A330
Situational Awareness; Workload
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Object
Aircraft Aircraft Damaged; General Maintenance Action
Human Factors; Procedure; Staffing
[I] arrived at work and was assigned to move 2 aircraft. There an A330 in front of the hanger blocking the exit of the aircraft in the hanger that needed to be brought out. Moved first aircraft to taxiway Uniform and returned with tow bar; left tug and 2 mechanics at aircraft; since it was coming into hanger next. At aircraft in the hanger; Brake rider was in place and stairs were pulled; left tow bar at nose and went to retrieve other tug. Hooked up tug and another mechanic started walking toward left wing. Brake rider said; 'Brakes off' another mechanic jumped onto the tug and I started backing aircraft out of the hanger. The wings were never in the hanger. During backing; noticed [another aircraft] nosed toward Heavy Maintenance hangar and I shifted my focus on clearing the tail of the 321 and made slight adjustment to correct to aircraft right. Then seen mechanic waving arms and stopped. The aircraft wings were never inside the hanger so was thinking only needed one mechanic to watch the tail. Hardly ever is a 330 in the hanger and even rarer then that is it backed into hanger. So I knew it was a 330 just forgot and wings were clear easy push. Do more like heavy maintenance for their aircraft positioning into the hanger. Always have at least 5 people to move aircraft out of a hanger or it's a no-go.
I was told by manager to have aircraft moved; among other requests. Second of three Leads who was responsible for the 'Moves' had only 1 Supertug and needed 2 taxi qualified AMTs and a chock/safety AMT for moves requested by Tower (we began immediately reacting prior to and immediately after shift start). A 3rd Lead was coming in on OT; 'Late call' and hadn't arrived. I assigned the AMT's immediately available and 3 other of 5 other AMTs 'working on the 2 AC' 1 additional AMT jumped in and volunteered to help making it 7 actively involved AMTs and 1 assigned (unsure of his activity) and awaiting arrival of 2 more that arrived as [the aircraft] hit the building (total of 10 AMTs to move 2 AC...ONE AC AT A TIME). 'Why' is better left to those involved directly with the incident. I was not involved. Utilize TTWS (Tow Team Warning System) with a minimum of 3 (1 for each wing & 1 for the tail/engines) ground 'walkers'. Most importantly be conscious of and clear the tail on the A330 in the Line Hangar.
Maintenance personnel reported contacting the hanger during move of an A330.