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 QMLA2026070420042Transmission · making metalXMSN CHIP ILLUMINATED AT PICKUP HOSPITAL. MISSION WAS ABORTED, DID NOT STARTUP WITH TRANSMISSION CAUTION. CONTACTED MECHANIC TO FIX ON STATION. INSPECTED CHIP CONFIRMED CAT C RTSJul 3, 2026 · N865NC · Urocop EC135P2SDR JTAA20260504001Transmission · fodDURING FLIGHT HAD LOW TRANSMISSION PRESSURE AND ELS SYSTEM KICKED ON. FOUND MGB LINER MATERIAL IN CHIP DETECTOR SCREEN OF MGB.May 4, 2026 · N825WL · Skrsky S61NSDR 2026F00097Transmission · fodDURING FLIGHT HAD LOW TRANSMISSION PRESSURE AND ELS SYSTEM KICKED ON. FOUND MGB LINER MATERIAL IN CHIP DETECTOR SCREEN OF MGB.May 4, 2026 · N825WL · Skrsky S61NSDR QMLA2026040620026Transmission · making metalTRANSMISSION CHIP LIGHT IN FLIGHT. DRAINED AND FLUSHED SYSTEM. OPS CHECKS GOOD RTS,Mar 29, 2026 · N528AM · Bell 407SDR QMLA2026032020021Warning Light · false activationTRANSMISSION CHIP LIGHT ON ROLL UP TO FLIGHT. REMOVED AND INSPECTED ALL TRANSMISSION CHIP DETECTORS FOUND NO METAL DURING REINSTALL OF LOWER CHIP DETECTOR CHIP LIGHT CAME ON. TESTED LOWER CHIP DETECTOR FOUND IT HAD INTERNALLY FAILED.Mar 20, 2026 · N645AM · Bell 407SDR 2026FA0000161Transmission · making metalPILOT REPORTED INTERMITTENT MAIN GEARBOX CHIP LIGHT DURING APPROACH TO LANDING. MAGNETIC PLUG INSPECTION REVEALED METAL CONTAMINATION BEYOND ACCEPTABLE LIMITS AND TRANSMISSION WAS REMOVED FOR REPAIR.Mar 5, 2026 · N454JH · Hughes 369ESDR QMLA2026012520005Chip Detector · false activationTRANSMISSION CHIP LIGHT CAME ON DURING APPROACH. CLEANED CHIP, GROUND RUN ACCOMPLISHED IAW DMC-407-A-63-00-00-0/A-319 TABLE 1Jan 23, 2026 · N473RA · Bell 407SDR 2026FA0000002Gearbox · warning lightDURING FLIGHT MGB CHIP LIGHT ILLUMINATED. PILOT ATTEMPTED TWO ATTEMPTS AT BURNING THE CHIP. LIGHT REMAINED ON SO PILOT ELECTED TO MAKE AN UNSCHEDULED LANDING AT A NEARBY AIRPORT.Jan 4, 2026 · N540SF · Bolkms BK117D3SDR HEEA202510300001Chip Detector · dirtyDURING FLIGHT THE DISPATCH MESSAGE XMSN: MGB CHIP FRT AGB SENSOR DISPLAYED, CREW INITIATED RTB.Oct 25, 2025 · N673P · Airbus H160BSDR HEEA202509220001Gearbox · making metalDURING CLIMB OUT, NOTICED A MGB CHIP DISPATCH MESSAGE.Sep 19, 2025 · N673P · Airbus H160BSDR CHIA202508149805Transmission · overheatedTHE NR 2 ENGINE TRANSMISSION TEMPERATURE EXCEEDED UPPER TEMPERATURE LIMIT IN FLIGHT RESULTING IN PILOTS INITIATING ENGINE XMSN HOT EMERGENCY PROCEDURES AND RETURNING TO BASE FOR AN UNSCHEDULED LANDING. REMOVED THE NR 2 ENGINE TRANSMISSION ASSEMBLY AS UNSERVICAug 14, 2025 · N246CH · Boeing 234SDR QMLA2025070220071Gearbox · warning messageMAIN ROTOR GEARBOX CHIP LIGHT ILLUMINATED IN FLIGHT: 4TH RECENT EVENT.Jul 2, 2025 · N328CH · Urocop EC130B4SDR QMLA2025062920070Gearbox · making metalMGB CHIP LIGHT ILLUMINATED DURING STABLE 3-5FT HOVER PRIOR TO TAKEOFF. INSPECTED AND CLEANED