# SDR 95ZZZX2142

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N612RM](https://openairdocs.org/aircraft/N612RM), registered now
- Make and model: Skrsky S61N
- Aircraft serial: 61744
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Bearing
- Part number: SB3151A1B1
- Condition: Failed
- Location: Intermed Gearbox
- Stage of operation: CR
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX2142

## Discrepancy

DURING A ROUTINE CROSS-COUNTRY FLIGHT, AN UNUSUAL VIBRATION WAS FELT BY THE FLIGHT CREW AND A PRECAUTIONARY LANDING WAS MADE.  POST-FLIGHT INSPECTION FOUND THE OUTPUT HOUSING ON THE INTERMEDIATE GEARBOX WAS COMPLETELY BROKEN AROUND THE CIRCUMFERENCE, AT A POINT JUST BEHIND THE SB 3151A1 BEARING.  THIS BROKEN HOUSING NOW ROTATED WITH THE TAIL ROTOR DRIVE SHAFT INSTEAD OF BEING A FIXED PART.  SUSPECT BEARING FAILURE.

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