Toward the end of the war, the Su-17 force was partially replaced by the Mikoyan-Gurevich MiG-27s in order to perform operational testing of the new fighter-bomber.
Mod slutningen af krigen blev de fleste Su-17'ere udskiftet med Mikoyan-Gurevich MiG-27'erne for at kunne teste den nye MiG-27 som jagerbomber.