JASC 6520

Service difficulty reports · 865

Reports filed under 6520 · Tail 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 = '6520'
  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 QMLA2026090620062Gearbox · making metalTRGB CHIP LIGHT. INSPECTED AND CLEANED TGB CHIP DETECTOR. ALL MAINTENANCE COMPLETED.Sep 4, 2026 · N507AM · Snias AS350B3SDR QR9R2026071600001Chip Detector · faultedINTERMITTENT TAIL ROTOR CHIP LIGHT. CAME ON 3X AND REMAINED ON FOR ABOUT 3 TO 4 SECONDS EACH TIME. REMOVED AND REPLACED T/R CHIP DETECTOR; OPERATIONAL CHECK COMPLETED GOOD.Jul 16, 2026 · Bolkms BK117C2SDR QMLA2026060120033Chip Detector · contaminatedUPON LANDING TO TRANSLOAD A PATIENT, THE TGB CHIP LIGHT ILLUMINATED. DUE TO THIS INDICATION AND SUBSEQUENT ENGINE SHUTDOWN, WE WERE UNABLE TO COMPLETE THE TRANSPORT OF THE PATIENT. THE PATIENT WAS THEN MOVED BY AMBULANCE. CHIP DETECTOR CLEANED, FINDINGS INDICAMay 30, 2026 · N947MD · Bell 407SDR HEEA202603170001Gearbox · indicationTGB CHIP LIGHT. ENROUTE FROM MC809A TO HOUMA, TGB CHIP LIGHT CAME ON INTERMITTENTLY 4 TIMES. PILOTS DECIDED TO DEVIATE TO KGAO FOLLOWING THE EMERGENCY PROCEDURE.Mar 16, 2026 · N675P · Airbus H160BSDR QR9R2025100200001Gearbox · making metalABORTED TAKEOFF FOR T/R CHIP. CAUTION REMAINED ON AFTER ACTIVATING FUZZ BURN FOR ONE SECOND. CHIP FOUND DURING IGB CHIP DETECTOR INSP THAT REQUIRES REPLACEMENT OF GEARBOX IAW 65-32-00, 6-23 TABLE 1 ITEM D. REMOVED AND REPLACED GEARBOX IAW AMM 65-32-00, 4-1; MOOct 2, 2025 · Bolkms BK117C2SDR GVNA202505280002Gearbox · no discrepancySHORTLY AFTER TAKE-OFF, THE T/R CHIP CAUTION LIGHT ILLUMINATED IN CRUISE FLIGHT. THE PILOT PERFORMED ONE FUZZ BURNER ACTIVATION, BUT THE LIGHT CAME BACK ON. HE RETURNED TO BASE AND LANDED UNEVENTFULLY. MECHANIC CHECKED INT AND T/R GEARBOX CHIP PLUGS AND FOUMay 22, 2025 · N457JD · Bolkms BK117C2SDR 2025F00133Gearbox · no discrepancySHORTLY AFTER TAKE-OFF, THE T/R CHIP CAUTION LIGHT ILLUMINATED IN FLIGHT. PILOT PERFORMED ONE FUZZ BURNER ACTIVATION, BUT THE LIGHT CAME BACK ON. THE PILOT RETURNED TO BASE AND LANDED UNEVENTFULLY. MECHANIC CHECKED T/R AND INTERMEDIATE GEARBOXES FOR DEBRIS May 22, 2025 · N457JD · Bolkms BK117C2SDR 6BMA202505150001Gearbox · warning lightTAIL GEARBOX CHIP LIGHT ILLUMINATED ON GROUND DURING TRAINING.May 13, 2025 · N145NE · Bolkms BK117D3SDR QMLA2025032720042Chip Detector · contaminatedT/R CHIP CAUTION LIGHT ILLUMINATED MOMENTARILY DURING FLIGHT. (10 SECONDS OR LESS) CLEANED CHIP DETECTOR. THIS AIRCRAFT HAS BEEN RETURNED TO REVENUE SERVICE, REF # MEC-007504.Mar 25, 2025 · N901NM · Bell 407SDR M3XA20240731010Gearbox · making metalPILOT REPORTED A TAIL ROTOR