BRUSSELS, Aug 28 (Reuters) - Boeing ( BA ) is seeking EU

approval to buy back Spirit AeroSystems ( SPR ), the world's

largest standalone aerostructures company, documents on the

European Commission website show.

Boeing ( BA ) said in July last year that it had agreed to buy its

former subsidiary for $4.7 billion in shares while Airbus would

take on the supplier's loss-making Europe-focused activities.

The EU executive body is expected to make its decision on

the deal by September 30.

Britain's competition regulator cleared the acquisition this

month after deciding against an in-depth investigation into

whether the deal would be anti-competitive.