# SDR AALA202112272575

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 24, 2021
- Submitted: December 27, 2021
- Operation: Air carrier
- Aircraft: [N521UW](https://openairdocs.org/aircraft/N521UW), registered now
- Make and model: Airbus A300*
- Aircraft serial: 3944
- Aircraft time: 41,264 hours, 15,075 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Control Valve
- Part number: D24001000
- Part serial: Y02767
- Condition: Leaking
- Location: Zone 100 - Fuse
- Part time: 503,468 hours, 501,241 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202112272575

## Discrepancy

AIRCRAFT WAS GROUNDED: ON PUSH BACK AFTER ENG #2 START, SET PARKING BREAK AND LOST ALL PARK BRAKE AND ACCUMULATOR PRESSURE TURNED ON Y PUMP THEN OFF AND LOST BRAKES AFTER ONE APPLICATION. REPLACED PARKING BRAKE CONTROL VALVE 102GG AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER AMM 32-45-53.

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