The Ju 388 was flown for 10 hours of flight tests at Wright Field near Dayton, Ohio with the "foreign evaluation" serial number FE-4010 (later changed to T2-4010).
Ju 388 nalietal pri testovaní na letisku Wright Field v Ohiu viac než 10 hodín, s označením FE-4010 (neskôr zmeneným na T2-4010).