[hharney]

As Dave suggested, more information is needed to determine what may have caused this to happen. NO, it is not normal for the fuel to migrate to the booms and inside the wings as you have described. The main tank(s) on each wing are two separate fuel cells connected by three couplers, two lower and one upper. The only other port on the fuel cell is the line that delivers fuel to the fuel sump in the boom where the quick drain is. Without knowing what maintenance was performed it is difficult to determine what may have caused this problem.

Need more info..........