# SDR 97ZZZX3929

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 29, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N31AS](https://openairdocs.org/aircraft/N31AS), registered now
- Make and model: Snias AS350B2
- Aircraft serial: 2689
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Bearing
- Part number: 350A33215300
- Condition: Worn
- Location: T/R Gearbox
- Part time: 431 hours
- Stage of operation: IN
- Nature of condition: E
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX3929

## Discrepancy

HIGH FREQUENCY DEVELOPED IN TAIL ROTOR, BEARING SET WORN.  REPLACED WITH HEX BEARING SET.

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