LONDON -- Engine maker Pratt & Whitney has discovered what caused a developmental F-35 Joint Strike Fighter engine blade to crack last year and identified a design change that officials are hopeful will fix the problem. Last month, the Connecticut-based company presented subject matter experts with detailed findings of what it feels caused the August 2007 incident where a blade inside the third-stage turbine of a Marine Corps short take-off and vertical landing (STOVL) engine cracked, according to Bill Gostic,...
