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 JYER201407024Bolt · shearedMAIN GEARBOX, NR 2 OIL PUMP FILTER HOUSING RETAINING BOLT SHEARED AT HEAD ALLOWING PRESSURE OIL TO ESCAPE FROM MAIN GEARBOX. PILOTS INITIATED PRECAUTIONARY LANDING IN FIELD ADJACENT TO WATER DIP SITE AND SHUTDOWN WITH NO EVENTS. MAIN GEARBOX WAS REPLACED ANDSDR CA140717010Housing · cracked(CAN) MAIN GEAR BOX LOWER HOUSING CRACKING. HOUSING SENT TO ENGINEERING FOR EVALUATION.SDR K2DA20140701001Pressure Switch · faultyMAIN ROTOR TRANSMISSION LOW OIL PRESS LIGHT ILLUMINATED IN FLIGHT PREFORMED PRECAUTIONARY LANDING. TRANSMISSION OIL PRESS SWITCH INOPERATIVE. REPLACED PRESS SWITCH RAN ENG, OPERATIONS CHECKED GOOD & LEAK CHECKED GOOD, RETURNED TO SERVICE.SDR CA140625005Transmission · making metal(CAN) TRANSMISSION FOUND MAKING METAL ON CHIP PLUG AFTER 219.5 HRS SINCE LAST OVERHAUL.SDR CA140624003Shaft · damaged(CAN) DURING MAIN GEAR BOX O/H, AND SUBSEQUENT INSPECTION OF THRU-SHAFT, RUN-OUT CHECK INDICATED A 0.012" BULGE AT THE FORWARD END. THIS MAY HAVE OCCURRED DURING REMOVAL OF THE END PLUG, IAW THE MANUAL. THIS IS THE SECOND SUCH EVENT IN A SHORT TIME, THE OTHER SDR M3XA2014061205Chip Detector · unlockedAFTER TAKEOFF DURING A PATIENT TRANSFER FLIGHT, THE PILOT ENCOUNTERED A CWP TRANSMISSION PRESS LIGHT ILLUMINATION. IMMEDIATELY PERFORMED AN UNSCHEDULED LANDING. PILOT REPORTED 3 MINUTES OF FLIGHT TIME WITH A 2 MINUTE COOL DOWN FROM THE TIME THE LIGHT ILLUMINSDR CA140522010Bushing · worn(CAN) TORQUE TRANSMISSION RESTRAINT DUE TO EXCESSIVE PLAY. REMOVED LT STOP ASSY DUE TO WORN BUSHINGS. INSTALLED NEW & SERVICEABLE TSI 0.0 PARTS IN COMPLIANCE WITH TB 206L-94-1971.SDR QMLA2014043014048Transmitter · defectiveDURING TAKEOFF FROM LANDING ZONE THE NR 1 SYS MGB OIL PRESS DROPPED TO .4 BAR, BELOW NORMAL RANGE. THERE WERE NO CHIPS DETECTED OR TEMP RISE ASSOCIATED WITH THIS INDICATION. SYS NR 2 PRESS REMAINED WITHIN NORMAL LIMITS. THE FLIGHT WAS ABORTED & CONTINUED TSDR K2DA20140427001Shaft · wornTRANSMISSION OIL PRESS LIGHT DURING FLIGHT. PRECAUTIONARY LANDING PREFORMED. TRANSMISSION OIL PUMP INPUT SHAFT NOT PROPERLY SEATED & WORN. REPLACED INPUT SHAFT PN 10807-2 IAW MD CSP-COM-5 CH 63-20-25. PERFORMED GND RUN & LEAK CHECK. RETURNED TO SERVICE.SDR CA140424014Housing · cracked(CAN) CRACKS WERE FOUND ON QTY 4 OF THE LUGS THAT ATTACH THE TOP HOUSING TO THE MAIN GEAR BOX. THE CRACKS EXTEND FROM OTBD EDGE TO SCREW HOLES THAT ATTACH A REWORK SHIM TO THE LOWER SURFACE