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.

SDR HL01102006001Bearing · failedMAIN GEAR BOX BEGAN MAKING METAL, THIS WAS NONFERROUS METAL, UPON REMOVAL AND DISASSEMBLY IT WAS DISCOVERED THAT THE 1ST STAGE PLANETARY BEARING, P/NSB2410-2 HAD FAILED, BEARING WAS REPLACED AND RETURNED TO SERVICE. FOR FURTHER INFO SEE HEAVY LIFT WORK ORDER Oct 31, 2006 · Skrsky CH54ASDR 2006FA0001135Bearing · cracked(REF NR:MDR06-090) MAIN GEARBOX PN 6435-20400065, SN A6-011 WAS REMOVED DUE TO FINDINGS OF FERROUS METAL IN THE OIL SCREEN AND FILTER. UPON DISASSEMBLY AND TEAR DOWN, THE SOURCE OF THE FERROUS METAL WAS DISCOVERED TO BE COMING FROM GHE SECOND STAGE INPUT ALOct 6, 2006 · N247AC · Skrsky S64ESDR CA061006021Shaft · failed(CAN) EXCESSIVE CORROSION ON SHAFT. (TC NR 20061006021)Oct 4, 2006 · Bell 206LSDR AC2A111017Transmission · making metalAPPROXIMATELY ONE MINUTE AFTER DEPARTING SMI 61C, MAIN TRANSMISSION CHIP LIGHT ILLUMINATED WITHOUT CORRESPONDING MASTER CAUTION LIGHT. POWER WAS REDUCED AND THE APPROPRIATE EMERGENCY PROCEDURE, IAW THE RFM, WAS INTIATED. LIGHT DID NOT EXTINGUISH, RETURNED TO Sep 2, 2006 · N7266K · Skrsky S76ASDR CA061121002Magnetic Seal · leaking(CAN) MAIN ROTOR GEARBOX MAGNETIC SEAL HAS EXCESSIVE LEAKAGE FROM MAIN INPUT SEAL. (TC NR 20061121002)Aug 26, 2006 · Bell 206BSDR ALGR110830Coupling · mismanufacturedON INSPECTION OF FLEX COUPLING, FOUND PART TO BE MISMANUFACTURED ON END FACE SPLINES. REPLACED PART W/SERVICEABLE PART.Aug 18, 2006 · N275AL · Bell 206L4SDR CA060804010Bearing · cracked(CAN) 369D25146 ROLLER BEARING INNER RACE CRACKED, THIS RACE IS PRESSED ONTO TRANSMISSION T/R O/P PINION WITH AN INTERFERENCE FIT. CRACKED INNER RACE CAUSED THE RACE TO SPALL AND CAUSED A CHIP LIGHT. SEVERE METAL CONTAMINATION WAS FOUND (TC NR 20060804010)Jul 31, 2006 · Hughes 369DSDR CA060712007Case · cracked(CAN) THE CRACKED SUPPORT CASE AT THE LIFT LINK FITTING. (TC NR 20060712007)Jul 10, 2006 · Bell 212SDR CA060629006Retaining Nut · broken(CAN) RETAINING NUT FOR THE INPUT FLANGE ON THE TRANSMISSION (MAIN GEARBOX) BROKE IN 2 PIECES CAUSING THE SPLINED ADAPTER TO BACK OFF, WHICH CAUSED THE HYDRAULIC BELT TO RUN ON THE EDGE OF THE PULLEY. (TC NR 20060629006)Jun 27, 2006 · Snias AS350BASDR S9H2006F00000Gearbox · inoperativePILOT NOTICED AN OILY METALLIC ODOR THEN NOTICED ENTIRE TORQUE AND OIL PRESSURE DROPPING. PILOT MADE AN UNEVENTFUL PRECAUTIONARY LANDING AND UPON LOOKING OVER THE AC, NOTICED OIL ON THE AFT FUSELAGE AND ENGINE OIL LEVEL BELOW THE SIGHT GLASS. MAINTENANCE FOUJun 5, 2006 · N350NT · Snias AS350BASDR CA060530001Transmission · making metalDURING CRUISE, MAIN ROTOR TRANSMISSION METAL PARTICLES LIGHT ILLUMINATE IN COCKPIT. LAND