# Service difficulty reports: JASC 6500

A list on [JASC 6500](https://openairdocs.org/jasc/6500.md).

Reports filed under 6500 · Tail Rotor Drive System, newest first.

Page 1 of 3 · 105 reports

- [SDR 2026FA0000555](https://openairdocs.org/sdr/2026FA0000555.md): Yoke · damaged · Jul 1, 2026 · N786AK · Robsin R44RAVENII
  > TAIL ROTOR DRIVE YOKE PN C908-1 REV K LOT 220 LOST A MAGNET THAT PHASES WITH THE HALL EFFECT SENSORS TO PROVIDE MAIN ROTOR RPM. THIS RESULTED IN THE FAILURE OF THE MAIN ROTOR RPM SYSTEM AND CAUSED AN ABORTED FLIGHT AND RECOVERY OF PASSENGERS WITH ANOTHER AIR
- [SDR QMLA2024062520068](https://openairdocs.org/sdr/QMLA2024062520068.md): Servo · noise · Jun 21, 2024 · N911AL · Bell 407
  > LOUD WHINING NOISE COMING FROM ABOVE AND AFT OF THE REAR FORWARD FACING SEATS. IT OCCURRED DURING A CLIMB AT MCP AND 60 KNOTS. AFTER TURNING AROUND AND LOWERING POWER TO RETURN TO BASE, THE NOISE SUBSIDED. REPLACED TR SERVO, RTS.
- [SDR QR9R2024051000001](https://openairdocs.org/sdr/QR9R2024051000001.md): Bearing · separated · May 10, 2024 · Bolkms BK117C2
  > THE RAD ANGULAR BALL BEARING INNER RACE FELL OUT DURING INSPECTION AND PREP FOR INSTALL.
- [SDR 2023FA0000810](https://openairdocs.org/sdr/2023FA0000810.md): Bushing · worn · Dec 5, 2023 · N383MD · Agusta AW139
  > DURING INSPECTION, FOUND TAIL ROTOR SLIDER BUSHING WORN BEYOND ALLOWABLE LIMITS. INSTALLED NEW BUSHING P/N 3G6430L00251, REF. AW139 AMP SECT. 64-31.
- [SDR 2023FA0000627](https://openairdocs.org/sdr/2023FA0000627.md): Blade · unknown · Jun 28, 2023 · N103CG · Hughes 500N
  > IN RNGARDS TO THE MD 500N HOLICOPTER, LHLS IS THE SECOND LIMO THAT I HAVE THE SAME ISSUE WITH THE NOTAR FAN BLADE ASSEMBLIES HAVING A STRANGO WEAR PALLERN ON THE SPAR PORTION OF THE BLADE ASSEMBLY. THESE FAN BLADES PIN: 500N5310-23 HAVO 3122.4 HRS TSN. NOT AL
- [SDR 2023FA0000626](https://openairdocs.org/sdr/2023FA0000626.md): Blade · unknown · Jun 28, 2023 · N520PD · Hughes 500N
  > THO 1.1O500N HERICOPLER HAS A 13 BLADED ANTI IOFQUO FAN (NOTAR FAN) INSTEAD DO TRND1TLONAL LAIL ROLET ASSY. THE NOTAR FAN NSSY'S PIN IS 500N5300-7. THO PIN OF LHE INN BLNDOS ORE 500N5310-23. THESE HAVO N SCRVICO LIFO OF 7500.0 HRS. THOSO FON BLNDE ASSOMBLLOS O
- [SDR QR9R2023062300002](https://openairdocs.org/sdr/QR9R2023062300002.md): Gearbox · making metal · Jun 23, 2023 · Bolkms BK117C2
  > DURING INSP A010, MAINTENANCE FOUND IGB MAGNETIC CHIP DETECTOR TO HAVE METALLIC CHIPS IN THE OIL COMPOSED OF CRITICLAL MATERIALS. REMOVED AND REPLACED INTERMEDIATE GEAR BOX IAW AMM 65-32-00, 4-1.
