Approximately one hour later, "Hiryū"'s second attack was made. It consisted of ten torpedo bombers and six escorting A6Ms. The US repair efforts had been so well done that the Japanese assumed she must be a different, undamaged carrier. In the attack, "Yorktown" was struck by two torpedoes; she lost all power and developed a tilt to port, which put her out of action. Admiral Fletcher moved his command staff to the heavy cruiser . Neither of the carriers of Spruance's Task Force 16 was damaged.