Two onboard air carrier Mechanics and one Ground Marshaller reported a ground encounter with a parked aircraft during aircraft repositioning to a hangar. Marshaller stated he misjudged the lack of winglet clearance.
Synopsis
Two onboard air carrier Mechanics and one Ground Marshaller reported a ground encounter with a parked aircraft during aircraft repositioning to a hangar. Marshaller stated he misjudged the lack of winglet clearance.
Narrative
I was sitting right seat (FOs (First Officer) seat) handling radios; taxiing Aircraft X from Gate XX to hangar for an upcoming event. While approaching the front of the hangar for parking; engines at idle coasting to the end of the lead in line while guided by a marshaller; I noticed a jolt just prior to reaching the end. It was at this time the marshaller gave us a stop signal. At this time; I felt that we may have contacted the aircraft parked to the left of us Aircraft Y since I ensured there were no objects on the apron as we were approaching the hangar (i.e. chocks; cones; etc.). I then instructed the left seat operator (Captain's seat) to set brakes and shut down both engines. I then radioed Ramp Control to notify them we were shut down and that movement was terminated at hangar. I then radioed my Supervisor and advised him that there may have been aircraft contact between the two aircrafts and that we would assess. Once I was removed from the aircraft; I noticed that Winglet-to-Winglet and Strakelet-to-Strakelet contact was made. I informed my Supervisor of the findings; asked him to come to our location; shut down the aircraft and secured the area.
Second reporter narrative
During aircraft move from spot XX to hangar; left winglet of Aircraft X made contact with right winglet of Aircraft Y in front of hangar. I was performing the aircraft marshalling and it appeared that there was enough clearance from each aircraft winglet as I was guiding Aircraft X forward. From there as I was guiding Aircraft X the left winglet made contact with the right winglet and aircraft movement was stopped in place.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.