# SDR USAA2009061191460

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 10, 2009
- Submitted: June 11, 2009
- Operation: Air carrier
- Aircraft: [N122US](https://openairdocs.org/aircraft/N122US), registered now
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 1298
- Aircraft time: 28,792 hours, 12,536 cycles
- System (JASC): [3243 · Master Cylinder/Brake Valve](https://openairdocs.org/jasc/3243)
- Part: O-Ring
- Condition: Leaking
- Location: Brake System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2009061191460

## Discrepancy

FLT 977 CLT-PDX - RETURN TO FIELD - CREW REPORTED LOSS OF YELLOW HYDRAULIC SYSTEM.  AIRCRAFT RETURNED TO CLT AND LANDED WITHOUT FURTHER INCIDENT.  MAINTENANCE REPLACED O-RING ON BRAKE AUTOMATIC SELECTOR 2576GM.  SERVICED SYSTEM AND OPERATED WITH NO LEAKS NOTED.

---
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.