WASHINGTON—The Swedish Accident Investigation Authority (Statens haverikommission, or SHK) is calling on European regulators to limit the maneuvering envelope or engine power profiles on the ATR 72 until ATR and Hamilton Sundstrand, the maker of the aircraft’s six-bladed propellers, determine the root cause behind seven separate severe vibration incidents between 2007–14. “SHK’s assessment is that additional extensive engineering initiatives are necessary in ...


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