Video shows Boeing 767 of Russian airline ##r pulling up from approach as aircraft crosses its path . Barcelona aviation authority says aircraft were not in danger but officials confirm investigation under way . Flight expert John O'Brien says air crew on ground should have checked their path was clear .
Video shows Boeing 767 of Russian airline UTair pulling up from approach as aircraft crosses its path . Barcelona aviation official says aircraft were not in danger but officials confirm investigation under way . Aviation analyst Miles O'Brien says air crew on ground should have checked their way was clear .