National Transportation Safety Board

摘要

Based on preliminary findings from the National Transportation Safety Board's ongoing investigation of an incident involving the loss of control of a Saab SF340 and findings following previous icing accidents/incidents investigated by the Australian Transport Safety Bureau (ATSB), the Safety Board has become concerned about deficiencies in the cold weather operational procedures used by Saab SF340 pilots, as well as the performance of the airplane in icing conditions. This letter proposes recommendations that, the Board believes, require immediate attention to mitigate the existing risk to the Saab SF340 fleet when operating in icing conditions.