# SDR YV3R2021010500409

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 2020
- Submitted: January 5, 2021
- Operation: General aviation
- Aircraft: [N273S](https://openairdocs.org/aircraft/N273S), registered now
- Make and model: Robsin R44RAVENII
- Aircraft serial: 14283
- Aircraft time: 240 hours
- Engine: Lyc IO540AE1A5
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: O-Ring
- Part number: A215029
- Condition: Leaking
- Location: M/R Gearbox
- Part time: 240 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YV3R2021010500409

## Discrepancy

CUSTOMER REPORTED MAIN ROTOR GEARBOX PINION OUTPUT SPACER O-RING P/N: A215-029 WAS LEAKING.

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