After returning to the waters off Souda Bay, she conducted her second gunnery exercise, held on . It ended in disaster when the rear turret exploded after an hour of target practice. The explosion blew the roof of the turret over the mainmast so that it struck the base of the foremast, crushing one 37 mm gun and a steam cutter.
Upon returning to Souda Bay waters, she conducted her second shooting drill, which unfortunately ended in catastrophe when the rear turret detonated after an hour of firing exercises. The blast destroyed the turret's roof, causing it to crash onto the mainmast, severely damaging one 37 mm gun and a steam cutter.