Some carried five-gallon jugs of water, others hauled stretchers, rockets, mortar ammunition or bundles of plastic explosives and spools of time-fuse and detonating cord.
From the post-gazette.com
A later investigation by the Imperial Japanese Navy concluded that a faulty fuse ignited the gunpowder bags in the breech, detonating the shell while still in the barrel.
From the en.wikipedia.org
Still, a number of things could go wrong from a fuse malfunctioning, a problem with the barrel's assembly to a round prematurely detonating inside the tube, he said.
From the dailyherald.com
Still, a number of things could go wrong, such as a fuse malfunction, a problem with the barrel's assembly, or a round prematurely detonating inside the tube, he said.