The USAF operational evaluation from November 1953 to December 1955 found the new fighter to have superior performance, but declared it not ready for wide-scale deployment due to various deficiencies in the design.
Den operationelle evaluering som USAF foretog fra november 1953 til december 1955 bemærkede, at den nye jager havde en fremragende ydelse, men at den endnu ikke var klar til at gå i udbredt tjeneste på grund af nogle mangler ved designet.