- [SDR 2022FA0000512](https://openairdocs.org/sdr/2022FA0000512.md): Cap · cracked · Sep 16, 2022 · N435LL · Urocop EC135P2
  > TAIL ROTOR HUB CAP HAS A CRACK ORIGINATING AT ONE OF THE HUB CAP CLAMP BOLTS AND TRAVELING OUTBOARD TO THE EDGE OF THE SKIN.
- [SDR QR9R20220505002](https://openairdocs.org/sdr/QR9R20220505002.md): Bearing · ratcheting · May 5, 2022 · Bolkms BK117C2
  > DURING INSTALLATION, MAINTENANCE DETECTED THE SLIDING SLEEVE ANGULAR BALL BEARING TO BE ROUGH AND RATCHETING. PART WAS RECEIVED NEW FROM AIRBUS.
- [SDR QR9R20220505001](https://openairdocs.org/sdr/QR9R20220505001.md): Bearing · ratcheting · May 5, 2022 · Bolkms BK117C2
  > DURING INSTALLATION, MAINTENANCE DETECTED THE SLIDING SLEEVE ANGULAR BALL BEARING TO BE ROUGH AND RATCHETING. PART WAS RECEIVED NEW FROM AIRBUS.
- [SDR QMLA2021855320041](https://openairdocs.org/sdr/QMLA2021855320041.md): Elastomer · cracked · Aug 9, 2021 · N491LG · Snias AS350B3
  > TAIL ROTOR PITCH CONTROL LINKS (P/N LB6-1231-3-2) ARE IN HIGH DEMAND DUE TO A VERY SHORT LIFE SPAN BEFORE THE LAMINATED BEARINGS SHOW CRACKS BEYOND LIMITS OUTLINED IN AMC EO 33-6520-EO-2481P2 AND AD 2021-05-09. THE LIFE SPAN RANGES GREATLY BETWEEN DIFFERENT L
- [SDR QR9R20210624001](https://openairdocs.org/sdr/QR9R20210624001.md): Actuator · leaking · Jun 24, 2021 · N547AE · Bolkms BK117C2
  > EXCESSIVE PLAY DETECTED AT THE TAIL ROTOR HYDRAULIC/YAW SEMA. SUBSEQUENT TROUBLESHOOTING REVEALED T/R ACTUATOR LEAKING AT WEEP HOLE.
- [SDR CA180510009](https://openairdocs.org/sdr/CA180510009.md): Bracket · cracked · May 10, 2018 · Bell 429
  > (CAN) DURING VISUAL INSPECTION, THE BRACKET P/N: 429-035-704-125, WHICH IS THE NUT PLATE HOLDER OF THE ATTACHMENT OF THE LOWER PART OF THE TAIL ROTOR GEARBOX COVER FAIRING, WAS FOUND CRACKED ON THE ENTIRE PORTION OF THE TOP LEG OF THE BRACKET. (TC# 2018051000
- [SDR QMLA2017100717103](https://openairdocs.org/sdr/QMLA2017100717103.md): Bearing · damaged · Oct 7, 2017 · N712GA · Bell 407
  > AFTER LANDING AND DURING ENGINE SHUT DOWN THERE WAS A PRONOUNCED VIBRATION. AFTER SHUT DOWN THERE WAS ENGINE OIL RUNNING OUT OF THE ENGINE OIL TANK. MAINTENANCE FOUND A CRACK IN THE ENGINE OIL TANK DRAIN VALVE BOSS WELD. UPON FURTHER INVESTIGATION ONE OF TH
- [SDR QMLA2017100717100](https://openairdocs.org/sdr/QMLA2017100717100.md): Oil Tank · cracked · Oct 7, 2017 · N712GA · Bell 407
  > AFTER LANDING AND DURING ENGINE SHUT DOWN, THERE WAS A PRONOUNCED VIBRATION. AFTER SHUT DOWN THERE WAS ENGINE OIL RUNNING OUT OF THE OIL TANK. MAINTENANCE FOUND A CRACK IN THE ENGINE OIL TANK DRAIN VALVE BOSS WELD. UPON FURTHER INVESTIGATION ONE OF THE TAI
- [SDR CA160126003](https://openairdocs.org/sdr/CA160126003.md): Hanger Assy · cracked · Jan 25, 2016 · Bell 212
  > (CAN) CRACKS WERE FOUND ON EACH BOLT HOLE THAT CONNECTS THE TAIL ROTOR DRIVESHAFT HANGER BEARING AND COUPLING ASSY, PN 212-040-600-009 TO THE TAIL BOOM HANGER FITTING BARREL NUTS.
