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 HCMA062019Bearing · mismanufacturedBEARING KIT SHIPPED INCOMPLETE; THEREFORE, IS UNUSABLE.Feb 16, 1999SDR HEEA060487Gearbox · frozenT/R TRUNNION FROZEN ON OUTPUT SHAFT AND INPUT SEAL LEAKS.Feb 9, 1999 · N406PH · Bell 407SDR 99ZZZX841Gear · mismanufacturedGEAR SET REJECTED NEW OUT-OF-BOX. UNABLE TO OBTAIN GOOD GEAR PATTERN. TRIED ON 2 SEPARATE GEARBOXES WITHOUT SUCCESS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Feb 1, 1999 · N93LG · Snias AS350B2SDR CA990308039Driveshaft · misaligned(CAN) MISALIGNMENT OF DRIVESHAFT AND TAIL ROTOR GEARBOX CAUSING INPUT GEAR PREMATURE WEAR.Jan 30, 1999 · Bell 206LSDR HEEA060231Bearing · pittedWATER DAMAGE CAUSING PITTING ON BEARING INNER RACE. REPLACED OUTPUT SEAL AND BEARING AND SHAFT.Jan 22, 1999 · N3892R · Bell 206L1SDR CA990125018Gearbox · corroded(CAN) FOUND THREE AREAS OF DEEP CORROSION IN THE MAGNESIUM CASE NEAR THE UPPER GEARBOX MOUNTS.Jan 7, 1999 · Bolkms BO105CSDR HCMA0000223Hinge · wornHINGE IS WORN BEYOND LIMITS. (X)Nov 6, 1998 · N422B · Snias AS350BASDR HEEA0016490Gearbox · leakingSEAL LEAKS, EXCESSIVE CORROSION ON MAIN CASE.Oct 27, 1998 · N141PH · Bell 412SDR HCMA0000218Hinge Laminate · tornHINGE LAMINATE IS TORN BEYOND LIMITS AND THERE IS NO 'J' GAP. (X)Oct 27, 1998 · N992BH · Snias AS350B2SDR AU981408Support · cracked(AUS) TAIL ROTOR GEARBOX SUPPORT CRACKED ON LT SIDE. CRACK STARTS AT A COUNTERSUNK RIVET AND RUNS THROUGH TO THE UPPER SKIN EDGE. SUBMITTER SUSPECTS CAUSED BY INCORRECT SHIMMING BETWEEN THE SKIN AND THE BELLCRANK LONGERON.Oct 26, 1998 · Bell 206L1SDR CA981027012Pitch Link · wrong part(CAN) RECEIVED O/H TAIL ROTOR GEARBOX AND T/R PITCH CONTROL ASSY HAD R22 T/R PITCH LINKS P/N B345-1 INSTALLED INSTEAD OF R44 P/N B345-2. THIS UNIT HAD BEEN O/H AT THE MANUFACTURER.Oct 20, 1998 · Robsin R44SDR HCMA0000220Hinge Laminate · crackedRUBBER IS CRACKED BEYOND LIMITS. (X)Oct 11, 1998 · N193BH · Snias AS350B2SDR HEEA0016126Boot · leakingBOOT SWOLLEN AND LEAKING GREASE. ALSO REMOVED TRUNNION ASSY P/N 206-011-728-001, DUE TO SPINDLES WORN BEYOND LIMITS. ALSO REMOVED BEARINGS P/N MS27641-5 DUE TO TRUNNION SPINDLE SEAT WORN BEYOND LIMITS.Oct 6, 1998 · N407MM · Bell 407SDR HCMA0000215Hinge Laminate · tornHINGE IS TORN BEYOND LIMITS. (X)Sep 30, 1998 · N312B · Snias AS350BSDR HCMA0000222Hinge Laminate · cutHINGE IS WORN AND CUT BEYOND LIMITS. (X)Sep 28, 1998 · N196BH · Snias AS350B2SDR HCMA0000214Hinge · tornHINGE IS TORN BEYOND LIMITS. (X)Sep 28, 1998 · N196BH · Snias AS350B2SDR AU981230Gearbox · faulty(AUS) TAIL ROTOR GEARBOX OIL DIRTY. OIL