Aircraft shaking as aircraft prepared for take off roll
Just returned on a flight from ORD and on a A330 and I had an unusual experience and was wondering iof anybody can shed any light on it?
Weather as Chicago was very cold and very foggy. There was snow but it wasn’t actually snowing and no need for de-icing. As we lined up for take off the engines began to rev in preparation for the take off roll but the Aircraft didn’t move and instead began to shake quite violently for about 7 or 8 seconds whilst the engine revs increased to a level where you would certainly expect to be moving! Eventually the Aircraft did began to move and the take off and flight was as regular as can be. I've flew on this type of A/C many times before and never experience this before.
Any suggestions?