# SDR 97ZZZX4832

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N492HL
- Make and model: Bolkms BO105CBS
- Aircraft serial: S803
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Bearing
- Part number: 4638302024
- Condition: Spalled
- Location: M/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/97ZZZX4832

## Discrepancy

TRANSMISSION RECEIVED FOR METAL IN OIL.  INSPECTION REVEALED NOTHING ABNORMAL EXCEPT LT INPUT PINION AND 4638-302-024 BEARING HAD A FEW SLIGHT DENTS OR MARKS IN ROLLERS AND ROLLER PATH ON PINION.  BEARING WAS CUT APART AND THE OUTER RACE WAS FOUND VERY SPALLED.  REPAIRED TRANSMISSION.  REPLACED BEARING.

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