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A B737-400 was momentarily uncontrolled during pushback when the ground crew disconnected the towbar without first requesting and confirming the brakes were set by the flight crew.
| Attributes | |
| ACN | 955179 |
| Time | |
| Date | 201106 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Ground Event / Encounter Loss Of Aircraft Control |
Narrative:
We were ready for pushback; communications were established and after brake release the push crew began the job of moving the aircraft. The aircraft slowly came to a stop; and then shortly thereafter began moving again. The ground crew then said 'captain; you're rolling; the tug is unhooked.' there had been no communication requesting that the push was complete nor was I asked to set the brake. I heard nothing and the crew disconnected the towbar without my knowledge. This could have been catastrophic if the ramp had a grade that caused us to move forward and loss of life could have resulted. Also this scenario could easily have caused extensive aircraft damage. I believe the cause of this event was improper training of ground handlers.
Original NASA ASRS Text
Title: A B737-400 was momentarily uncontrolled during pushback when the ground crew disconnected the towbar without first requesting and confirming the brakes were set by the flight crew.
Narrative: We were ready for pushback; communications were established and after brake release the push crew began the job of moving the aircraft. The aircraft slowly came to a stop; and then shortly thereafter began moving again. The ground crew then said 'Captain; you're rolling; the tug is unhooked.' There had been no communication requesting that the push was complete nor was I asked to set the brake. I heard nothing and the crew disconnected the towbar without my knowledge. This could have been catastrophic if the ramp had a grade that caused us to move forward and loss of life could have resulted. Also this scenario could easily have caused extensive aircraft damage. I believe the cause of this event was improper training of ground handlers.
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.