 In the meantime the horizontal stabilizer of the second prototype was strengthened and it resumed flying on 20 July . The pilot complained of excess torque pull to the right so the vertical stabilizer was enlarged by 0 @.@ 63 m2 ( 6 @.@ 8 sq ft ) , but this was just one of numerous problems , and it was not ready to pass State acceptance trials without more development work on the powerplant . However , the second prototype continued flight testing until 12 July 1946 when an engine fire forced an emergency landing and it was damaged beyond repair . 