- [SDR CA150918001](https://openairdocs.org/sdr/CA150918001.md): Cap · cracked · Sep 17, 2015 · Bell 407
  > (CAN) FREEWHEEL O/H CAP REQUIRED FPI IAW O/H CAP SENT TO AMO 45-13 CAP FAILED FPI, CRACK INDICATION.
- [SDR CA150616001](https://openairdocs.org/sdr/CA150616001.md): Bearing Support · cracked · Jun 4, 2015 · Bell 430
  > (CAN) THE FOLLOWING HAS BEEN REPORTED. POST A SEAL CHANGE ON THE ACFT, WHEN ROTATING THE ROTOR, THE ENGINEER HEARD A UNUSUAL SOUND IN THE TAIL BOOM AREA. AFTER INVESTIGATION, HE FOUND THE ABOVE TAIL ROTOR BEARING SUPPORT CRACKED & ALL BALLS ABSENT FROM THE O
- [SDR H44R201505040001](https://openairdocs.org/sdr/H44R201505040001.md): Lockwasher · cracked · Apr 21, 2015 · Bell 407
  > LOCK WASHER FOR THE AFT OIL COOLER BLOWER BEARING CRACKED ALLOWING THE RETENTION NUT TO LOOSE TORQUE, THE LOSS OF TORQUE ALLOWED THE SHAFT TO SPIN WITHIN THE BEARING AND THAT WAS THE SOURCE OF THE VIBRATION.
- [SDR 9EKA20150313012](https://openairdocs.org/sdr/9EKA20150313012.md): Spider · broken · Mar 13, 2015 · N814EH · Aerosp AS355*
  > LOST RT PEDAL IN FLIGHT. PERFORMED RUN ON LANDING.
- [SDR CA150225006](https://openairdocs.org/sdr/CA150225006.md): Shield · leaking · Feb 23, 2015 · Bell 205A1
  > (CAN) DURING DAILY INSPECTION, NOTICED THAT THE HANGER BEARING ASSEMBLY GREASE SHIELD WAS LEAKING. UNIT WAS REPLACED WITH SERVICEABLE, GND RUN CARRIED OUT & NO FURTHER FAULTS. ACFT RELEASED.
- [SDR CA141008014](https://openairdocs.org/sdr/CA141008014.md): Torque Tube · out of tolerance · Oct 8, 2014 · Snias AS350*
  > (CAN) ONE BORE OF HIGH TOLERANCE FLIGHT CONTROL LEVER FOUND TO BE OUT OF TOLERANCE AT NEW. MEASURED AT 8.6 MM, SHOULD BE 8.2MM. IF INSTALLED, THE LEVER WOULD MOST CERTAINLY OF FAILED. PN IS 350A27-2178-0601 FORM TRACKING NUMBER 10769896/13 NEW FROM AIRBUS HEL
- [SDR QMLA2013042213057](https://openairdocs.org/sdr/QMLA2013042213057.md): Disc Pack · cracked · Apr 22, 2013 · N408AM · Bell 407
  > AIRWORTHINESS INSPECTION FOUND TAIL ROTOR AFT SHORT SHAFT COUPLING DISC PACK CRACKED.