CHANGED BUT AGAIN BECAME DIRTY. GEARBOX CHANGED.Sep 20, 1998 · Bell 412SDR HEEA0016000Boot · deterioratedBOOT DETERIORATED, LINERS LOOSE ON TRUNNION AND BEARINGS WORN. REPAIRED.Sep 9, 1998 · N141MA · Bell 407SDR HEEA0015989Gearbox · making metalTAIL ROTOR GEARBOX MAKING METAL.Sep 4, 1998 · N6097Z · Snias AS350B2SDR HEEA0015975Seal · leakingSEAL LEAKING ON TAIL ROTOR GEARBOX.Sep 4, 1998 · N403PH · Bell 407SDR AU981141Mount · cracked(AUS) TAIL ROTOR GEARBOX MOUNT FORGING CRACKED IN AREA OF THE LEFT REAR STUD HOLE. PART TC: 10,168.Sep 2, 1998 · Bell 206BSDR HEEA0015942Shaft · mismanufacturedMISMANUFACTURED. CANNOT INSTALL TAIL ROTOR RETENTION NUT, THREADS DEFECTIVE. SUSPECT THREADS NOT CUT DEEP ENOUGH.Sep 1, 1998 · Bell 206L1SDR HCMA0000217Hinge Laminate · tornHINGE LAMINATE IS TORN BEYOND LIMITS. (X)Aug 21, 1998 · N992BH · Snias AS350B2SDR 98ZZZX3506Gearbox · failedGEARBOX WAS REMOVED FOR REPAIR AT EUROCOPTER CANADA LTD. THEY REPLACED ALL BEARINGS AND RETURNED THE REPAIRED GEARBOX. PART WAS INSTALLED IN ACFT AND DURING SUBSEQUENT GROUND MAINTENANCE RUNS, CHIPS APPEARED ON THE CHIP PLUG. ACFT NEVER GOT AIRBORNE. REMOVAug 17, 1998 · N90752 · Bolkms BO105CSDR HEEA0015609Case Assy · corrodedT/R GEARBOX SIGHT GLASS BORE, MOUNTING HOLE AND SURFACE OF MOUNTING SEAT ARE CORRODED.Aug 14, 1998 · Bell 212SDR CA980825016Cover · cracked(CAN) AFTER LANDING, AS M/R RPM DECREASING THROUGH 300 RPM, UNUSUAL TAIL ROTOR VIBRATION FOLLOWED BY T/R CHIP LIGHT. T/R GEARBOX CHANGED. OIL DRAINED FROM GEARBOX CONTAINED MINUTE AMOUNT OF FERROUS AND A LOT OF NON-FERROUS METAL PARTICLES. DISASSEMBLY REVEAAug 11, 1998 · Snias AS350BASDR AU980965Gearbox · malfunctioned(AUS) TAIL ROTOR GEARBOX FAULTY. GEARBOX OIL BLACK. EVIDENCE OF GEAR SLIPPAGE.Aug 6, 1998 · Robsin R22ALPHASDR AU980922Gearbox · contaminated(AUS) TAIL ROTOR GEARBOX CHIP DETECTOR CONTAINED SMALL METAL FLAKES.Jul 30, 1998 · Robsin R22BETASDR HCMA0000206Bearing · wornT/R DRIVE BEARING WORN BEYOND LIMITS; TORN.Jul 23, 1998 · N972BH · Snias AS350B2SDR HEEA0015201Cover · corrodedCORROSION IN THREADED BOLT HOLES. REPLACED WITH SERVICEABLE COVER.Jul 17, 1998 · N818SH · Bolkms BO105SSDR 98ZZZX2791Gearbox · crackedDURING 150-HOUR ZONE INSPECTION, FOUND APPROXIMATELY 2 INCH CRACK IN GEARBOX HOUSING NEAR INPUT SIDE. CRACK WAS NOT NEAR ANY MOUNTING BOSS, STUD OR HOLE. CRACK WAS ALMOST UNDETECTABLE BY VISUAL MEANS. MECHANIC FOUND CRACK BY WIPING CASE DOWN WITH SOLVENT ANJul 17, 1998 · N780P · Skrsky S76BSDR HCMA0000204Bearing · wornTAIL ROTOR DRIVE IS WORN EXCESSIVELY. (X)Jul 13, 1998 · N752BH · Snias AS350BSDR