# SDR AWXA200300837

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2003
- Submitted: July 23, 2003
- Operation: Air carrier
- Aircraft: [N642AW](https://openairdocs.org/aircraft/N642AW), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 584
- Aircraft time: 28,190 hours, 1,119 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Selector
- Part number: A25461103
- Part serial: H99
- Condition: Bypassing
- Location: Hyd System
- Part time: 28,196 hours, 11,199 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: O, S, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AWXA200300837

## Discrepancy

NORMAL AND PARKING BRAKES FAILED AT GATE.  NORMAL BRAKES WERE APPLIED TO STOP AIRCRAFT, PARKING BRAKE WAS SET & STARTED TO SHUTDOWN NR 2 ENG WHEN AIRCRAFT STARTED TO ROLL.  NORMAL BRAKES REAPPLIED & PARKING BRAKE  RESET, AIRCRAFT STOPPED THEN STARTED TO ROLL AGAIN.  NORMAL BRAKES APPLIED WITH NO EFFECT, RECYCLED PARKING BRAKE WHILE FIRST OFFICER SHUTDOWN NR 1 ENG.  AIRCRAFT WAS CHOCKED AND STOPPED ROLLING.  MAINTENANCE TROUBLESHOT THE BRAKE SYSTEM AND FOUND GREEN HYDRAULIC SYSTEM MIGRATING TO YELLOW HYDRAULIC SYSTEM.  DURING T/S FOUND THERE WAS NO BRAKE PRESSURE WITH THE NR 1 ENG AND ONLY THE GREEN HYD SYS BEING USED.  REMOVED AND REPLACED AUTOMATIC SELECTOR VALVE, OPERATIONAL AND LEAK CHECKS WERE GOOD.

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