B767 Undifferentiated or Other Model
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
Aircraft Aircraft Damaged; Flight Crew Overcame Equipment Problem
Procedure; Weather
We were helping configure the airplane for de-ice. We set the parking brake and had maintenance pull the chocks and stairs. As the chocks were pulled; the aircraft started to slide down a sloped and iced parking ramp with the parking brake set. I turned on the hydraulics and the aircraft came to a stop. Minor damage was done to the left inner leading edge wing of the aircraft when plane contacted the crew stairs when it started rolling.
Cockpit brake monitor during ground deicing reported that the B767 aircraft began sliding; with parking brake set; once chocks were removed. Turning on hydraulics stopped the sliding; but after the wing was damaged by impact with aircrew stairs.