# SDR AALA201707079002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2017
- Submitted: July 10, 2017
- Operation: Air carrier
- Aircraft: [N905AU](https://openairdocs.org/aircraft/N905AU), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7700
- Aircraft time: 18 hours, 5 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Control Unit
- Part number: E21328002
- Condition: Failed
- Location: Brake System
- Stage of operation: AP
- 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/AALA201707079002

## Discrepancy

WHEN GEAR SELECTED DOWN, ECAM MESSAGE BRAKES NORMAL BRAKE FAULT APPEARED.  STATUS SHOWED NORMAL BRAKE FAILURE AND AUTO BRAKE FAILURE. REPLACED ALTERNATE BRAKE CONTROL UNIT IAW MM 32-43-34.

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