Complex sentence: The Air Force selected the YF119 engine to power the F-22 production version; the Lockheed and Pratt & Whitney designs had higher technical ratings, were considered lower risks, and were considered to have more effective program management.
Split into simpler sentences: The Air Force selected the YF119 engine to power the F-22 production version. The Lockheed and Pratt & Whitney designs had higher technical ratings, were considered lower risks, and were considered to have more effective program management.