OF THE HOUSING. THE REWORK WAS CARRIED OUT IAW RDC P-RH98-126/D, AND SDR QMLA2014041614037Wheel · brokenON START-UP, THE PILOT REPORTED THAT THE NR INDICATION WAS AT 364 INSTEAD OF 394 & WAS FLUCTUATING DOWN TO 351. BOTH THE ANALOG NRS & THE DIGITAL NRS ARC WERE FLUCTUATING & THAT THE NF HAD EVERY OTHER SEGMENT OF THE DIGITAL ARC NOT ILLUMINATED. AFTER TROUBLESSDR DT1R20140206003Gear Shaft · damagedDURING TROUBLESHOOTING AN OIL LEAK FROM THE ECS DRIVE SHAFT . FOUND A 0.006" DEEP CIRCUMFERENTIAL GROOVE ON THE ECS DRIVE SHAFT UNDERNEATH THE LIP SEAL. FOUND MULTIPLE SCORES APPROXIMATELY 0.010" DEEP IN THE AXIAL DIRECTION. THE SHAFT HAS BEEN DEEMED UNSERSDR AC2R2018042005Bearing · corrodedMAIN GEARBOX OIL COOLING FAN HAD A CORRODED BEARING ASSY.SDR AC2R2018042001Bearing · corrodedMAIN GEARBOX OIL COOLING FAN CORRODED. REMOVED THE BEARING ASSY.SDR CA140318008Chip Detector · cracked(CAN) DURING THE O/H OF THE TRANSMISSION IF WAS FOUND THAT THE OIL DRAIN PLUG/CHIP DETECTOR WAS CRACKED AT THE RADIUS OF THE FEMALE HOUSING ITEM NR 36 IN THE IPC.SDR JYER2014031901Stud · shearedDURING FLIGHT, HAD A LOW TRANSMISSION OIL PRESSURE MASTER CAUTION AND CORRESPONDING GAUGE LOW INDICATION, CO-PILOT LOOKED IN THE BACK OF THE AIRCRAFT TO FIND A LARGE AMOUNT OF OIL COVERING THE FLOOR. IMMEDIATELY BEGAN A DECENT OUT OF 3800 FEET MSL TO LAND SDR CA140314016Bolt · mismanufactured(CAN) DURING ASSEMBLY OF A TRANSMISSION AFTER OVERHAUL A NEW BATCH OF BOLTS WAS BEING USED. 1 OF THE BOLTS OUT OF THE BAG WAS FOUND TO HAVE BEEN IMPROPERLY DRILLED DURING MFG. THE BOLT WAS DISCARDED AND ALL OTHER BOLTS IN THAT BATCH INSPECTED WITH NO OTHER DESDR JYDR2014030600439Bearing · spalledMAIN GEAR BOX WAS REMOVED FROM ACFT, DUE TO MAKING METAL AFTER A CHIP LIGHT DURING FLIGHT. DISASSEMBLY OF MGB AT REPAIR STATION REVEALED THAT LT (NR 1) 2ND STAGE INPUT ALIGNMENT BEARING HAD FAILED. THIS BEARING IS NORMALLY NOT A RECURRING PROBLEM.SDR CA140307002Wheel · loose(CAN) DURING POWER APPLICATION, PILOT NOTICED AN ERRATIC READING ON THE MAIN ROTOR RPM GAUGE. ON FINAL APPROACH THE LOW ROTOR WARNING SYS ACTIVATED, ALARM IN HEADSET, HOWEVER, THE ROTOR RPM WHERE CORRECT. INVESTIGATION IN CONJUNCTION WITH MFG REVEALED THAT TSDR CA140222004Hose · leaking(CAN) DURING DAILY INSPECTION, OIL WAS FOUND ON TRANSMISSION DECK, AFTER INVESTIGATION, THE HOSE GOES TO THE MGB FILTER HAS BEEN SUSPECTED TO LEAK. FINALLY AFTER INSPECTION THE HOSE WAS LEAKING AT THE PART WHERE THE HOSE IS CRIMP AT THE