IMMEDIATELY IN SMALL CLEARING NEAR A ROAD. IT WAS A SECOND EVENT TO OCCUR WITHIN LAST 10 MINS, BUT FIRST TIME, WARNING LIGHT HAD EXTINGUISHED WHEN PILOT ACTIVATED PULSE May 27, 2006 · Bolkms BO105SSDR CA060524008Spindle · brokenDONT HAVE ANY OTHER INFO AT THIS TIME, AS THIS INCIDENT JUST OCCURRED THIS MORNING. WILL ADD INFORMATION AS IT COMES IN. THIS INCIDENT SEEMS VERY SIMILAR TO ONE 16 OCT 1996 NTSB REPORT NUMBER A96P0231. WITH ONE GOOD DIFFERENCE, NO LOSS IN FLIGHT CONTROL ANDMay 24, 2006 · Bell 214BSDR CA060524001Fitting · crackedAIRCRAFT WAS ON SEISMIC DRILL MOVE JOB. THE ENGINEER WAS DOING HIS DAILY INSPECTION WHEN NOTICED THAT ONE EAR OF THE LIFT LINK FITTING WAS APPEARED CRACKED. A CLOSER VISUAL LOOK CONFIRMED IT WAS CRACKED. INVESTIGATING IF THE BUSHING WAS WRONG FOR THIS INSTMay 19, 2006 · Bell 205A1SDR CA060608011Cover · crackedMAIN GEAR BOX WAS BEING REMOVED FOR INPUT FREEWHEEL REPLACEMENT. A CRACK WAS DETECTED ON THE RT FOOT OF REAR COVER, AS WELL AS A CRACK ON THE RT REAR AIRFRAME FITTING. THE ALIGNMENT FIXTURE WAS USED TO CHECK THE BOX BEAM, AND FOUND TO BE MISALIGNED. THE RTMay 18, 2006 · Skrsky S61LSDR 2006FA0000506Hose · crackedDISCOVERED MAIN TRANSMISSION OIL HOSE FROM OIL COOLER TO MAIN TRANSMISSION LEAKING FROM STEEL BRAIDING. PULLED BACK BRAIDING AND FOUND HOSE TO BE CRACKED. REPLACED LINE WITH NEW. LEAK CHECK OF NEW LINE WAS SATISFACTORY. P/N 900D3409526-105.May 16, 2006 · N902PD · Doug MD900SDR 2006FA0000503Hose · crackedDISCOVERED MAIN TRANSMISSION OIL HOSE FROM OIL COOLER TO MAIN TRANSMISSION LEAKING FROM STEEL BRAIDING. PULLED BACK BRAIDING AND FOUND HOSE TO BE CRACKED. REPLACED LINE WITH NEW. LEAK CHECK OF NEW LINE WAS SATISFACTORY, P/N 900D3409526-105.May 16, 2006 · N902PD · Doug MD900SDR CA060605010Transmission · making metal(CAN) METAL PARTICLES FOUND IN TRANSMISSION INTERNAL FILTER AFTER ROUTINE INSPECTION. NO CHIP LIGHT INDICATION. OIL DRAINED WITH NEW FILTER INSTALLED, AIRCRAFT RUN FOR ONE HOUR ON GROUND WITH METAL PARTICLES FOUND IN INTERNAL AND INLINE FILTER ASSY. NO CHIP May 13, 2006 · Bell 204BSDR HEEA109167Gearbox · overservicedAFTER LEVEL OFF NOTED THAT MAIN GEARBOX OIL PRESSURE WAS STEADY AT 50 PSI WITH OCCASSIONAL DIPS TO 49 PSI. RETURNED TO HOUMA. MAINTENANCE FOUND THE TRANSMISSION TO BE OVERSERVICED. DRAINED THE FLUID LEVEL TO THE PROPER LEVEL. PRESSURE CHECKED GOOD ON CHECMay 10, 2006 · N761P · Skrsky S76CSDR CA060526005Freewheel Unit · damagedLT P/N 61074-35000-061 S/N C144-00286 RT P/N 61074-35000-060 S/N C144-00279 THESE UNITS WERE CHANGED UPON REQUEST OF THE CUSTOMER AFTER A SUSPECTED FREEWHEEL SLIP. SEE ATTACHED REPORT AND DIGITAL PICTURES FOR DETAILS. UNABLE TO ATTACH FILES, WILL E-MAIL