# SDR 2023FA0000809

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2023
- Submitted: December 5, 2023
- Operation: General aviation
- Aircraft: [N553XB](https://openairdocs.org/aircraft/N553XB), registered now
- Make and model: Skrsky S76D
- Aircraft serial: 761019
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Seal
- Part number: SB8209103
- Condition: Failed
- Location: M/R Gb
- Component: Main Gearbox
- Component part number: 7635109600046
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023FA0000809

## Discrepancy

DURING INSPECTION FOUND MGB LOWER MAST SEAL IS LEAKING.

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