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A321 captain reported he had set the parking brake handle to the 'on' position while waiting in line for takeoff; but the aircraft still rolled forward; he used foot brakes to stop the aircraft. While cycling the parking brake handle multiple times; he noticed the lack of brake pressure on the yellow hydraulic system triple indicator. Aircraft was taxied back to gate.
| Attributes | |
| ACN | 1114326 |
| Time | |
| Date | 201309 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | A321 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Parking Brake |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Taxi out for takeoff; made several stops and set parking brake prior to incident. [While] on taxiway; in line for takeoff with parking brake set; the aircraft rolled with the parking brake handle in the 'on' position. Stopped the aircraft with foot brakes. Cycled the parking brake handle multiple times with no brake pressure indication. Returned to the gate and made a logbook entry. The parking brake returned to normal operation with the engines shut down. Gate turnback. Mechanical.
Original NASA ASRS Text
Title: A321 Captain reported he had set the parking brake handle to the 'On' position while waiting in line for takeoff; but the aircraft still rolled forward; he used foot brakes to stop the aircraft. While cycling the parking brake handle multiple times; he noticed the lack of brake pressure on the Yellow Hydraulic System Triple Indicator. Aircraft was taxied back to gate.
Narrative: Taxi out for takeoff; made several stops and set parking brake prior to incident. [While] on taxiway; in line for takeoff with parking brake set; the aircraft rolled with the parking brake handle in the 'On' position. Stopped the aircraft with foot brakes. Cycled the parking brake handle multiple times with no brake pressure indication. Returned to the gate and made a logbook entry. The parking brake returned to normal operation with the engines shut down. Gate turnback. Mechanical.
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.