# SDR AALA202604249265

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2026
- Submitted: April 24, 2026
- Operation: Air carrier
- Aircraft: [N188US](https://openairdocs.org/aircraft/N188US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1724
- Aircraft time: 76,976 hours, 29,786 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Control Unit
- Part number: E21327107
- Part serial: 8566
- Condition: Faulty
- Location: Zone 700
- Part time: 32,183 hours, 16,941 cycles
- Stage of operation: TX
- 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/AALA202604249265

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW REPORTED THAT THE BRAKES VERY SLOW TO RESPOND EVEN WITH MODERATE PEDAL PRESSURE. WHEN INCREASING PRESSURE BEYOND NORMAL PEDAL INPUT BRAKES WILL SURGE. MAINTENANCE REPLACED BCSU PER AMM 32-42-34 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.

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