UPPER FITTING. HOSE WSDR CA140221024Sleeve · worn(CAN) ON GEAR BOX INSTALLATION, THE FEMALE THREADS GAVE WAY AS LUBE FITTING WAS TIGHTENED. ACFT HAS DEVELOPED AN OPTIONAL REPLACEMENT PART WITH A STEEL INSERT TO PREVENT SUCH OCCURRENCE FROM HAPPENING, REF SB 61B35-50.SDR CA140203025Spider · broken(CAN) PILOT REPORTED TRANSMISSION CHIP LIGHT ILLUMINATED DURING HELI-SKI OPERATIONS AND RETURNED TO LODGE. EXAMINATION OF CHIP PLUG BY AME SHOWED SEVERAL SMALL FLAKES AND 1 SMALL SLIVER. TRANSMISSION WAS REMOVED AND DISSASSEMBLED. SPIDER ASSY WAS FOUND WITH SDR CA140130017Housing · cracked(CAN) CARRIED OUT AN NDT INSPECTION ON THREE SEPARATE MAIN GEAR BOX LOWER HOUSINGS, ALL THREE LOWER HOUSINGS WERE FOUND TO HAVE CRACKS IN SIMILAR LOCATIONS. CRACKS APPEAR TO ORIGINATE IN PRODUCTION RELIEF AREA ADJACENT TO STUD INSERT. BASED ON THE INSPECTORSSDR QMLA2014010614001Gearbox · making metalAFTER STARTUP & WARM UP ON GND, FUEL LEVER MOVED FROM GROUND IDLE TO FLY POSITION. MGB CHIP LIGHT ILLUMINATED, PILOT BEGAN ENG SHUTDOWN. GRINDING NOISE HEARD COMING FROM MGB DURING SHUTDOWN. SUBSEQUENT INSPECTION BY MECHANIC FOUND HEAVY CONTAMINATION OF LOWSDR CA131231007Warning Light · illuminated(CAN) DURING MAINTENANCE HOVER, MAIN TRANSMISSION CHIP SUMP CAS CAUTION ILLUMINATED. NOT BURNABLE.SDR CA131212003Housing · cracked(CAN) OUTPUT HOUSING ASSY, INSTALLED IN MAIN GEARBOX WAS FOUND CRACKED AT OVERHAUL DISASSEMBLY. HOUSING CRACKED FULLY THROUGH, WITH CRACK RUNNING UP OVER FLANGE AND THROUGH A MOUNTING HOLE.SDR 2013FA0000625Case · crackedDURING INVESTIGATION OF AN OIL LEAK, A CRACK WAS FOUND IN THE MAIN TRANSMISSION UPPER LEFT HAND RING GEAR CASE .SDR 2A6R20131105002Actuator · bindingDURING MAINTENANCE GROUND RUN, PILOT INFORMED ONBOARD MECHANIC THAT CYCLIC STICK WAS HARD TO PUSH TO THE RT WHILE PERFORMING FLIGHT CONTROL CHECK. R & R BOTH LATERAL CONTROL SERVO ACTUATORS AND PERFORMED RIG CHECK OF MAIN ROTOR. OPS CHECK FLIGHT WAS SUCCESSFUSDR 2A6R20131105001Actuator · bindingDURING MAINTENANCE GROUND RUN, PILOT INFORMED ONBOARD MECHANIC THAT CYCLIC STICK WAS HARD TO PUSH TO THE RT WHILE PERFORMING FLIGHT CONTROL CHECK. R & R BOTH LATERAL CONTROL SERVO ACTUATORS AND PERFORMED RIG CHECK OF MAIN ROTOR. OPS CHECK FLIGHT WAS SUCCESSFUSDR CA131031008Case · cracked(CAN) AN OIL LEAK HAD DEVELOPED ON THE LT SIDE OF THE UPPER TRANSMISSION DECK. IT WAS OBSERVED THAT THE OIL LEAK WAS ORIGINATING FROM A CRACK IN THE RADII TRANSITION AREA OF THE CASE BETWEEN THE LT