# SDR AALA202012049006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 2020
- Submitted: December 4, 2020
- Operation: Air carrier
- Aircraft: [N559UW](https://openairdocs.org/aircraft/N559UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5292
- Aircraft time: 26,911 hours, 10,712 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Accumulator
- Part number: 08825604644
- Part serial: 8681
- Condition: Low Pressure
- Location: Brake System
- Part time: 26,911 hours, 10,712 cycles
- Stage of operation: NR
- 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/AALA202012049006

## Discrepancy

AIRCRAFT WAS GROUNDED.  ON THIRD BRAKE APPLICATION LOW ACCUMULATOR PRESSURE WARNING IS TRIGGERED.  ONLY TWO BRAKE APPLICATIONS AVAILABLE.  SERVICED BRAKE ACCUMULATOR YELLOW SYSTEM, PER AMM 12-14-32-614-002-A, WAS FOUND AT 600 PSI SERVICED TO 970 PSI NO HELP.  LOW PRESSURE AFTER 2 APPLICATIONS.  BRAKE ACCUMULATOR REPLACED, PER AMM 29-13-42.

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