Airbus is preparing to transport the first A350 upper wing-cover from Germany to the airframer's main wing facility in the UK.
It has loaded the upper cover, manufactured at its Stade plant, onto one of its A300-600ST freighters for transit to Broughton over the next few days.
The covers are 32m (105ft) long and 6m wide. Airbus said the components are the "biggest single civil aviation parts made from carbonfibre ever".
Spain's Illescas manufacturing facility is producing the lower wing-cover, and this is also set to be flown to Broughton.