But the NTSB stopped short of recommending the planes be grounded . Safety Board : quick fix for Boeing 777 engine failure . Rolls - Royce engine blamed for two incidents last year . NTSB : ` ` High probability '' of similar recurrence . Some 56 U.S. aircraft accidents ; reported worldwide .
Safety Board : quick fix for Boeing 777 engine failure . Rolls - Royce engine blamed for two incidents last year . NTSB : ` ` High probability '' of similar recurrence . Some 56 U.S. aircraft accidents ; reported worldwide .