- [SDR E3MA201210160001](https://openairdocs.org/sdr/E3MA201210160001.md): Stator · cracked · Oct 15, 2012 · N527ME · Urocop EC135T2
  > DURING A ROUTINE AIRFRAME INSPECTION, A LONGITUDIONAL CRACK WAS DISCOVERED ON THE TOP SIDE OF A TAIL ROTOR STATOR.
- [SDR ALGA2012061202](https://openairdocs.org/sdr/ALGA2012061202.md): Flange · corroded · Jun 12, 2012 · N9YBOB · Bell 412
  > FLANGE, CORROSION BEYOND LIMITS.
- [SDR ALGA2012042603](https://openairdocs.org/sdr/ALGA2012042603.md): Blower · damaged · Apr 26, 2012 · N404AL · Bell 407
  > DURING COURSE OF REPAIR TO OIL COOLER BLOWER ASSY, FOUND AND REPLACED ONE SHAFT (407-040-320-103, SN A-3283), BEARING JOURNAL WORN BEYOND LIMITS. TWO NUTS (90-118-4) DAMAGED BEYOND LIMITS. ONE SHIELD (407-040-328-101) DAMAGED BEYOND LIMITS, ONE BEARING (407-
- [SDR CA120328006](https://openairdocs.org/sdr/CA120328006.md): Washer · worn · Mar 27, 2012 · Bell 206L1
  > (CAN) DURING 100-HR PERIODIC INSPECTION IT WAS NOTICED THAT THE TAIL ROTOR BELLCRANK AT THE END OF THE TAILBOOM WHICH ACTUATES THE PITCH CHANGE MECHANISM HAD A LARGE AMOUNT OF AXIAL PLAY CAUSING THE BELLCRANK TO "FLOAT" WITHIN ITS ATTACHMENT. UPON REMOVAL OF
- [SDR CA110815017](https://openairdocs.org/sdr/CA110815017.md): Control Tube · damaged · Aug 8, 2011 · Bell 212
  > (CAN) THIS CONTROL TUBE WAS REMOVED FROM THE AIRCRAFT AND AN INSPECTION WAS BEING CONDUCTED IN ACCORDANCE WITH B 212 MM CHAPTER 67 AND B 212 CR&O CHPATER 67. THE NYLATRON WEAR SLEEVES WERE REMOVED AND A RADIAL CRACK WAS REVEALED UNDER THE END SLEEVE. THE TUBE
- [SDR 2011FA0000183](https://openairdocs.org/sdr/2011FA0000183.md): Tail Rotor · damaged · Mar 18, 2011 · N958CP · Hughes 269C
  > ODOR OF BURNING LUBRICANT, EXCESSIVE VIBRATION, FORCED A SUCCESSFUL OFF AIRPORT LANDING. FOUND AFT "H" FRAME BEARING, PN 269A5050-56, SEIZED, OVERHEATED, DRIVESHAFT JAMMED FWD AGAINST BEARING, AFT BEARING SUPPORT BROKEN OFF FRAME, PN 269A5573-13, AND MISSING.
- [SDR AC2A0CF02162011](https://openairdocs.org/sdr/AC2A0CF02162011.md): Support · cracked · Feb 16, 2011 · N430CF · Bell 430
  > ON FINAL APPROACH TO HELIPORT, A MODERATE VIBRATION WAS FELT THOUGH THE PEDALS AND AIRFRAME. THE HELICOPTER WAS LANDED AND SHUTDOWN. FOUND EAR BROKEN OFF SUPPORT FOR BALANCE WEIGHTS.
- [SDR CA101105006](https://openairdocs.org/sdr/CA101105006.md): Swashplate · sheared · Nov 2, 2010 · Hughes 369D
  > (CAN) INSPECTION FOUND DRIVE SPLINES SHEARED OFF. HELICOPTER HAS NO HISTORY OF TAIL ROTOR STRIKE. INVESTIGATION INCLUDING ENGINEERING FAILURE ANALYSIS OF PART. OPERATORS FLEET INFORMED AND INSPECTED FOR SIMILAR PROBLEM. WILL FORWARD RESULTS.