THEMMay 9, 2006SDR EGI2006F00000Line · leakingOIL WAS DISCOVERED LEAKING FROM BELLY OF AC AFT OF AFT CROSSTUBE. INVESTIGATION REVEALED THAT TRANSMISSION PRESSURE OIL LINE TO OIL COOLER HAD CHAFED AGAINST OIL COOLER DRAIN LINE CAUSING A HOLE TO BE CHAFED INTO PRESSURE LINE. OIL COOLER DRAIN LINE IS A STAApr 11, 2006 · N413EV · Bell 412EPSDR ALG2006F00028Chip Detector · dirtyUPON TAKEOFF TO HOVER, XMSN CHIP LIGHT ILLUMINATED UPON TAKEOFF TO HOVER. PILOT LANDED AC. MAINTENANCE FOUND LIGHT FUZZ ON LOWER XMSN CHIP PLUG. CLEANED CHIP PLUG, C/W 30 MIN GROUND RUN. NO FURTHER DEFECTS NOTED. (K)Mar 13, 2006 · N627AL · Bell 407SDR 2006FA0000274Hose · crackedHOSE IS INSTALLED ON MD902 HELICOPTERS. MD P/N IS 900D3409526-105. HOSE IS USED FOR MAIN TRANSMISSION OIL COOLING. FOUND LARGE ACCUMULATION OF OIL ON TRANSMISSION DECK AFTER FLIGHT. HOSE WAS FOUND TO BE CRACKED IN ONE OF THE BELLOWS. (CORE OF HOSE IS STAINMar 1, 2006 · N902PD · Doug MD900SDR CA060614004Fitting · cracked(CAN) PILOT REPORTED A FORE-AFT KICK IN THE CYCLIC, AT THE SAME TIME THEY HEARD A NOISE. ON ARRIVAL OF THE AC, INSPECTED THE M/R SYSTEM, SWASHPLATE, SCISSORS AND SLEEVE, TRANSMISSION MOUNTS AND NO DAMAGE WAS FOUND. A/C WAS FLOWN AGAIN AND THE PILOT REPORTED ANFeb 24, 2006 · Bell 212SDR KBM2006F00007Isolation Mount · inoperativeAIRCRAFT HAS VERTICAL VIBE DURING OUTOFF GROUND HOVER, ISOLATION MOUNT REMOVED AND REPLACED. (K)Dec 31, 2005 · N188TV · Bell 206BSDR ALG2006F00003Transmission · making metalDURING TAKEOFF THE TRANSMISSION CHIP LIGHT ILLUMINATED. FOUND 2 FLAKES ON LOWER CHIP PLUG. TRANSMISSION REMOVED FOR METAL. (K)Dec 22, 2005 · N406AL · Bell 407SDR 2006FA0000049Oil Cooler · crackedOIL COOLER, TRANSMISSION SIDE OF COOLER CRACKED AND SPRAYED OIL BELOW ENGINE DECK. (K)Dec 20, 2005 · N318PD · Agusta A119SDR CA051216002Nozzle · damagedTHESE TWO OIL JET ASSEMBLIES WERE RECEIVED NEW AND CHECKED FOR CORRECT ORIENTATION OF THE OIL DELIVERY HOLE. BOTH UNITS FAILED WHEN COMPARED TO A USED ASSEMBLY. THIS OIL JET SPRAYS ON TO THE GEAR MESH OF THE INPUT BEVEL PINION P/N 76351-09132-102 AND BEVEL GEDec 15, 2005 · Skrsky S76ASDR AU510001955Shaft · loose(AUS) LATERAL CYCLIC CONTROL BELLCRANK LOOSE. DISASSEMBLY AND INVESTIGATION OF THE TRANSMISSION FOUND THAT THE BELLCRANK MOUNTING SHAFT ATTACHED TO THE TRANSMISSION HAD NO SPLIT PIN WHICH ALLOWED THE NUT TO WORK LOOSE AND COME OFF THE SHAFT. THE NUT AND WASHERDec 9, 2005 · Hughes 269CSDR CA051208012Bolt · crackedBOLT WAS SENT FOR NDT AS PART OF THE 2200HR AIRCRAFT OVERHAUL. THE CRACK WAS FOUND ON THE MOUNTING TANGS THAT ARE PART OF THE BOLT HEAD. THIS CRACK COULD NOT BE SEEN BY A NORMAL VISUAL INSPECTION. THIS IS NOT THE FIRST TIME THIS BOLT