GEARBOX CHIP LIGHT IN FLIGHT AND PERFORMED A PRECAUTIONARY LANDING AT IOWA CITY, IA AIRPORT. MECHANIC INSPECTED TAIL ROTOR CHIP DETECTOR AND FOUND A CAT D CHIP. PERFORMED MAINTENANCE IAW AMM 64-40-00, 6-1. PERFORMED MOC WITH NO FJul 30, 2024 · N301MF · Urocop EC135P2SDR 2024FA0000270Nut · loosePRE-INSTALLATION INSPECTION BY A CANADIAN CUSTOMER FOLLOWING OVERHAUL BY AIRBUS HELICOPTERS CANADA IDENTIFIED THE INPUT FLANGE WAS LOOSE. THE TAIL GEARBOX WAS RETURNED TO AIRBUS HELICOPTERS CANADA FOR INVESTIGATION WHICH IDENTIFIED THE NUT DRAG TORQUE WAS NOT Mar 28, 2024SDR QMLA2023101920093Chip Detector · unknownWHILE ENROUTE FROM HCNMC TO HLBB WHILE @ 5500MSL, 2000'AGL, 110KIAS; EXPERIENCED A FLICKERING TRGB CHIP CAUTION LIGHT. THIS OCCURRED 3 TIMES; PILOT MOVED COLLECTIVE THE LAST TIME AND THE LIGHT FLASHED AS HE MOVED THE COLLECTIVE. PILOT CONFIRMED THE LIGHT HAD FOct 16, 2023 · N11UQ · Urocop EC130T2SDR QMLA2023102120097Gearbox · unknownTAIL ROTOR CHIP LIGHT CAME ON AT TAKEOFF. REMOVED AND INSPECTED TAIL ROTOR CHIP DETECTOR. ONE PIECE OF FUSS WAS NOTED. BUT WAS UNABLE TO COLLECT. DRAINED AND FLUSHED TAIL ROTOR GEARBOX. PERFORMED 30 MINUTE GROUND RUN. NO DEFECTS NOTED. ALL WORK DONE IN ACCOROct 14, 2023 · N222SH · Urocop EC130T2SDR QMLA2023081920065Gearbox · unknownMAINTENANCE PERFORMED 60 MONTH INSPECTION ON THE TAIL ROTOR ASSEMBY AND REPLACED THE TAIL ROTOR GEARBOX FROM AN OVERHAULED ONE SENT FROM FAA REPAIR STATION J80R365Y EASA.145.5160 ARIZONA. ON 19 AUGUST APPROXIMATELY 0620 CREW EXPERIENCED AN INTERMITTENT T/R CHIAug 19, 2023 · N372AM · Bell 407SDR YV3R2023063000573Gearbox · defectiveCUSTOMER REPORTED GEARBOX P/N: B021-1 HAD VIBRATION, OUTPUT SHAFT HARD TO TURN, AND LEAKING.May 15, 2023 · Robsin R22BETAIISDR 2022FA0000660Gearbox · making metalRECEIVE T\R CHIP WARNING. ON SHORT FINAL TO LANDING SO NO TIME TO BURN. FOUND A SMALL SLIVER ON THE 90 DEGREE G\B. FOLLOWED MANUFACTURES RECOMMENDED PROCEDURES. NO FURTHER ISSUESOct 28, 2022 · N140SF · Bolkms BK117C2SDR YV3R2022052600530None · defectiveCUSTOMER REPORTED TAIL ROTOR GEARBOX ASSEMBLY P/N: C021-1 LEAKED FROM THE INPUT CARTRIDGE SEAL.May 17, 2022 · Robsin R44RAVENIISDR YV3R2022052600528None · defectiveCUSTOMER REPORTED TAIL ROTOR GEARBOX ASSEMBLY P/N: B021-1 EXPERIENCE METAL CONTAMINATION. NOTE: CORRECTED UNIQUE CONTROL #YV3R2022052600528.Apr 9, 2022 · Robsin R22BETAIISDR YV3R2020052600528None · defectiveCUSTOMER REPORTED TAIL ROTOR GEARBOX ASSEMBLY P/N: B021-1 EXPERIENCE METAL CONTAMINATION.Apr 9, 2022 · Robsin R22BETAIISDR QMLA2021110220058Gearbox · noneON FINAL APPROACH TO JEFFERSON UNIVERSITY HOSPITAL (9PA8), ROOFTOP PAD, TR CHIP LIGHT ILLUMINATED. PIC