Gear · crackedNUMEROUS CRACKS ON INNER SURFACE WHERE ROLLER SET RIDES.SDR CA120907005Pinion Gear · cracked(CAN) CRACKS IN THE PINION GEAR WERE FOUND BY NDT DURING THE O/H OF THE MAIN TRANSMISSION. ASB 407-12-98 WAS RELEASED TO REQUIRE A 1-TIME INSPECTION OF THE PINION GEAR.SDR 2011F00004Transmission · making metalPILOT EXPERIENCED A MAIN ROTOR TRANSMISSION CHIP LIGHT DURING TAKEOFF. THE PILOT RETURNED TO LANDING WITH NO INCIDENT. MECHANICS VERIFIED CHIP LIGHT AND FOUND ONE .1250 INCH SLIVER ON THE LOWER PLUG AND A .0625 INCH SLIVER ON THE UPPER PLUG. WHEN DRAINING THE SDR 2011F00003Transmission · making metalPILOT EXPERIENCED A MAIN ROTOR TRANSMISSION CHIP LIGHT DURING TAKEOFF. THE PILOT RETURNED TO LANDING WITH NO INCIDENT. MECHANICS VERIFIED CHIP LIGHT AND FOUND ONE .1250 INCH SLIVER ON THE LOWER PLUG AND A .0625 INCH SLIVER ON THE UPPER PLUG. WHEN DRAINING THESDR E3MA20101227001Sleeve · missingMAIN TRANSMISSION RECEIVED FROM MANUFACTURER (0 TSO). OPERATOR FOUND TWO BOLTS SAFETIED WITH ZERO TORQUE ON SWASH PLATE BALANCE WEIGHT. TORQUE RECOMMENDED 35.4 - 53.1 INCH POUNDS AS PER REM. BOTH OIL COOLER BLOWER FAN RETENTION NUTS FOUND SAFETIED WITH ZERO SDR CA110105003Seal · leaking(CAN) MAIN ROTOR TRANSMISSION INPUT SEALS LEAK. WITHIN LIMITS BUT OIL LEAKING CAUSES PREMATURE LIFE OF ELASTOMERIC COMPONENTS. THIS LEAK IS MOST COMMON WHEN CHANGING FROM WINTER OIL TO SUMMER OIL. AS WELL AS SUMMER OIL TO WINTER OIL.SDR CA101222006Monitor · misinstalled(CAN) IN-FLIGHT THE MASTER CAUTION THE TRANSMISSION OIL PRESSURE LIGHT ILLUMINATED AND THE TRANSMISSION OIL PRESSURE WAS RAPIDLY FALLING. THE ACFT WAS LANDED IMMEDIATELY IN A SAFE ZONE. UPON LANDING, OIL WAS CONFIRMED LEAKING FROM THE TRANSMISSION. TRANSMISSDR AC2A20101218001Warning Light · illuminatedMAIN TRANSMISSION CHIP LIGHT ILLUMINATED INBOUND TO VENICE. NO SECONDARY INDICATIONS NOTED.
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