# SDR UALA2011120806746

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2011
- Submitted: January 3, 2012
- Operation: Air carrier
- Aircraft: [N478UA](https://openairdocs.org/aircraft/N478UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1533
- Aircraft time: 34,470 hours, 14,914 cycles
- Engine: Iae V2527A5
- System (JASC): [3242 · Brake](https://openairdocs.org/jasc/3242)
- Part: Servo Valve
- Condition: Faulted
- Location: Brakes
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011120806746

## Discrepancy

WHEN GEAR WAS LOWERED, RECEIVED AN AUTO BRAKE FAULT ECAM MESSAGE.  CLEARED AFTER 2ND EXTENTION.  REPLACED NORMAL BRAKING SERVO VALVE, LEAK OP CHECKED NORMAL.

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