FAA has issued an emergency AD calling for replacement of certain Bell Model 206L (and -1, -3 and -4) main rotor blades that exceed a new shortened life limit. Originally 3,600 hr. time in service, the new life limit is 1,400 hr. The AD stems from a Transport Canada report of two accidents involving failure of the main rotor blade because of fatigue cracking. Transport Canada advises that there is no reliable inspection method to detect the cracks on these blades before such failure. Bell ...


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