MAIN INPUT AND PORTION OF THE LOWER CASE.SDR JYER20140204001Cover · crackedREMOVED FROM MGB. A CRACK WAS DISCOVERED BY FIELD MAINTENANCE ON THE GEARBOX COVER AND THE GEARBOX WAS REMOVED AT ACFT TT: 38,523.7. IT WAS REPAIRED AND RELEASED UNDER CRS W/O 7027. THE TRANSMISSION WAS INSTALLED ON THE SAME AIRCRAFT AT ACFT TT: 38,798.9 ANDSDR CA130922002Washer · failed(CAN) TRANSMISSION MOUNT UPPER WASHER FOUND CRACKED DURING DAILY INSPECTION. 1 CRACK FOUND OF LESS THAN .2500" LENGTH STARTING FROM THE OUTSIDE DIAMETER OF THE WASHER. TRANSMISSION SUPPORT CASE SURFACE INSPECTED FOR DEFECTS, NONE FOUND, AND REPLACEMENT WASHESDR CA130922001Washer · failed(CAN) TRANSMISSION MOUNT UPPER WASHER FOUND CRACKED DURING DAILY INSPECTION. 2 CRACKS FOUND OF LESS THAN .2500" LENGTH STARTING FROM THE OUTSIDE DIAMETER OF THE WASHER. TRANSMISSION SUPPORT CASE SURFACE INSPECTED FOR DEFECTS, NONE FOUND, AND REPLACEMENT WASHSDR ALGA201308017561Bearing · failedTRANSMISSION CHIP PLUG INDICATED METAL WAS BEING MADE. ON TEARDOWN OF TRASMISSION, FOUND THAT THE DUPLEX BEARINGS WERE BREAKING DOWN.SDR YTRA2013073000002Duplex Bearing · spalledMAIN ROTOR TRANSMISSION DUPLEX BEARING, BEARING SET SPALLING.SDR ALGA071220137529Duplex Bearing · galledRECURRING CHIP LIGHT. DISCOVERED DUPLEX BEARING IN TRANSMISSION BREAKING DOWN.SDR CA130627001Quill · broken(CAN) INPUT QUILL IN-FLIGHT FAILURE, FREEWHEEL UNIT FAILURE, INPUT DRIVESHAFT FAILURE, ENGINE OVERSPEED, AUTOROTATIVE LANDING.SDR QMLA2013051913067Pinion · damagedRECEIVED A MGB CHIP LIGHT. ACFT WAS SHUTDOWN AND THE CHIP DETECTOR WAS CHECKED. A LARGE CHIP WAS FOUND, REFERING TO ASB 135-63-012 THE CHIP WAS CLASSIFIED AS " STAGE C". THE NR 2 INPUT GEAR WAS REMOVED AT THIS TIME AND PITTING WAS NOTED ON THE GEAR. THIS MX SDR DT1R20130425003Gear · crackedDURING THE ACCOMPLISHMENT OF AN TECHNICAL BULLETIN BT109EP-128 ON A MAIN GEARBOX; A CROWN GEAR, WAS FOUND TO HAVE A CRACK. THE CROWN GEAR WILL BE REPLACED BY A NEW SUPPORT ASSY.SDR 3GMA20130419003Gearbox · brokenA/C WAS IN CRUISE FLIGHT WHEN THE XMSN CHIP ILLUMINATED ON THE CAD. PILOT WAS 20 MINUTES INTO A 30 MINUTE FLIGHT. FLEW FOR 1-2 MINUTES UNTIL A SUITABLE LANDING AREA WAS FOUND. LANDED AND SHUT DOWN IMMEDIATELY. NO ABNORMAL SOUND WAS NOTED, TRANSMISSION TEMPSDR 2013FA0000708Plate · misinstalledFREEWHEEL ARRIVED TO OUR FACILITY FOR REPAIR DUE TO METAL PARTICLES ON FREEWHEEL AND ON TRANSMISSION OIL FILTER MAGNETIC PLUG. DURING DISASSEMBLY WE FOUND THAT PLATE, PN 206-040-204-001 