HAS BEEN FOUND CRACKED Dec 5, 2005 · Robsin R44SDR CA051207002Housing · wornPITOT LINE WAS FOUND WEARING INTO TRANSMISSION HOUSING. THE WEAR IS ON THE CURVE OF THE HOUSING. THE COMPANY HAS STARTED AN INSPECTION OF THIS AREA FOR ALL R44II IN THE FLEET.Dec 4, 2005 · Robsin R44RAVENIISDR CA051207001Housing · chafedPITOT LINE WAS FOUND WEARING INTO TRANSMISSION HOUSING. THE WEAR IS ON THE CURVE OF THE HOUSING. THE COMPANY HAS STARTED AN INSPECTION OF THIS AREA FOR ALL R44II IN THE FLEET.Dec 1, 2005 · Robsin R44RAVENIISDR CA051128011Gearbox · wornAIRCRAFT WAS DOWN FOR OTHER MAINTENANCE. WHEN THE FUEL TANK WAS REMOVED THE C729-14 PITOT LINE WAS FOUND WEARING INTO TRANSMISSION HOUSING. THE WEAR IS ON THE CURVE, AND IS APPROX. 0.045" TO 0.050" DEEP. THIS AREA HAD NOT BEEN ACCESSED SINCE THE AIRCRAFT WANov 28, 2005 · Robsin R44RAVENIISDR CA051123005Hose · unserviceableWHILE GROUND RUNNING AIRCRAFT, OIL HOSE BURST AND DRAINED MGB OIL OVERBOARD.Nov 20, 2005 · Skrsky S76ASDR EGRR106996Planetary Gear · unserviceablePREMATURE WEAR OF XMSN PLANETARY SUN GEAR AT LOWER DRIVE SPLINES, WORN HALF THE WAY THRU DRIVE SPLINES .030.Nov 16, 2005 · Clark 1000CLARKSDR CA051101002Sun Gear · mismanufactured(CAN) 412 MAIN TRNASMISSION SUN GEAR 205-040-229-003 MANUFACTURED WITH WRONG TYPE MATERIAL.Oct 29, 2005 · Bell 412EPSDR CA051027008Planetary Gear · mismanufactured(CAN) PLANETARY GEAR FLANKS SURFACE FINISH EXCEED THE ENGINEERING DRAWING REQUIREMENT OF (RMS 8 RA).4 GEARS IAW XMSN IAW 206B.Oct 24, 2005 · Bell 206B1SDR CA051013004Clamp · misinstalled(CAN) DURING GROUND RUN PHASE OF MAIN GB REPLACEMENT, NR 2 GEN VESPAL DRIVE SPLINE ADAPT STRIPPED OUT CAUSING GEN TO FALL OFF LINE. GEN WAS REMOVED FROM ACCY GB, DRIVE SPLINE ADAPTOR WAS REPLACED, GEN WAS REINSTALLED, FUNCTION TESTED. AC WAS RETURNED TO SERVISep 23, 2005 · Skrsky S64ESDR CA051124003Bearing · unserviceableNEW SPHERICAL BEARING RECEIVED WITH EXCESSIVE AXIAL PLAY. AXIAL PLAY OF THE INNER RACE TO OUTER RACE WAS MEASURES AT 0.032" THE BHT-ALL-SPM LIMIT FOR A USED BEARING IS 0.030". THE BEARING HAS BEEN RETURNED TO BHT FOR WARRANTY WITH A BHT MMIR.Sep 20, 2005 · Bell 212SDR ALGA107653Bearing · spalledTRANSMISSION ASSY HAD METAL IN OIL, DISASSEMBLED AND FOUND DUPLEX BEARING BREAKING DOWN. REMOVED AND REPLACED DUPLEX BEARING PN:206-040-032-105.Sep 17, 2005 · N3188P · Bell 206L1SDR ALG2005F00076Transmission · making metalDURING CRUISE FLIGHT, TRANSMISSION CHIP LIGHT ILLUMINATED. PILOT LANDED ASAP AND PERFORMED CHIP PLUG CHECK IAW THE OPS MANUAL PROCEDURE, WHILE IN COMMUNICATION WITH MAINTENANCE. UPON COMPLETION OF 30 MINUTE PENALITY RUN AND LEAK CHECK, AC WAS FLOWN. MAINTENSep 17, 2005 · N3188P · Bell 206L1SDR