the "movie" Memphis Belle was total hollywood , every thing that could possibly happen to a plane and crew happened in the movie on that last flight.
watch the documentary the army air corp filmed of the last flight of Memphis Belle crew, nothing happened to them.
the crew was sent back to the USA after the 25 mission but the plane flew one more mission before it was decided to send the plane back for a war bond promo, ( planes were not retired after 25 missions)
note: the crew of the Memphis Belle was the first crew to reach 25 missions.
note 2: hollywood always shows the crew of a B17 grabbing the edge of the hatch and swinging their feet up into the plane, the documantary shows portable steps under the hatch and the crew walks up into the plane. .....yawn , real life is so undramatic