MGB CHIP DETECTOR. CLASS F CHIP FOUND. PERFORMED GROUND RUN UP WITH NO CHIPS DETECTED. ALL MAINTENANCE COMPLETED. AIRCRAFT RELEASED TO REVENUE SERVICE. #MEC-011620Jun 29, 2025 · N328CH · Urocop EC130B4SDR HEEA202505270002Transmission · making metalTRANSMISSION CHIP LIGHT ILLUMINATED IN FLIGHT, RETURNED TO DEPARTURE POINT.May 25, 2025 · N454PH · Bell 407SDR QMLA2025052020058Gearbox · making metalMAIN ROTOR GEARBOX CHIP 'MGB CHIP' LIGHT ILLUMINATED IN FLIGHT. INSPECTED FOUND 1 CLASS F PARTICLE. - GROUND RUN CW - OPS CHECK GOOD.May 20, 2025 · N328CH · Urocop EC130B4SDR QMLA2025051520056Gearbox · warning lightMAIN ROTOR GEAR BOX CHIP INDICATOR LIGHT ILLUMINATED IN FLIGHT. FIRST SET OF FLIGHTS FROM CHANGING OF MBG OIL FILTER YESTERDAY.May 16, 2025 · N328CH · Urocop EC130B4SDR QMLA2025051020054Transmission · warning lightTRANSMISSION MAIN ROTOR CHIP LIGHT.May 9, 2025 · N338AM · Bell 407SDR HEEA202504100001Transmission · making metalENROUTE TO SM76, TRANSMISSION CHIP LIGHT ILLUMINATED INFLIGHT. CONTACTED COMM CENTER AND FOUND NEAREST AVAILABLE PLATFORM TO LAND. NO SECONDARY INDICATIONS. DAY MECHANIC PERFORMED CHIP LIGHT INVESTIGATION OFFSHORE. CLEANED AND INSPECTED TRANSMISSION CHIP DETECApr 7, 2025 · N448PH · Bell 407SDR QMLA2025031720036Chip Detector · contaminatedINTERMITTENT TRANSMISSION CHIP LIGHT IN FLIGHT. FOUND SMALL SLIVERS ON LOWER CHIP DETECTOR. AMOUNT AND TYPE CONSIDERED NEGLIGIBLE. - CHANGED FILTER.Mar 17, 2025 · N697AM · Bell 407SDR QMLA2025020220011Gearbox · making metalXMSN CHIP LIGHT ILLUMINATED ON DEPARTURE.Feb 2, 2025 · N136HN · Urocop EC135P2SDR HEEA202501200001Gearbox · making metalON CLIMB OUT, GOT A MAIN GEARBOX CHIP CAS MSG. BURNED IT THREE TIMES AND CAME ON A FOURTH TIME.Jan 17, 2025 · N151PH · Agusta AW139SDR HEEA202501020001Gearbox · making metalLN CRUISE ON A FLIGHT FROM HMA TO GB-386 POSEIDON, A MGB CHLP CAUTION ILLUMINATED, FOLLOWED BY INPUT 2 CHIP CAUTION APPROXIMATELY 4 MINUTES LATER. CREW DEVIATED TO KHUM UPON FIRST CAUTION.Dec 31, 2024 · N932PH · Skrsky S92ASDR HEEA202411260001Transmission · making metalSHORTLY AFTER TAKEOFF WHILE IN CRUISE FLIGHT, CHIP XMSN LIGHT ILLUMINATED. RETURNED TO HMAE.Nov 22, 2024 · N406PH · Bell 407SDR KY1R20241101001Cooling Fan · separatedDURING A COMPANY-MANDATED DAILY INSPECTION OF THE AIRCRAFT, A TECHNICIAN FOUND THE OUTLET SCREEN FOR THE MAIN GEARBOX (MGB) OIL COOLER FAN WAS BROKEN WITH THE WELDED MESH SPLAYED OUTWARD. FURTHER INVESTIGATION REVEALED THAT THE MGB OIL COOLER FAN CONTAINMENT Nov 1, 2024 · N382MD · Agusta AW139SDR QMLA2024101520132Transmission · making metalMAIN XMSN CHIP ILLUMINATED ON START. CLEANED MAG CHIP DETECTOR ENGINE RUNS COMPLETE. IAW AMM 63-40-00Oct 12, 2024 · N535LN · Urocop EC135P2SDR 2024FA0000762Bearing · wrong partWHILE INSTALLING X4 'OVERHAULED' ACCESSORY BEARINGS ONTO ACCESSORY SHAFT, ENGINEER NOTICED THE ID OF X2 