ABORTED THE LANDING, AND OPTED TO CUNDUCT A PRECAUTIONARY LANDING AT PENN'S LANDING HELIPORT (P72), LOCATED 1.25 MILES AWAY. **SUPPLEMENTAL INFORMATION** 1Oct 29, 2021 · N145TJ · Bolkms BK117C2SDR QMLA2021110120057Gearbox · noneON FINAL APPROACH TO JEFFERSON UNIVERSITY HOSPITAL (9PA8), ROOFTOP PAD, TR CHIP LIGHT ILLUMINATED. PIC ABORTED THE LANDING, AND OPTED TO CUNDUCT A PRECAUTIONARY LANDING AT PENN'S LANDING HELIPORT (P72), LOCATED 1.25 MILES AWAY.Oct 29, 2021 · N145T · Bolkms BK117C2SDR YV3R2021090700493Gearbox · leakingCUSTOMER REPORTED TAIL ROTOR GEARBOX P/N: B021-1 INPUT SEAL LEAKING.Aug 19, 2021 · Robsin R22BETAIISDR AC2A2021051713902Clamp · wornCLAMPED ADAPTER P/N 3G6320A16551, S/N DAT197 AND ADAPTER CLAMPS P/N 3G6320A16651, S/N AVI 0406 WERE REMOVED FROM MGB 3G6320A00134, S/N V44 IN PREPARATION FOR SHIPMENT OF MGB IN FOR OVERHAUL. ADAPTER AND CLAMPS DISPLAY EVIDENCE OF SIGNIFICANT WEAR OF 0.010" ON May 15, 2021 · N139FW · Agusta AB139SDR AC2A2021051713901Adapter · wornCLAMPED ADAPTER P/N 3G6320A16551, S/N DAT197 AND ADAPTER CLAMPS P/N 3G6320A16661, S/N AVI 0406 WERE REMOVED FROM MGB 3G6320A001434, S/N V44 IN PREPARATION FOR SHIPMENT OF MGB IN FOR OVERHAUL. ADAPTER AND CLAMPS DISPLAY EVIDENCE OF SIGNIFICANT WEAR OF 0.010" OMay 15, 2021 · N139FW · Agusta AB139SDR QMLA2020123020070Chip Detector · contaminatedDURING FLIGHT THE TAIL ROTOR CHIP DETECTOR LIGHT TURNED ON. LANDED AT WICKENBURG AZ AIRPORT, REMOVED CHIP DETECTOR AND FOUND PASTE. REMOVED PASTE FROM CHIP DETECTOR AND FOLLOWED BHT 407 MM DMC-407-A-65-00-00-00A-310A-A (UNWANTED PARTICLES) AND DMC-407-A-65-Dec 29, 2020 · N409GA · Bell 407SDR QR9R20201215001Screw · shearedA POSTFLIGHT INSPECTION REVEALED TWO STUD SCREWS OF THE TAIL ROTOR GEARBOX HAD SHEARED.Dec 15, 2020 · Bolkms BK117C2SDR QR9R20201211001Screw · brokenA POSTFLIGHT INSPECTION REVEALED TAIL ROTOR GEARBOX SCREW HAD BROKEN.Dec 11, 2020 · Bolkms BK117C2SDR YV3R2020120200397Gearbox · defectiveCUSTOMER REPORTED TAIL ROTOR GEARBOX P/N: C021-1 CHIP LIGHT ILLUMINATED, AND UPON INSPECTION AN OVERSIZED CHIP WAS FOUND.Nov 12, 2020 · Robsin R44RAVENIISDR YV3R2020112500394Gearbox · making metalCUSTOMER REPORTED TAIL ROTOR GEARBOX P/N: B021-1 WAS MAKING METAL.Nov 11, 2020 · Robsin R22BETAIISDR QMLA2020092520048Gearbox · making metalPILOT REPORTED A TAIL ROTOR CHIP LIGHT DURING CRUISE FLIGHT. IT FLICKERED AT FIRST, AND AFTER ABOUT 30 SECONDS CAME ON SOLID. THE PILOT IMMEDIATELY DIVERTED TO THE CLOSEST AIRPORT. ONCE SAFELY ON THE GROUND, HE CONTACTED MAINTENANCE. THE MECHANIC ARRIVED ASep 24, 2020 · N530H · Snias AS350B3SDR 2020FA0000360Gear · shearedTAIL ROTOR TRANSMISSION P/N 369D25400 