CA061002008Bearing · spalled(CAN) M/R TRANSMISSION CHIP DETECTOR FOUND TO HAVE A LARGE AMOUNT OF METAL. SOURCE FOUND TO BE THE T/R O/P PINION ROLLER BEARING INNER RACE. THE INNER RACE WAS FOUND TO HAVE HEAVY SPALLING IN A LARGE AREA. (APPROXIMATELY .550 INCH X .200 INCH) (TC NR 200610Sep 15, 2005 · Hughes 369DSDR CA050916004Filter · improper part(CAN) A PHYSICAL DIFFERENCE WAS NOTICED ON FILTERS 50-075-1. A SCREEN HOLE PATTERN WAS FOUND TO BE OUT OF SPECIFICATION. ATTACHED PICTURE SHOWING DIFFERENCES BETWEEN ACCEPTABLE AND NON-CONFORMING PARTS.Sep 14, 2005 · Bell 206L4SDR ALGA105863Bearing · failedTRANSMISSION ASSY MAKING METAL, DISASSEMBLED AND FOUND DUPLEX BEARING BREAKING DOWN. REMOVED AND REPLACED DUPLEX BEARING.Aug 20, 2005 · N175AL · Bell 206L4SDR ALG2005F00063Transmission · failedTRANSMISSION CHIP LIGHT ILLUMINATED IN HOVER. MAINTENANCE REMOVED TRANSMISSION, MAST, AND OIL COOLER. A SERVICEABLE TRANSMISSION, MAST AND OIL COOLER WERE INSTALLED. FLUSHED TRANSMISSION OIL SYSTEM. IAW MM. GROUND AND LEAK CHECK, OK. (K)Aug 19, 2005 · N175AL · Bell 206L4SDR ALGA105522Bearing · making metalTRANSMISSION ASSEMBLY MAKING METAL, DISASSEMBLED AND FOUND DUPLEX BEARING BREAKING DOWN. / REMOVED AND REPLACED DUPLEX BEARING P/N 206-040-032-105Aug 18, 2005 · N351AL · Bell 206L3SDR CA051123001Adapter · wornCOMPLETE LOSS OF MAIN GEARBOX OIL AND OIL PRESSURE AS A RESULT OF MGB OIL FILTER OUTLET FLUID ADAPTER ASSEMBLY SEPARATION FROM HOUSING DURING FLIGHT. CAUSE OF FITTING DISENGAGEMENT UNDER INVESTIGATION. FOR ADDITIONAL DETAILS CONTACT CHC HELICOPTERS INTERNATIAug 10, 2005 · Skrsky S76ASDR CA060329003Case · brokenWHILE IN CRUISE, A LOUD BANG WAS HEARD AND AC SHUDDERED. AC SETTLED OUT AND CREW DIVERTED TO AIRPORT. INSPECTION OF AC REVEALED MAIN TRANSMISSIOM SUPPORT CASE BROKEN AT DRAG LINK ATTACHMENT POINT. AC GROUNDED AND MAIN TRANSMISSION REPLACED. AC RELEASED BACJul 30, 2005 · Bell 212SDR 2005FA0001098Bevel Gear · brokenHELICOPTER RECEIVED 2 TRANSMISSION CHIP CAUTION LIGHTS IN 2.9 HOURS. MAIN INPUT GUILL WAS REMOVED FOR INSPECTION OF THE BEVEL GEAR. THE BEVEL GEAR INSPECTION REVEALED 1 MISSING GEAR TOOTH AND AN ADJACENT TOOTH CRACKED. TRANSMISSION SENT TO MFG FOR EVALUATIOJul 14, 2005 · N701WP · Bell 407SDR 2005FA0001052Transmission · unserviceableDURING ROTATION OF THE M/R HUB WHILE PERFORMING ROUTINE MAINTENANCE A NOTICEABLE (SQUEAK) WAS HEARD COMING FROM THE M/R TRANSMISSION. SUBSEQUENT INVESTIGATION ALLOWED FOR THE DISCOVERY OF THE INPUT PINION HAVING SIDE SLOPE AND THE SQUEAK WAS HEARD WITH A LISTJul 10, 2005 · Hughes 369DSDR CA050621020Bearing · spalledSPALLED BEARING RACE.Jun 18, 2005 · Skrsky S76A
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