# SDR USAA2011122900015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2011
- Submitted: December 29, 2011
- Operation: Air carrier
- Aircraft: [N629AW](https://openairdocs.org/aircraft/N629AW), registered now
- Make and model: Airbus A320-231
- Registry model: [Airbus A320-231](https://openairdocs.org/model/airbus-industrie-a320-231) (OpenAirDocs)
- Aircraft serial: 76
- Aircraft time: 70,618 hours, 31,570 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Control Unit
- Part number: C202163392E34
- Part serial: 005062
- Condition: Faulty
- Location: Landing Gear
- Part time: 37,055 hours, 15,593 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2011122900015

## Discrepancy

BRAKES PULSED WHEN APPLIED AT SLOW TAXI SPEEDS, AND MORE BRAKE PEDAL TRAVEL WAS REQUIRED TO STOP AIRCRAFT.  BSCU FAULT NR 1 CHANNEL IN PREVIOUS LEG'S REPORT.  REMOVED AND REPLACED BRAKE / STEERING CONTROL UNIT.  PERFORMED MAINTENANCE TAXI AND BRAKING CHECK IN NORMAL AND ALTERNATE MODES WITH NO BRAKE PULSING, SURGING OR GRABBING OBSERVED.

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