# SDR LN4R2013012962866

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 10, 2013
- Submitted: January 29, 2013
- Operation: General aviation
- Filed by: [Learjet Inc, repair station LN4R342M](https://openairdocs.org/faa-repair-station/LN4R342M/learjet-inc.md) (OpenAirDocs)
- Aircraft: [N999LB](https://openairdocs.org/aircraft/N999LB), registered now
- Make and model: Lear 45LEAR
- Aircraft serial: 429
- Aircraft time: 280 hours, 160 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Condition: Cut
- Location: Hyd System
- Stage of operation: IN
- How discovered: V
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/LN4R2013012962866

## Discrepancy

LOSS OF HYDRAULIC FLUID DURING FLIGHT. FOUND O-RING CUT.

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