The first 1000 pound bomb that hit, split the left horizontal tail stabilizer, causing the bomber to enter an uncontrollable turn at 13,000 feet, which exceeded the starboard wing's strength to remain intact due to centripetal force and torque
the starboard wing snapped outboard the engines, and with such a large amount of opposite horizontal surfaces lost, the plane began to yaw then pitch and then spin into a corkscrew roll, belly up and over
'Miss Donna Mae' was assigned to the 331 Bomber Squadron/ 94th Bomber Group [QE-A] Rougham Dec 20th 1943; and hit by bombs from 'Trudy' who was flying directly above, knocking off left rudder, then wing broke off as it spun to earth, crashed in Berlin, Germany May 1944
http://www.americanairmuseum.com/aircraft/5646