2023-06 · NASA ASRS report 2009503
Air carrier cargo pilots reported after parking the aircraft at the gate and releasing the parking brake; the aircraft rolled about one foot back and damaged the First Officer's side angle of attack vane.
After Aircraft X parking; I had parked the plane in spot xx and had turned off the engines and set the parking brake. After receiving the chalks installed hand signal from the ground crew I took off the parking brake. Initially (approximately 1 minute) the plane showed no signs of moving. After a minute or so both my First Officer and I felt the plane shift backwards. I initially assumed that the plane had settled into the chalks and the event was done. However the plane shifted one more time and I immediately put the parking brake back on. My First Officer then went to open the door to check if the exterior was okay; but we were blocked in by the stairs. After getting the attention of a cargo agent; we were able to move the stairs out of the way. After we opened the door we went outside and checked the plane and the position of the chocks. Nose tire of the plane was approximately one foot away from the front chock and was properly resting on the rear chalk. We initially did not see any damage to the plane; but were later informed that there was damaged discovered on the AOA vane of the aircraft.
After Aircraft X parking; I had parked the plane in spot xx and had turned off the engines and set the parking brake. After receiving the chalks installed hand signal from the ground crew I took off the parking brake. Initially (approximately 1 minute) the plane showed no signs of moving. After a minute or so both my First Officer and I felt the plane shift backwards. I initially assumed that the plane had settled into the chalks and the event was done. However the plane shifted one more time and I immediately put the parking brake back on. My First Officer then went to open the door to check if the exterior was okay; but we were blocked in by the stairs. After getting the attention of a cargo agent; we were able to move the stairs out of the way. After we opened the door we went outside and checked the plane and the position of the chocks. Nose tire of the plane was approximately one foot away from the front chock and was properly resting on the rear chalk. We initially did not see any damage to the plane; but were later informed that there was damage discovered on the First Officer's side AOA vane of the aircraft. Four more legs were completed after the incident with no further incidents or interruptions to operations.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.
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