Commercial Fixed Wing
Communication Breakdown; Situational Awareness
Deviation / Discrepancy - Procedural Maintenance; Ground Event / Encounter Object
Aircraft Aircraft Damaged; General Maintenance Action
Human Factors; Equipment / Tooling
We were assigned to an ETOPS PDC and to also troubleshoot 3 hydraulic leaks that were documented in the logbook. We positioned the stand using a spotter to get in place under the left trailing edge flap area. We proceeded to raise the stand in place; and through communication with the cockpit with handheld radios; we asked him to drop down the flaps. With the flaps at full extension; we proceeded to inspect for leaks. I was on the inboard side of the flaps; and my partner was on the outside portion. She saw something leaking and asked me to come over and look at it. The hydraulics were still on at that point. I went to the outboard to look at it with her; and at that point; we heard a noise. We went and looked back at the inboard side; and saw a flap had touched the lift and caused damage. We then tried to drop down lift; and it would not start. We asked the man in the cockpit to raise the flaps; and he did so. He then came out and tried to start our lift; and it wouldn't. We finally got it to go down bleeding down the lift.
[Report narrative contained no additional information.]
Two Maintenance Technicians reported that the wing flaps of the aircraft made contact with under wing stands when the aircraft settled due to fueling.