Event Sequence
During pushback operations with all engines operating and the airplane's brakes applied, the ground crew reported difficulty disconnecting the tow bar from the airplane. In response to a request from the ground crew, the flightcrew released the brakes. The tow bar was then disconnected first from the airplane and subsequently from the tug.
While a ground crewmember was reconnecting the tow bar to the tug, he observed the airplane moving forward and advised the captain to apply the brakes. The airplane then collided with the tug.
Ground Crew Actions
The ground crew initially faced difficulty disconnecting the tow bar from the airplane. After the brakes were released, they successfully disconnected the tow bar from both the airplane and the tug. The ground crewmember was in the process of reattaching the tow bar to the tug when he noticed the airplane moving forward and issued a warning to the flightcrew.
Aftermath
The collision resulted in contact between the airplane and the tug. The source does not provide additional details regarding damage or injuries.