WAS INSTALLED INCORRECT. AS STATED BHT-206-A/B/L-SERIES CR&O CHAP 63-55,SDR 2013FA0000707Nut · misinstalledTRANSMISSION ARRIVED TO OUR FACILITY FOR REPAIR DUE TO METAL PARTICLES FOUND IN FREEWHEEL AND ON TRANSMISSION OIL FILTER MAGNETIC PLUG. DURING OUR INSPECTION, WE FOUND THAT NUT PN 206-040-045-001 WAS INSTALLED INCORRECT, THE RESULT OF THIS WAS 2 BROKEN TANGSSDR L9QR20130410001Clutch · destroyedDURING A PREFLIGHT INSPECTION, PILOTS NOTICED THE FREEWHEELING UNIT WAS ROUGH WHILE THEY WERE CHECKING FOR ROUGHNESS IAW THE PREFLIGHT CHECK LIST. THEY NOTIFIED OUR MX DEPARTMENT, UPON INSPECTION BY THE MECHANIC WHILE TURNING SHEAVE BACKWARDS HE OBSERVED ROUGSDR CA130321001Restraint · damaged(CAN) UPON INITIAL LIFT OF THE ACFT, A LOUD METALLIC SOUNDING NOISE WAS HEARD, COMING FROM THE LT SIDE. THE ACFT WAS IMMEDIATELY SET BACK ON THE GROUND. UPON INSPECTION THE LT FORE/AFT TRANSMISSION RESTRAINT WAS IDENTIFIED AS DEFECTIVE, DEBONDED.SDR CA130314004Case · cracked(CAN) TOP CASE RT INBD COLLECTIVE IDLER LUG FOUND CRACKED. BUSHING WORN BEYOND LIMIT. CASE REPLACED.SDR L9QR20130410002Yoke · failedONE OF THE MAGNETS CAME LOOSE FROM THE MAIN GEAR BOX YOKE, THERE ARE 2 MAGNETS IN THIS HALL EFFECT MAIN ROTOR RPM SENCING SYS WHEN ONE OF THE MAGNETS CAME SEPARATED FROM THE YOKE YOU LOOSE RPM INDICATION AND THE LOW ROTOR RPM WARNING HORN AND LIGHT THEN ACTIVSDR CA130312010Support · broken(CAN) DURING ROUTINE ACFT DAILY INSPECTION, AME WAS INSPECTING THE MAIN TRANSMISSION AND NOTICED THE SUPPORT CASE WAS CRACKED ON THE LT SIDE BY THE AIRFRAME ATTACHMENT BOLT. THE TRANSMISSION WAS REMOVED AND IT WAS FOUND THE SUPPORT CASE LEG WAS BROKEN WITH THSDR CA130306009Gearbox · corroded(CAN) DURING 50/100 HR INSPECTION OF THE HELICOPTER, THE TAIL ROTOR GEARBOX OUTPUT SHAFT WAS FOUND TO HAVE SOME CORROSION PITTING. MINOR CORROSION ALSO FOUND ON TAIL ROTOR PITCH CHANGE ASSEMBLY, PN: C031-1, SN: 3693. TAIL ROTOR GEARBOX AND PITCH CHANGE REPLASDR CA130305005Shaft · worn(CAN) DURING CERTAIN FLIGHT REGIMES, ACFT EXPERIENCED ABNORMAL VIBRATIONS. UPON DISASSEMBLY OF THE "TIMKEN" MAIN ROTOR SHAFT INSTALLATION, IT WAS FOUND THE THE 6 BOLTS THAT ARE USED TO INSTALL THE EPICYCLIC REDUCTION GEARS TO THE MAST ALTHOUGH THE LOCKING MECHSDR CA130228006Nut · cracked(CAN) DURING A DAILY INSPECTION, A CRACKED NUT WAS OBSERVED WHICH IS LOCATED ON THE BOLT THAT CONNECTS THE TRANSMISSION MOUNT TO THE FORWARD DECK FITTING.
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