Boeing 737NG operators must conduct more frequent inspections of engine fan blades as regulators move to mandate a CFM International-recommended reduction in the repetitive-check interval needed to ensure cracks are not forming at the blade roots. The EASA on Sept. 28 published an airworthiness directive requiring operators to inspect CFM56-7B-series fan blade dovetails every 1,600 cycles, or nearly twice as frequently as the previous 3,000-cycle interval. The FAA is scheduled to issue a ...

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