- [SDR CA090702013](https://openairdocs.org/sdr/CA090702013.md): Fitting · cracked · Jul 1, 2009 · Bell 205A1
  > DURING A POST FLIGHT INSP, THE TAIL ROTOR DRIVE FITTING WAS FOUND CRACKED. TIME ON THE FITTING IS UNKNOWN. CRACK WAS FOUND RADIATING FROM THE BORE OF THE BARREL NUT ATTACHMENT. UNSURE IT THIS MAYBE THE CAUSE OF OVER TORQUING OF THE BOLT. NUT WAS REPLACED W
- [SDR CA090716009](https://openairdocs.org/sdr/CA090716009.md): Flex Coupling · cracked · Jun 10, 2009 · Snias AS350B2
  > PERFORMING A 30 HR INSP, A VISUAL INSP OF THE FWD TRANSMISSION DRIVE COUPLING, A CRACKED FLEX COUPLING WAS FOUND.
- [SDR CA081125005](https://openairdocs.org/sdr/CA081125005.md): Washer · cracked · Nov 24, 2008 · Bell 206B
  > (CAN) THE VERTICAL FIN WAS REMOVED TO FACILITATE SEAL REPLACEMENT OF THE PITCH CHANGE MECHANISM. THE RADIUS WASHERS THAT ARE USED ON THE VERTICAL FIN ATTACHMENT WERE INSPECTED, AND IT WAS NOTED THAT 3 OF THE 4 WASHERS HAD CRACKS ON THE OUTSIDE PERIMETER OF THE
- [SDR 2008FA0000890](https://openairdocs.org/sdr/2008FA0000890.md): Bearing · cracked · Nov 19, 2008 · N315LS · Bolkms BO105LSA3
  > MAIN TRANSMISSION WAS DELIVERED FOR O/H. THERE WAS NO NOTICE ABOUT AN INCIDENT OR A CHIP WARNING. CHIP DETECTOR AND OIL FILTER WERE CLEAN. AT THE BEGINNING OF THE DISASSEMBLY, THE MECHANIC NOTED THAT THE TAILROTOR DRIVE DID NOT MOVE WHEN THE INPUT FLANGE WAS
- [SDR 2008FA0000068](https://openairdocs.org/sdr/2008FA0000068.md): Shaft · cracked · Jan 30, 2008
  > ONE PIECE TRANSVERSE CRACK AROUND THE AREA OF PART THAT HAD LONGITUDINAL INDICATIONS (ORIGIN UNKNOWN BUT POSSIBLY RELATED TO STRESS, FATIGUE OR WEAR), OTHER 4 PIECES ONLY WITH THE SAME LONGITUDINAL INDICATIONS.
- [SDR 2007FA0000113](https://openairdocs.org/sdr/2007FA0000113.md): V-Belt · broken · Feb 5, 2007 · N113JD · Amtr EXEC162F
  > V BELT PREMATURELY FAILED. THIS IS A 250 HOUR CHANGE OUT PART.
- [SDR AC2A113672](https://openairdocs.org/sdr/AC2A113672.md): Coupling · cracked · Jan 20, 2007 · N5447C · Skrsky S76A
  > COUPLING WAS FOUND CRACKED ON 110 HR, AIRFRAME INSPECTION.
- [SDR AC2A112006](https://openairdocs.org/sdr/AC2A112006.md): Coupling · worn · Oct 31, 2006 · N139CW · Agusta AB139
  > GROOVE WORN IN SHANK, REPLACED COUPLING.
- [SDR AC2A110338](https://openairdocs.org/sdr/AC2A110338.md): Flex Coupling · cracked · Jul 19, 2006 · N5447C · Skrsky S76A
  > DISCOVERED CRACKED COUPLING DURING 50 HOUR INSPECTION. INSTALLED NEW COUPLING.
