# SDR 97ZZZX5215

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N58251](https://openairdocs.org/aircraft/N58251), registered now
- Make and model: Hughes 369D
- Aircraft serial: 880317D
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Bearing
- Part number: 369D25420
- Condition: Galled
- Location: T/R Gearbox
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX5215

## Discrepancy

TAIL 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 MONTHS.  EXXON 2380 OIL USED.

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