After the exercises, "Aylwin" sailed to Peru and arrived at Callao on the morning of 28 May. That day, Rear Admiral Sinclair Gannon, Commander, Destroyers, Scouting Force, broke his flag in "Aylwin". Winding up her Peruvian visit on 2 June, she got underway for California, but paused in Panama Bay from 6 to 8 June before continuing on to San Diego. "Aylwin" reached her home port on the morning of 16 June and moored alongside . That afternoon, Rear Admiral Gannon transferred his flag to the destroyer tender.