- [SDR KBM2006F00159](https://openairdocs.org/sdr/KBM2006F00159.md): Ball End · worn · Apr 11, 2006 · N884SH · Snias AS350B2
  > BALL END WORN, REMOVED AND REPLACED. (K)
- [SDR 2003FA0001118](https://openairdocs.org/sdr/2003FA0001118.md): Bearing · failed · Oct 17, 2003 · N25RX · Agusta A109
  > DURING ROUTINE DAILY INSPECTION OF HELICOPTER USED IN EMS, MECHANIC NOTICED NR 5 TAIL ROTOR BEARING GREASE SEAL HAD SEPARATED FROM BEARING. FRAGMENTS OF THE PHENOLIC BEARING CAGE WERE MISSING FROM BEARING ASSY. MECHANIC REPORTED NO EVIDENCE OF RESIDUAL GREAS
- [SDR BAQA086455](https://openairdocs.org/sdr/BAQA086455.md): Actuator · malfunctioned · May 19, 2003 · N1174U · Bolkms BK117B2
  > CAUSING SEVERE KICKING EVEN WITH YAW-CSAS DISENGAGED. SEALS LEAKING. REPLACED WITH SERVICEABLE UNIT.
- [SDR AC2A084144](https://openairdocs.org/sdr/AC2A084144.md): Restraint · debonded · Feb 7, 2003 · N430CH · Bell 430
  > SHEAR RESTRAINT IS DISBONDED. PIN IS SEPARATED FROM RUBBER. REPLACED SHEAR RESTRAINT.
- [SDR CA031210009](https://openairdocs.org/sdr/CA031210009.md): Housing · cracked · Jan 29, 2003 · Hughes 369D
  > (CAN) AT REMOVAL OF TRANSMISSION FROM AIRFRAME A SUSPECTED CRACK IN THE T/R O/P COVER AT THE OIL PRESSURE SENDING UNIT WAS NOTED. THIS AREA WAS PAINT STRIPPED AND THE AREA WAS NOT ONLY CRACKED IT HAD ALSO BEEN STOP DRILLED, FILLED WITH EPOXY AND PAINTED. THIS
- [SDR HEEA080447](https://openairdocs.org/sdr/HEEA080447.md): Bearing · worn · Jul 9, 2002 · N970AE · Snias AS350B
  > TAIL ROTOR LAMINATED HINGE BEARING WORN.
- [SDR 2002FA0000628](https://openairdocs.org/sdr/2002FA0000628.md): Belt · broken · Apr 8, 2002 · N21901 · Amtr ROTORWAYEXEC
  > CENTER TAIL ROTOR BELT FAILED RESULTING IN NO TAIL ROTOR CONTROL. BELT LIKELY FAILED DUE TO IMPROPER BELT ROUTING THROUGH TAILBOOM FROM ONE IDLER PULLEY TO NEXT IDLER PULLEY.
- [SDR CA011130006](https://openairdocs.org/sdr/CA011130006.md): Bearing · failed · Nov 24, 2001 · Bell 407
  > (CAN) WHILE ON 5TH SCENIC TOUR OF DAY, AT 2,500 FT ASL IN QUIET MODE CRUISE, A/C SOUND & VIBRATION LEVEL SUDDENLY CHANGED FROM NORMAL TO LOUD WITH HEAVY VIBRATION FROM TAIL ROTOR DRIVE AREA. PILOT IMMEDIATELY RETURNED A/C TO NORMAL MODE CRUISE RPM & EXITED SC
- [SDR HEEA076358](https://openairdocs.org/sdr/HEEA076358.md): Disc Pack · cracked · Oct 3, 2001 · N407PH · Bell 407
  > CRACKED. TO BE RETURNED TO BELL HELICOPTER TEXTRON FOR CREDIT AGAINST REPLACEMENT PART PURCHASED.
- [SDR HEEA076357](https://openairdocs.org/sdr/HEEA076357.md): Disc Pack · cracked · Oct 3, 2001 · N405PH · Bell 407
  > FWD COUPLING DISC ON NR 4 T/R SEGMENTED DRIVE SHAFT CRACKED.

Next page: https://openairdocs.org/jasc/6500/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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 = '6500'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/6500/reports

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