# SDR USAA2011121500020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2011
- Submitted: February 10, 2012
- Operation: Air carrier
- Aircraft: N621AW
- Make and model: Airbus A320-231
- Registry model: [Airbus A320-231](https://openairdocs.org/model/airbus-industrie-a320-231) (OpenAirDocs)
- Aircraft serial: 53
- Aircraft time: 70,672 hours, 31,861 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Control Unit
- Part number: C202163392E34
- Part serial: 840
- Condition: Faulted
- Location: Brakes
- Part time: 52,147 hours, 21,004 cycles
- Stage of operation: LD
- 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/USAA2011121500020

## Discrepancy

AIRCRAFT LANDED WITH AUTO BRAKES SELECTED.  AFTER STARTING MANUAL BRAKING, BRAKES GRABBED VIOLENTLY THEN RELAEASED.  CREW RECEIVED ECAM BRAKES SYS 2 FAULT.  AFTER SHUTTING DOWN NR 2 ENGINE, ECAM CHANGED TO BRAKES SYS 1 FAULT.   REMOVED AND REPLACED THE BRAKE/STEERING CONTROL UNIT.

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