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An A320 flight crew failed to insure the parking brake was set prior to clearing the ground crew to disconnect the tow bar. A weak interphone system and the flight crew's preoccupation with briefing special takeoff procedures during the pushback contributed.
| Attributes | |
| ACN | 904764 |
| Time | |
| Date | 201008 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Interphone System |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 150 Flight Crew Total 8000 Flight Crew Type 600 |
| Person 2 | |
| Function | Pilot Flying First Officer |
| Experience | Flight Crew Last 90 Days 270 Flight Crew Total 14000 Flight Crew Type 1000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Ground Event / Encounter Vehicle Ground Event / Encounter Person / Animal / Bird |
Narrative:
When ground person hooked up to the interphone; it was very weak and I had to ask several times during push back process to 'say again'. Push back was normal until after the clear to start engines clearance was given. The first officer and I were discussing t-procedure and terrain issues; during which time I heard the tug driver talk. Thinking (incorrectly) it was at the point during push back that the response was to 'disconnect headset' I said that to the tug driver. When I saw tug driver back away from airplane I noticed the plane start to roll forward. The plane rolled several inches to about 1 ft as near as I could tell when I immediately applied brakes and stopped the airplane. At that point the normal 'salute and release from guidance' procedure was accomplished and we taxied out. Thank god no one was injured and no equipment was damaged. Fatigue was a factor due to previous long duty days on this identification. I think the low volume during the push back was also a factor; otherwise it would have more obvious what point in the push back that we were in.
Original NASA ASRS Text
Title: An A320 flight crew failed to insure the parking brake was set prior to clearing the ground crew to disconnect the tow bar. A weak interphone system and the flight crew's preoccupation with briefing special takeoff procedures during the pushback contributed.
Narrative: When ground person hooked up to the interphone; it was very weak and I had to ask several times during push back process to 'say again'. Push back was normal until after the clear to start engines clearance was given. The First Officer and I were discussing T-procedure and terrain issues; during which time I heard the tug driver talk. Thinking (incorrectly) it was at the point during push back that the response was to 'disconnect headset' I said that to the tug driver. When I saw tug driver back away from airplane I noticed the plane start to roll forward. The plane rolled several inches to about 1 FT as near as I could tell when I immediately applied brakes and stopped the airplane. At that point the normal 'salute and release from guidance' procedure was accomplished and we taxied out. Thank God no one was injured and no equipment was damaged. Fatigue was a factor due to previous long duty days on this ID. I think the low volume during the push back was also a factor; otherwise it would have more obvious what point in the push back that we were in.
Data retrieved from NASA's ASRS site as of April 2012 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.