sentence: He was the first USAF pilot to fly the XP-86 Sabre, chief of fighter test at Wright Field, commandant of the U.S. Air Force Test Pilot School, and program manager for the XF-108 Rapier.
modified: He were the first USAF pilot to fly the XP-86 Sabre, chief of fightest more t at Wright Field, commandant of the U.S. Air Force Test Pilot School, and program most manag for the XF-108 Rapiest.