# SDR USAA2011121400022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2011
- Submitted: December 14, 2011
- Operation: Air carrier
- Aircraft: [N768US](https://openairdocs.org/aircraft/N768US), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1389
- Aircraft time: 30,376 hours, 19,734 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Packing
- Part number: NAS16128
- Condition: Leaking
- Location: Hydraulic Sys
- Stage of operation: DE
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2011121400022

## Discrepancy

DURING DESCENT, ECAM YELLOW SYSTEM HYDRAULIC SYSTEM DROPPED TO ZERO.  EMERGENCY DECLARED.  FOUND LEAK AT UNION AT ALTERNATE BRAKE DUAL DISTRIBUTION VALVE.  REMOVED AND REPLACED UNION & PACKING IAW AMM 32-43-14.  LEAK CHECKED GOOD.  PERFORMED CHECK OF YELLOW SYSTEM & FILTERS IAW AMM 29-00-00-280-006-01.  NO FAULTS FOUND.  ADDED 3.5 GALLONS OF HYDRAULIC FLUID.

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