BEARINGS WERE SIGNIFICANTLY SMALLER THAN THE ID OF THE OTHER 2 BEARINGS. X4 ACCESSORY BEARINGS P/N: 369F5149-1 SENT TO PAS MRO FOR OVERHAUL ON JOB/40834 (JOct 9, 2024 · Hughes 369SDR MHR22024092400733Bearing · flakingTRANSMISSION ASSEMBLY HAD METAL IN OIL.Sep 24, 2024 · N216MH · Bell 206L4SDR HEEA202409230001Gearbox · making metal#1 INPUT CHIP LIGHT ILLUMINATED.Sep 22, 2024 · N940PH · Skrsky S92ASDR QMLA2024092420124Gearbox · making metalMAIN TRANSMISSION CHIP LIGHT DETECTOR ILLUMINATED. OIL PRESSURE STEADYSep 21, 2024 · N534LN · Urocop EC135P2SDR HEEA202407290001Transmitter · inoperativeDURING CRUISE FLIGHT THE MGB PRESSURE INDICATION BEGAN TO FLUCTUATE BETWEEN 65PSI TO 0 PSI. AIRCRAFT RETURNED TO BASE.Jul 26, 2024 · N725P · Skrsky S76CSDR 2VKA2024072453407Washer · crackedWHILE CHANGING TRANSMISSION ASSEMBLY, TECHNICIAN NOTICED PYLON RETAINING BOLT WASHER PN:140-007-25S22E6 CRACKED ALL THE WAY THROUGH ON ONE SIDE.Jul 23, 2024 · N390SF · Bell 407SDR HEEA202407150001Sensor · inoperativeON OUTBOUND LEG, DURING CLIMB OUT, MGB PRESSURE INCREASED INTO THE PRECAUTIONARY (YELLOW) RANGE. RTB, DECLARED EMERGENCY, LANDED RUNWAY 36 AT HOUMA.Jul 11, 2024 · N936PH · Skrsky S92ASDR QMLA2024062520071Bypass Valve · faultedTHE PILOT PICKED UP PATIENT AS DESIGNATED LZ/SCENE AND DEPARTED THE SCENE FOR DESERT REGIONAL MEDICAL CENTER. WHILE ON CLIMB OUT (AROUND 1000') OVER MOUNTAINOUS TERRAIN, PILOT SCANNED ENGINE & TRANSMISSION TEMPS & PRESSURES. WHEN PILOT LOOKED AT NR 1 ENG COLUJun 23, 2024 · N586AM · Urocop EC135P2SDR M3XA20240425006Transmission · making metalPILOT PERFORMED A PRECAUTIONARY LANDING FOR A MAIN XMSN CHIP LIGHT ILLUMINATION IN CRUISE FLIGHT. MECHANIC INSPECTED CHIP DETECTORS AND FOUND A SMALL SLIVER. CLEANED CHIP DETECTOR AND PERFORMED A SERVICEABILITY CHECK. DRAINED AND SERVICED WITH NEW OIL, REPLApr 24, 2024 · N516MT · Bell 407SDR QMLA2024042220040Transmission · making metalMAIN TRANSMISSION CHIP LIGHT ILLUMINATED IN FLIGHT DURING CLIMB SHORTLY AFTER TAKEOFF. PILOT ABORTED FLIGHT AND RETURNED TO THE BASE. MECHANIC PERFORMED UNWANTED PARTICLE INSPECTION AND FOUND ONE SLIVER. NORMAL FINDINGS AFTER MAJOR MAINTENANCE (MAST REPLACEMEApr 13, 2024 · N697AM · Bell 407SDR AC2R921GL03192024Bushing · crackedTHREE OF THE BUSHINGS ON THE RH MOUNTING FOOT WAS FOUND TO BE FRACTURED.Mar 19, 2024 · N921GL · Skrsky S92ASDR 2024FA0000135Oil Cooler · sheared#2 ENG OIL COOLER, SUSPECTED SHAFT BROKEN. REPORTED #2 ENG OIL TEMP FLUCTUATION. INSP REVEALED #2 ENG OIL COOLER SHAFT SHEARED. REM'D #2 OIL COOLER FAN ASSY. INSTALLED SERVICEABLE FAN ASSY, P/N SAME. PERFORMED GROUND RUN/LEAK CHK W/NO ANOMALIES. ACFT RETURNED Feb 6, 2024 · N455MH · Bolkms BK117C2SDR HEEA202401310001Transmission · making metalMAIN GEAR BOX CHIP LIGHT CAME ON. ALL OTHER INDICATIONS WERE NORMAL, RESET CIRCUIT BREAKER, AND LIGHT REMAINED ON. AIRCRAFT RETURNED