The National Transportation Safety Board (NTSB) said a regional jet overran the end of a runway in Michigan last year because the pilots elected to land on a snowy runway without performing the required landing distance calculations. The mishap occurred on April 12 when a Bombardier/Canadair Regional Jet (CRJ) CL600-2B19 operated as Pinnacle Airline 4712 ran off the departure end of Runway 28 after landing at Cherry Capital Airport(TVC) Traverse City, MI. There were no injuries among the 49 passengers and three crewmembers. NTSB Chairman Mark Rosenker said “piloting an aircraft should not be guess work. There are rules and guidelines that need to be followed at all times. The probable cause cites the pilots' decision to land without performing a landing distance assessment, which was required by company policy because of runway contamination reported by ground operations personnel The Safety Board said “this poor decision-making likely reflected the effects of fatigue produced by a long, demanding duty day, and, for the captain, the duties associated with check airman functions.” Had the pilots made the required calculations, using current weather information, the results would have shown that the runway length was inadequate for the contaminated runway conditions described.