Originally Posted by
threadworm
Later investigation indicated that a Jap suicide plane, probably a Tony Kawasaki Ki-61 carrying three 132 lb. bombs hit the ship on the port side at the water line in the vicinity of frame 80. The ship was holed in three places: A seven foot hole in the engine room at the water line caused by the
engine and fuselage to which it is believed was attached a bomb which was the first explosion, a ten inch hole in the engine room about 2 feet above the water line caused by a
bomb which was later discovered as a dud, and a four foot hole in Compartment A-304-EL a crew's berthing space, caused by a bomb which was the second explosion."
Bombs focus their momentum and mass at a small point of impact, which is why the wings bounced off but the bombs penetrated. Even the dud.