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 HEEA0014214Gear Box · wornT/R GR BOX OUTPUT SHAFT CHROME PLATING WEAR.May 15, 1998 · N60951 · Snias AS350B2SDR 98ZZZX2016Bearing · crackedBEARING CRACKS ARE BEYOND LIMITS. REPLACED WITH NEW BEARING SET.May 12, 1998 · N31AS · Snias AS350B2SDR HEEA0014136Bearing · delaminatedONE BEARING DELAMINATED.May 11, 1998 · N4034Q · Snias AS350B2SDR HEEA0014063Cover · wornFORWARD BORE WORN FROM BEARING SPINNING. REPLACED WITH NEW COVER.Apr 29, 1998 · N911TL · Bolkms BK117B1SDR 98ZZZX1847Bevel Gear · defectiveCANNOT GET GEAR PATTERN TO MOVE OFF TOE. TRIED IN TWO DIFFERENT GEARBOXES WITHOUT SUCCESS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Apr 27, 1998 · Bolkms BK117A1SDR 98ZZZX1846Hinge · defectiveLAMINATED HINGE DEFECTIVE, RECALLED PER SL 1337-65-97, BATCH 95L. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Apr 27, 1998 · Snias AS350BSDR HEEA0013993Pinion · defectiveSILVER COATING FLAKING FROM GEAR TOOTH.Apr 21, 1998 · Bell 206L1SDR 98ZZZX1702Gearbox · making metalDURING ROUTINE INSPECTION, MECHANIC FOUND METAL AND EXCESSIVELY DARK OIL IN GEARBOX. REMOVED FOR REPAIR AND REPLACED WITH SERVICEABLE UNIT. CONTROL NR 98-4-8.Apr 16, 1998 · N369AW · Hughes 369DSDR 98ZZZX1743Center Housing · crackedTAIL ROTOR GEARBOX WAS REMOVED FROM AIRCRAFT DUE TO A CRACK IN THE TAIL GEARBOX CENTER HOUSING WEB ADJACENT TO THE LOWER LEFT GEARBOX ATTACHMENT LUG. ENGINEERING REQUESTED THE QUALITY DEPARTMENT HELP FIND THE CRACKED AREA BECAUSE IT WAS NOT MARKED ON THE PARTApr 15, 1998 · N178AC · Skrsky S64FSDR HEEA0013861Gearbox · leakingINPUT AND OUTPUT SEALS LEAKING.Apr 6, 1998 · N427PH · Bell 407SDR 98ZZZX3856Gearbox · making metalPILOT LANDED AIRCRAFT AFTER T/R CHIP LIGHT CAUTION LIGHT ILLUMINATED. TAIL ROTOR CHIP DETECTOR WAS INSPECTED. A LARGE AMOUNT OF METAL ACCUMULATION WAS EVIDENT. TAIL ROTOR GEARBOX WAS REMOVED AND REPLACED AND SENT FOR EVALUATION. UPON TEARDOWN INSPECTION, OApr 6, 1998 · N369AW · Hughes 369DSDR HEEA0013752Center Case · wornT/R BORE WORN AND LOOSE LINERS (3 EACH).Apr 2, 1998 · N5029H · Bolkms BO105SSDR HEEA0013686Center Case · wornT/R BORE NOZZLE RING SEAT AND SUPPORT PIN SEAT DUE TO WEAR.Apr 2, 1998 · N133AE · Bolkms BO105SSDR HEEA0013498Gearbox · noisyGEARBOX WAS OVERHAULED AND NEW GEARS WERE INSTALLED. STATIC PATTERNS ON GEARS MATCHED TESTER SHEET AS REQUIRED. AFTER A FLIGHT OF 15 MINUTES CREW HEARD A HIGH PITCH NOISE FROM GEARBOX. GEARBOX WAS DIASSEMBLED AND COULD NOT FIND ANY DISCREPANCIES. NOTICED TMar 19, 1998 · Aerosp AS355F1SDR HCMA0000205Bearing · wornT/R ROTOR DRIVE BEARING IS WORN BEYOND LIMITS. (X)Mar 17, 1998 · N972BH · Snias AS350B2SDR HEEA0013202Gear Housing · defectiveVERIFICATION OF "B" DIM.Mar 4, 1998 · N5029H · Bolkms BO105SSDR HAIHCMA0178Lamification · tornREAR ROTOR LAMIFICATION IS TORN BEYOND LIMITS AND THERE IS NO "J" GAP.Mar 3, 1998 · N992BH · Snias AS350B2SDR 99ZZZX41Case · crackedGEARBOX SENT TO OVERHAUL SHOP FOR OIL LEAK. FOUND TO BE LEAKING THROUGH CRACK. CRACKED AT MOUNTING STUD BOSS.Mar 3, 1998 · N501AL · Bolkms BO105CSDR AU980780Seal · leaking(AUS) TAIL ROTOR GEARBOX INPUT SEAL LEAKING. PART TOTAL CYCLES: 15.Mar 2, 1998 · Bell 206B3SDR CA980317088Seal · leaking(CAN) POST FLIGHT WALK AROUND REVEALED OIL LEAK OF TAIL ROTOR GEARBOX. DISAASEMBLY SHOWED THAT INPUT SEAL DUST SEAL LIP HAD PEELED OFF AND WENT INTO THE SEALING LIP ALLOWING GEARBOX TO LOOSE IT''''S OIL DURINGA 40 MINUTE FLIGHT. CHIP DETECTOR WAS CLEAN AT THISFeb 19, 1998 · Bolkms BK117B1SDR HEEA0013030Lever · wornT/R GR BOX LEVER CONTROL BUSHINGS WORN.Feb 11, 1998 · N6097Z · Snias AS350B2SDR 98ZZZX1252Bearing Cup · failedON GROUND RUN UP, HAD BEARING FAILURE IN INPUT QUILL ASSEMBLY. COMPONENT P/N 7635705000041.Feb 11, 1998 · N376AL · Skrsky S76ASDR 98ZZZX1251Bearing Cone · failedON GROUND RUN UP, HAD BEARING FAILURE IN INPUT QUILL ASSEMBLY. COMPONENT P/N 7635705000041.Feb 11, 1998 · N376AL · Skrsky S76ASDR HAIHCMA0160Lamification · tornREAR ROTOR LAMIFICATIONS ARE TORN BEYOND LIMITS .Jan 27, 1998 · N992BH · Snias AS350B2SDR HEEA0012626Gearbox · leakingT/R GR BOX INPUT AND OUTPUT SEALS LEAKING OIL. ALSO GEARBOX VENT LINE LEAKING EXCESSIVELY.Jan 23, 1998 · N407PH · Bell 407SDR 98ZZZX863Gearbox · crackedDURING PRE-FLIGHT INSPECTION, A CRACK IN THE TAIL ROTOR GEARBOX HOUSING WAS FOUND IN THE AREA OF THE MOUNTING STUDS.Jan 12, 1998 · N912TG · Bolkms BK117B1SDR 98ZZZX915Bevel Gear Shaft · defectiveGEAR COULD NOT GET A CONTACT PATTERN WITHIN ACCEPTABLE LIMITS WHEN MATCHED TO BEVEL. GEAR SHAFT P/N 4639311042, S/N 978. REMOVED AND REPLACED.Jan 6, 1998 · Bolkms BK117C1SDR 98ZZZX912Bearing · roughBEARING WAS ROUGH WHEN INSTALLED ON BEVEL GEAR SHAFT. REMOVED AND REPLACED.Jan 5, 1998 · Bolkms BK117C1SDR 98ZZZX911Bearing · defectiveOUTPUT SHAFT WOULD NOT FIT THROUGH ROLLERS WHEN BEARING WAS INSTALLED IN COVER OF T/R GEARBOX. REMOVED AND REPLACED.Jan 5, 1998 · Bolkms BK117A3SDR 98ZZZX910Bearing · roughBEARING WAS ROUGH WHEN INSTALLED ON LEVER GEAR SHAFT. REMOVED AND REPLACED.Jan 5, 1998 · Bolkms BK117C1SDR HEEA0012326Thermovalve · defectiveMETAL CONTAMINATION IN TRANSMISSION.Dec 9, 1997 · N230UN · Bell 230SDR HEEA0012325Oil Cooler · contaminatedMETAL CONTAMINATION IN TRANSMISSION.Dec 9, 1997 · N230UN · Bell 230SDR HEEA0012324Panel Assy · damagedTRANSMISSION ASSY DAMAGE ON R/H TOP SIDE.Dec 9, 1997 · N230UN · Bell 230SDR HEEA0012265Bearing · separationRUBBER SEPARATION.Dec 5, 1997 · N350BZ · Snias AS350B2SDR HEEA0012176Bevel Gear · pittedLARGE PIT ON ONE EACH GEAR TOOTH. REPLACED WITH SERVICEABLE GEAR SET.Dec 3, 1997 · N5029H · Bolkms BO105SSDR 97ZZZX5215Bearing · galledTAIL ROTOR GEARBOX DISASSEMBLED FOLLOWING CHIP LIGHT INDICATION. FOUND OUTPUT SHAFT DUPLEX BEARING SET BAD. INNER RACE OF BEARING SEVERELY GALLED AND FLAKING. SUBMITTER STATED THIS WAS THE SECOND OCCURRENCE OF THIS TYPE FAILURE WITHIN 600 HOURS, AND 17 MONDec 2, 1997 · N58251 · Hughes 369DSDR HEEA0012167Bearing · separationBEARING RUBBER SEPARATION.Dec 1, 1997 · N40466 · Snias AS350B2SDR CA971219010Shim · misrepaired(CAN) TAIL ROTOR GEARBOX ASSEMBLY WAS REMOVED FROM AIRCRAFT FOR CORROSION. BACKLASH OF GEARS WAS FOUND TO BE 0.055 INCH OVER ALLOWABLE LIMITS. GEARS WERE SCRAPPED BECAUSE OF IMPROPER WEAR PATTERN AND LOADING.Dec 1, 1997 · Bell 212SDR 97ZZZX5216Coupling · crackedCOUPLING WAS FOUND CRACKED IN 7 PLACES. IT WAS LOCATED AT THE INTERMEDIATE GEARBOX OUTPUT FLANGE. THE PREVIOUS COUPLING WAS ALSO CRACKED. THE RUN-OUT WAS CHECKED AND FOUND WITHIN MANUFACTURER'S LIMITS. THE NR 5 T/R DRIVESHAFT AND INTERMEDIATE GEARBOX WERENov 25, 1997 · N72649 · Skrsky S76ASDR 98ZZZX1240Bearing · defectiveTAIL ROTOR BEARING IS DEFECTIVE PER SL 1337-65-97, DATED 11-24-97.Nov 24, 1997 · Snias AS350B2SDR HEEA0012115Sleeve Assy · corrodedSLEEVE ASSY HAS CORROSION ON O'RING GROOVE. REPLACED WITH SERVICEABLE SLEEVE.Nov 19, 1997 · N2148K · Bell 412SDR HEEA0012114Case Assy · corrodedCASE ASSY HAS EXCESSIVE CORROSION AT O'RING GROOVE AND LUGS. REPLACED WITH SERVICEABLE CASE.Nov 19, 1997 · N2148K · Bell 412SDR 97ZZZX4933Case · corrodedWHILE TROUBLESHOOTING FOR A LOOSE TAIL ROTOR GUARD IN TAIL ROTOR GEARBOX HOUSING, PULLED THE GUARD OUT OF THE GEARBOX AND FOUND FERTILIZER PACKED INTO CAVITY. WHILE SCRAPING FERTILIZER OUT OF CAVITY, FOUND CORROSION HAD EATEN THROUGH MAGNESIUM HOUSING. THE PNov 16, 1997 · N73953 · Bell 47G2A1SDR HEEA0011985Gear Box · failedINTERMEDIATE GR BOX MAKING METAL.Nov 13, 1997 · N81832 · Bolkms BO105SSDR HEEA0011958Chip Detector · shortedCHIP DETECTOR SHORTED LIGHT COMES ON WHEN INSTALLED.Nov 12, 1997 · N818SH · Bolkms BO105SSDR HEEA0011820Case Assy · corrodedCASE ASSY CORROSION ON MOUNTING FLANGE.Nov 7, 1997 · N107X · Bell 412SDR HEEA0011819Sleeve Assy · corrodedSLEEVE ASSY HAS CORROSION ON FLANGE AREA.Nov 7, 1997 · N21498 · Bell 412SDR HEEA0011793Bearing · separationBEARING SEPARATION.Nov 5, 1997 · N4000L · Snias AS350B2SDR HEEA0011761Seal · defectiveREPLACE SEAL AND PACKINGS.Nov 4, 1997 · N447PH · Bell 407SDR HEEA0011749Gear Box Assy · defectiveT/R GR BOX CHROME COMING OFF OUTPUT SHAFT.Oct 31, 1997 · N4000L · Snias AS350B2
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