SERIAL NUMBER 1539 WAS RECEIVED FOR UNIT MAKING METAL. UPON INSPECTION AND DISASSEMBLY IT WAS NOTED THAT THE 369D25434 INPUT GEAR SERIAL NUMBER 5304-1950 WAS SHEARED AT THE LOCATION OF THE ROLL PIN INSTALLATION POINT ON TAug 5, 2020 · N405AT · Hughes 369DSDR YV3R2020060300281Seal · leakingCUSTOMER REPORTED TAIL ROTOR GEARBOX PN C021-1 INPUT SEAL WAS LEAKING.May 27, 2020 · N4876J · Robsin R44SDR AC2A2020041013901Intermed Gearbox · wornINTERMEDIATE GEARBOX (IGB) INPUT FLANGE P/N 3G6521A00232 S/N HCA3715 WAS WORN SPLINES TO LIMITS.Apr 10, 2020 · N639GG · Agusta AW139SDR AC2A2020020713901Chip Detector · unbondedTHE INTERMEDIATE GEARBOX (IGB) CHIP DETECTOR HAS ROTATIONAL MOVEMENT AT THE PIN FOLLOWER RETAINING RING COLLAR.Feb 7, 2020 · N639MM · Agusta AW139SDR CA190726010Indicator · malfunctioned(CAN) INDICATOR FOUND TO BE ROTATED IN TAIL ROTOR GEARBOX HOUSING. SIGHT GLASS REMOVED AND INDICATOR FOUND INSTALLED UPSIDE DOWN. UPSIDE DOWN INSTALLATION OCCURRED AT OVERHAUL OF TAIL ROTOR GEARBOX. UPSIDE DOWN INSTALLATION OF INDICATOR NEGATES THE LOCKING MECJul 22, 2019 · Bell 206BSDR 7AJA2019040200001Gearbox · warning lightTGB CHIP LIGHT ILLUMINATED IN LEVEL FLIGHT EN ROUTE. LIGHT FLICKERED AND THEN EXTINGUISHED AND REMAINED OFF FOR THE REST OF THE FLIGHT FOLLOWING POWER REDUCTION PER RFM. MAINTENANCE PERFORMED PROCEDURES IAW EC130T2 AMM 05-50-00, 6-1. NO CHIPS OR DEFECTS FOUMar 29, 2019 · N892GT · Urocop EC130T2SDR CA190312016Bearing · making metal(CAN) GEARBOX GENERATING METAL FLAKE. GEARBOX REPAIRED BY ORIGINAL EQUIPMENT MANUFACTURER WITHIN 8 HOURS. GEARBOX REMOVED AND RETURNED TO ORIGINAL EQUIPMENT MANUFACTURER COMPONENT SHOP FOR FURTHER INVESTIGATION AND REPAIR.Mar 11, 2019 · Snias AS350BASDR 8HBR20190211021Seal · damagedTAIL ROTOR GEAR BOX INPUT SEAL LEAKING OIL FROM GEAR BOX.Feb 10, 2019 · N508AD · Robsin R22BETAIISDR QMLA2018120768130Gearbox · chippedAIRCRAFT SINGLE ENGINE TAKE OFF #1 ENGINE AT FLY # 2 ENGINE AT IDLE. TRGB HAD A CHIP WHICH REQUIRED TRGB CHANGE. SDR SUBMITTED PER COMPANY POLICY.Dec 6, 2018 · N135CH · Urocop EC135P2SDR QMLA2018081318094Pinion Gear · wornDURING PRE-TAKEOFF FOR A SECOND FLIGHT OF THE DAY. THE PILOT NOTICED THE TAIL ROTOR CHIP LIGHT ILLUMINATED. PILOT COMPLETED SHUTDOWN OF AIRCRAFT WITHOUT INCIDENT. ON INITIAL INSPECTION OF CHIP DETECTOR THE NORMAL FUZZ WITH SLUDGE APPEARED. AFTER FURTHER INSAug 11, 2018 · N150AM · Bell 407SDR QMLA2018072418088Gearbox · making metalTAIL ROTOR CHIP CAUTION IN HOVER PRIOR TO DEPARTURE. FOUND METAL ON CHIP DETECTOR. REPLACED IGB.Jul 22, 2018 · N145SU · Bolkms BK117C2SDR CA180706011Gearbox · loose(CAN) THE FOLLOWING WAS REPORTED TO BELL: UPON