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NTSB: don`t use thrust reverser credit to determine runway stopping distances
27 January 2006

The U.S. NTSB urged the FAA to prohibit airlines from using credit for the use of thrust reversers when calculating stopping distances on contaminated runways. The urgent safety recommendation is the result of information learned by the NTSB during its investigation into a fatal runway overrun in Chicago last month. If the thrust reverser credit had not been allowed in calculating the stopping distance for flight 1248, the on-board laptop performance computer would have indicated that a safe landing on runway 31C was not possible. As a result a single event, the delayed deployment of the thrust reversers, can lead to an unsafe condition, as it did in this accident. (NTSB)