TO HOUMA.Jan 30, 2024 · N794P · Skrsky S76CSDR 7ALA202407240174Washer · crackedDURING TRANSMISSION CHANGE TECHNICIANS FOUND THREE PYLON RETAINING BOLT WASHERS PN:140-007-25S22E6 ALL CRACKED ACROSS ONE SIDE ALL THE WAY THROUGH.Jan 24, 2024 · N314SF · Bell 407SDR 7ALA2024F00175Washer · crackedDURING TRANSMISSION CHANGE TECHNICIANS FOUND THREE PYLON RETAINING BOLT WASHERS PN:140-007-25S22E6 ALL CRACKED ACROSS ONE SIDE ALL THE WAY THROUGH.Jan 24, 2024 · N314SF · Bell 407SDR 2023FA0000809Seal · failedDURING INSPECTION FOUND MGB LOWER MAST SEAL IS LEAKING.Dec 5, 2023 · N553XB · Skrsky S76DSDR QMLA2023101220089Chip Detector · unknownPILOT ARRIVED AT GRANT MEMORIAL HOSPITAL. HE SHUT DOWN AND AFTER ABOUT 30 MINUTES, HE APPLIED POWER TO THE AIRCRAFT. AFTER APPLYING BATTERY POWER, BUT BEFORE ENGINE START, THE PILOT NOTICED THE "XMSN CHIP" CAUTION WAS ILLUMINATED. HE POWERED DOWN THE AIRCRAFT Oct 13, 2023 · N138HN · Urocop EC135P2SDR YV3R2023111500585Gearbox · defectiveCUSTOMER REPORTED MAIN ROTOR GEARBOX P/N: A006-6 WAS MAKING METAL.Sep 29, 2023 · Robsin R22BETAIISDR 2023F00280Gearbox · bypassingON CLIMB OUT FROM HMA, THE MGB BYPASS LIGHT ILLUMINATED. PERFORMED EP AND RETURNED FOR LANDING.Sep 18, 2023 · N940PH · Skrsky S92ASDR AC2A2023062213901Actuator · unserviceableROTOR BRAKE FAIL CAS ILLUMINATED ON SHUT DOWN WITH CALIPER INDICATING DOWN POSITION. REPLACED ROTOR BRAKE ACTUATOR.Jun 18, 2023 · N639MM · Agusta AW139SDR JYDR20230413094Bevel Gear · crackedMAIN GEAR BOX RECEIVED AT THIS REPAIR STATION FOR OVERHAUL. DURING THE OVERHAUL PROCESS THE MAIN BEVEL GEAR WAS FOUND TO HAVE A TOTAL OF 18 CRACKS. CRACKS FOUND BY MAGNETIC PARTIAL INSPECTION. THIS IS THE FIRST TIME THIS REPAIR STATION HAS FOUND CRACKS IN THISApr 12, 2023 · Skrsky S64ESDR 2023FA0000361Fitting · shearedDURING CRUISE FLIGHT EXPERIENCED A TOTAL LOSS OF ALL MAIN ROTOR TRANSMISSION FLUID DUE TO FAILURE OF 1 ELBOW FITTING (P/N: AS1040W0404). EMERGENCY LANDING PERFORMED WITH NO DAMAGE TO AIRCRAFT OR INJURY TO ANY OCCUPANTS. DURING CONVERSATIONS WITH THE OEM (BELL Mar 27, 2023 · N412VC · Bell 412EPSDR 8NZY202301180001Planetary Gear · damagedWHILE INSPECTING ONE OF THE FIVE PLANETARY GEARS. THE ENGINEER NOTICED A RING LIKE PATTERN ON ONE OF THE TEETH. WHEN THEY RUBBED THE AREA WITH THEIR FINGERNAIL TO SEE IF THE STAIN WAS PERMANENT A CHIP OF METAL FELL AWAY.Jan 18, 2023 · N350HC · Snias AS350B2SDR 2023FA0000024Transmission · making metalTRANSMISSION CHIP LIGHT ILLUMINATED, FOUND METAL DEBRIS ON LOWER CHIP DETECTORJan 11, 2023 · N416CF · Bell 407SDR EVCA20221115001Hose · splitMAIN GEARBOX PRESSURE LIGHT ILLUMINATED WHILE IN CRUISE FLIGHT, CABIN FILLED WITH SMOKE. COMPLETE LOSS OF TRANSMISION OIL NOTED AFTER SHUT DOWN.. DISCOVERED TRANSMISSION OIL LINE TO COOLER SPLIT.Nov 11, 2022 · N891GT · Urocop EC130T2
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