The PZL P.7a entered service in spring 1933, replacing PWS-A (licence Avia BH-33) and PWS-10 fighters. Consequently, the Polish Air Force became the world's first air force entirely equipped with all-metal monococque fighters. When the P.7 entered service, it was a modern fighter, comparable to or better than contemporary designs, but due to rapid progress in an aircraft technology, it became totally obsolete by 1939. From 1935, in most combat units the P.7 was replaced by the PZL P.11, which was only slightly more modern. The P.7as were then moved to air schools.