# SDR AAL2025F00002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 2025
- Submitted: April 28, 2025
- Operation: Air carrier
- Aircraft: [N904AA](https://openairdocs.org/aircraft/N904AA), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7613
- Aircraft time: 24,488 hours, 9,687 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Servo Valve
- Part number: E213260002
- Condition: Faulted
- Location: Zone 700
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AAL2025F00002

## Discrepancy

AIRCRAFT WAS GROUNDED: WHILE TAXIING OUT FELT A SURGE IN THE BRAKES FOLLOWED BY A NORMAL BRAKES SYSTEM FAULT ECAM, MAINTENANCE REPLACED SERVOVALVE 16GG AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 32-42-48.

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