# SDR DXTA2011120804819

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2011
- Submitted: December 8, 2011
- Operation: Air carrier
- Aircraft: [N452QS](https://openairdocs.org/aircraft/N452QS), registered now
- Make and model: Gulstm GIV
- Aircraft serial: 1352
- Aircraft time: 10,763 hours, 5,312 cycles
- System (JASC): [2916 · Hydraulic Reservoir, Main](https://openairdocs.org/jasc/2916)
- Part: Reservoir
- Condition: Leaking
- Location: Hyd System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O, D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2011120804819

## Discrepancy

AMBER "COMBINED HYD QUANTITY" CAS MESSAGE AT FL410.  THE COMBINED HYD SYS QTY INDICATION (EICAS) READS ZERO. THE FUSELAGE COMBINED SYS GAUGE ALSO READS ZERO. NO HYD FLUID FOUND IN EQUIPMENT BAY OR OUTSIDE FUSELAGE.  R & R THE COMBINED HYD RESEVOIR & FOUND SATISFACTORY.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.