Investigators have found a major fatigue crack in the spar of the wing that separated from a Chalk's Ocean Airways turboprop Mallard on takeoff from Miami on Monday. The wing was recovered Tuesday and fatigue was quickly apparent. "We've seen fatigue. We don't know why that fatigue appeared. That is what we're trying to determine," Mark Rosenker, acting chairman of the National Transportation Safety Board, told reporters Wednesday morning. "This crack appears to extend through a majority of the spar at the location of the separation." A total of 19 passengers, most of them from the Bahamas, and the pilot died.
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