The main reason we mess up our fairway bunker shots is because we allow the hands to interfere and cast the golf club down too early into the sand. Learn to strike the golf ball cleanly off the surface of the sand and you'll have the distance to land it on the green, no problem. Just follow Scott Cranfield's simple bunker lesson.
Position your hands slightly lower on the grip of the club and tighten your grip.
The lower and tighter grip will shorten your backswing, you only want a three quarter swing from the fairway bunker (this will give you more control).
Position your ball slightly forward of centre and very slightly increase the weight on your front foot.