# SDR ERAA074616

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 13, 2001
- Submitted: July 23, 2001
- Operation: General aviation
- Aircraft: N290EH
- Make and model: Bolkms BO105A
- Aircraft serial: S850
- Aircraft time: 6,005 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Transmission
- Part number: 4638001007
- Part serial: 911
- Condition: Contaminated
- Location: Main Rotor
- Part time: 12,460 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ERAA074616

## Discrepancy

TRANSMISSION IS CONTAMINATED BY TRASH FROM OIL COOLER.  REMOVED ALL OIL JETS TO FLUSH OUT ALL OIL PASSAGES.   REMOVED TOP CASE & CENTER HOUSING, CLEANED AND FLUSHED ALL OIL JETS AND OIL PASSAGES, REPAIRED ACCEDSSORY DRIVE, REASSEMBLED TRANSMISSION WITH NEW O-RINGS IAW REM 103.

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