I remember reading that they did indeed find explosive material consistence with with what a warhead would carry, but that was because that aircraft was used for a training exercise were explosive material was brought on board and dogs were used to locate the explosives.
Stuff must have not been packaged very well for that much material to remain behind in the aircraft.
During WW2 the US Porter (DD) fired live torpedoes at the BB Iowa, with FDR aboard...fortunately the torpedo hit the Iowa’s wave and detonated short...the whole crew were sent to Bermuda under arrest...so frack ups occur.