A similar incident happened to a 777 years ago, in that particular case the thrust levers were not at idle they had been moved (after all checklists/flows were complete) to rectify and unrelated maintenance issue, crew failed to notice the position (human factors) Eng 2 started first, reached idle and rapidly accelerated to a high thrust, broke the tow bar and the A/C moved forward and yawed left instantly due to the asymmetric thrust thereby missing the tug with the nose gear, also the tug now accelerated towards the aircraft or engine. The crew were able to stop the aircraft before contacting the tug, had it been powered by GE90-115 maybe they would have hit the tug.
My guess is its a similar incident, and questions asked as to the reason for the thrust increase, thrust lever position or EEC fault?
Last edited by SMOC; 1st May 2013 at 21:16.