UNSCHEDULED INSPECTION OF THE TAILROTOR GEARBOX BY RECOMMENDATION OF BELL CSR, THE OPERATOR DISCOVERED PLAY BETWEEN THE TAILROTOR GEARBOX AND THE TAIL BOOM. THE AIRCRAFT HAS APPROXIMATELY 1400 FLIGHT HOURS LOGGEDJul 3, 2018 · Bell 429SDR QMLA2018052118061Case · damagedON REMOVING THE TAIL ROTOR GEARBOX COWLING TO PERFORM AN INSPECTION, NOTED DAMAGE TO THE GEARBOX CASE CAUSED BY IMPROPER HARDWARE LOCATION. DAMAGE WAS NOTED TO BE 3.34MM DEEP.May 21, 2018 · N511SL · Agusta A119SDR QMLA2018022718023Gearbox · crackedTHIS AIRCRAFT REMAINS OUT OF SERVICE AT THE TIME OF THIS SUBMISSION. THE AFT VERTICAL FIN SPAR WAS CLEANED TO PERFORM AD 1998-24-13. THE FOLLOWING DAY A VERY SMALL SPOT OF OIL WAS NOTICED ON THE SPAR BELOW THE LEFT SIDE OF THE T/R GEARBOX. THE GEARBOX WAS REMOFeb 26, 2018 · N270SL · Bolkms BK117B2SDR 2018FA0000096Bushing · backed outDURING PREFLIGHT INSPECTION, NOTICED THAT THE TAIL ROTOR GEARBOX CONTROL LEVER LOWER BUSHING HAD BACK OUT OF ITS HOLE A FEW THOUSANDTHS OF AN INCH. THE LEVER HAD BEEN REPLACED 86.9 HOURS PREVIOUSLY FOR THE SAME PROBLEM. THIS IS A RECURRING PROBLEM.Sep 7, 2017 · N614HH · Snias AS350B3SDR 2018FA0000094Bushing · backed outDURING A PREFLIGHT INSPECTION, NOTICED THAT THE TAIL ROTOR GEARBOX CONTROL LEVER LOWER BUSHING HAD BACKED OUT OF ITS HOLE A FEW THOUSANDTHS OF AN INCH. THIS LEVER HAD BEEN REPLACED 82.5 HOURS PREVIOUSLY FOR THE SAME PROBLEM.Aug 25, 2017 · N519FF · Snias AS350B3SDR JYDR20170817227Gearbox · overservicedINTERMEDIATE GEAR BOX CHIP LIGHT WHILE FIGHTING FIRE. PILOTS IMMEDIATELY RETURNED TO BASE. GEAR BOX REMOVED FROM AIRCRAFT. INTERMEDIATE GEAR BOX OIL WAS DRAINED AND CAPTURED. THE IGB WAS FOUND TO HAVE ALMOST 3 US GALLONS OF OIL. THIS DOES NOT TAKE INTO ACCOUAug 15, 2017 · N176AC · Skrsky S64ESDR 2018FA0000095Bushing · backed outDURING A PREFLIGHT INSPECTION, NOTICED THAT THE TAIL ROTOR GEARBOX CONTROL LEVER LOWER BUSHING HAD BACKED OUT OF ITS HOLE A FEW THOUSANDTHS OF AN INCH.Aug 10, 2017 · N614HH · Snias AS350B3SDR 2018FA0000092Bushing · backed outDURING DAILY PREFLIGHT INSPECTION, NOTICED THAT THE TAIL ROTOR GEARBOX CONTROL LEVER LOWER BUSHING HAD BACKED OUT OF ITS HOLE A FEW THOUSANDTHS OF AN INCH. THIS IS A RECURRING PROBLEM.Jul 11, 2017 · N519FF · Snias AS350B3SDR QMLA2017070317063Warning Light · false activationUPON ARRIVING AT A SCENE JUST AS WE BEGAN THE OVERHEAD RECON THE TAIL ROTOR CHIP LIGHT ILLUMINATED. EXECUTED THE EP IAW THE AIRCRAFT EMERGENCY PROCEDURE, THE LIGHT CAME ON AGAIN AFTER THE SECOND ATTEMPT TO BURN OFF. THE FLIGHT WAS ABORTED, AIRCOM AND GROUND Jul 3, 2017 · N578AM · Bolkms BK117C2
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