# SDR AALA202402194237

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2024
- Submitted: February 19, 2024
- Operation: Air carrier
- Aircraft: [N176UW](https://openairdocs.org/aircraft/N176UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1499
- Aircraft time: 74,352 hours, 28,734 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Valve
- Part number: A254340063000
- Condition: Defective
- Location: Brakes
- Stage of operation: LD
- 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/AALA202402194237

## Discrepancy

AIRCRAFT WAS GROUNDED: ON LANDING, BRAKES APPLY PRESSURE UNEVENLY. RIGHT BRAKES HAVE SOFT PEDAL AND DO MOST OF THE BRAKING. SAME CONDITION DURING TAXI. MAINTENANCE REPLACED THE BRAKE DUAL SHUTTLE VALVE 2578GM (AALA202402190431) AND DUAL VALVE ALTERANTE BRAKE DISTRIBUTION VALVE 2577GM (AALA202402194237). A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS ACCOMPLISHED.

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