Regional Jet 200 ER/LR (CRJ200)
Maintenance Airframe; Maintenance Powerplant
Communication Breakdown; Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance; Ground Event / Encounter Aircraft
Aircraft Aircraft Damaged; General Maintenance Action
Airport; Human Factors; Equipment / Tooling
I was asked to take [the aircraft] to the gate. Boarded aircraft got plane ready to go to gate. Tug driver gave signal to release brakes. Release brakes seen wing walker go to right. Plane is backed out of hangar; got APU running so I would have brakes. Plane was pushed back then we stopped; heard loud crash.
We began to push [the aircraft] out of the hangar for a gate. I was tug driver and [another maintenance technician was] right wing walker. The aircraft was pushed out of the hangar and due to the incline of the ramp entering the hangar the plane/tug picked up a little speed. This caused [the wing walker] to fall behind the plane where he lost visibility. I began to turn to angle the aircraft for departure to the gate when the right wing O/B (outboard) flap struck the lower fuselage below the F/O's (First Officers) side of [the other aircraft]; ultimately with the flap of lodging into the nose gear of [the other aircraft].
Four air carrier Maintenance Technicians reported that when pushing a CRJ-200 out of the hangar they lost control and the aircraft made contact with another aircraft.