HCMA0000216Hinge Laminate · tornHINGE LAMINATE IS TORN BEYOND LIMITS. (X)Jul 1, 1998 · N992BH · Snias AS350B2SDR HEEA0015038Spider · wornTAIL ROTOR BEARING, SEAL AND GUIDE WORN.Jun 26, 1998 · N4000L · Snias AS350B2SDR HEEA0014980Seal · leakingTAIL ROTOR GEARBOX INPUT SEAL LEAKING.Jun 24, 1998 · N437PH · Bell 407SDR HEEA0014951Bearing · roughROUGH TAIL ROTOR BEARINGS. SERIAL NUMBERS REMOVED ARE M96-1203 AND M96-1395.Jun 23, 1998 · N405PH · Bell 407SDR HEEA0014828Bearing · damagedRUBBER SEPARATION AT TAIL ROTOR.Jun 19, 1998 · N6097Z · Snias AS350B2SDR HEEA0014792Adapter · inoperativeTAIL ROTOR SPLINE'S ADAPTER IS INOPERATIVE.Jun 17, 1998 · N407PH · Bell 407SDR HEEA0014726Bevel Gear · spalledMETAL IN OIL. FOUND BEVEL GEAR SET SPALDING AND ROLLOVER ON ALL BEARINGS. REPLACED WITH NEW GEAR SET.Jun 11, 1998 · N4294R · Bolkms BO105SSDR 98ZZZX2885Boot · leakingHOLE IN BOOT ALLOWING OIL AND GREASE TO FLOW OUT. SEALS 2 EACH B56-40-2 AND ONE EACH 26001-7023 WERE REPLACED DUE TO LEAKING.Jun 10, 1998 · N407PR · Bell 407SDR HCMA0000209Hinge · delaminatedRUBBER IS TORN BEYOND LIMITS AND THERE IS NO J-GAP. (X)Jun 8, 1998 · N193BH · Snias AS350B2SDR HCMA0000207Hinge · delaminatedPART IS TORN BEYOND LIMITS AND THERE IS NO J-GAP. (X)Jun 7, 1998 · N422B · Snias AS350BASDR AU980783Seal · leaking(AUS) TAIL ROTOR GEARBOX INPUT SEAL LEAKING. PART TOTAL CYCLES: 27.Jun 5, 1998 · Bell 206B3SDR HEEA0014437Seal · leakingT/R GEARBOX SEAL LEAKING.Jun 1, 1998 · N405PH · Bell 407SDR HEEA0014436Bearing · wornT/R HAS WORN BEARING.Jun 1, 1998 · N6097Z · Snias AS350B2SDR CA980602031Bevel Gear · broken(CAN) ON FIRE FIGHTING MISSION, 90 DEGREE CHIP LIGHT ON. AFTER LANDING, CHIP PLUG WAS HEAVILY CONTAMINATED. INPUT GEAR 212-040-450-001 S/N A13-02363 HAD BROKEN TEETH, BEVEL GEAR 212-040-451-001 S/N A13-03609 HAD BROKEN TEETH, G/B HOUSING 212-040-468-001 S/N AMay 29, 1998 · Bell 205A1SDR HEEA0014299Bearing · crackedT/R GEARBOX BEARINGS CRACKED.May 22, 1998 · N230UN · Bell 230SDR HEEA0014241Housing · mismanufacturedT/R CONTROL HOUSING MISMANUFACTURED. THE BORE OF THE MS27641-4 BEARING IS NOT MACHINED ENOUGH ON ONE SIDE.May 19, 1998 · N437PH · Bell 407SDR HEEA0014221Seal · mismanufacturedSEAL MISMANUFACTURED. 2 PART "B" SENT IN PACK.May 19, 1998 · Bell 407SDR CA980603013Pin · misinstalled(CAN) ON REPLACEMENT OF THE T/R GEARBOX, THE T/R CROSSHEAD HAD EXCESSIVE ROTATIONAL MOVEMENT. THE PIN USED TO LOCATE THE PITCH CHANGE ROD WITHIN THE OUTPUT SHAFT HAD NOT BEEN INSTALLED CORRECTLY THROUGH THE KEY WITHIN THE ROD.May 16, 1998 · Bell 206L
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