# SDR USAA2012050400012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2012
- Submitted: June 19, 2012
- Operation: Air carrier
- Aircraft: [N121UW](https://openairdocs.org/aircraft/N121UW), registered now
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 1294
- Aircraft time: 37,101 hours, 16,385 cycles
- System (JASC): [3242 · Brake](https://openairdocs.org/jasc/3242)
- Part: Control Unit
- Part number: E21327106
- Part serial: 7850
- Condition: Unreliable
- Location: Brakes
- Part time: 16 hours, 8 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2012050400012

## Discrepancy

CREW RECEIVED 'AUTO BRAKE FAULT / BRAKES RELEASED' ECAM MESSAGE EN ROUTE TO GCM.  CREW ELECTED TO DECLARE AN EMERGENCY AND RETURNED TO DEPARTURE.  REMOVED AND REPLACED THE BRAKE/STEERING CONTROL UNIT.  CONTROL UNIT SENT TO REPAIR VENDOR AND DECLARED 'NO FAULT FOUND'. AIRCRAFT HAS HAD ONE REPEAT BRAKE FAULT TO DATE WHICH WAS RESET WITH NO FURTHER ISSUES.

---
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.