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The National Transportation Safety Board released both reports late this week. One was on a 2009 South Carolina crash, the other on one in 2010 in Tennessee.
The board said in South Carolina, 45-year-old pilot Patrick Walters said he should not have tried to fly through storms to his home base in Conway after dropping off a patient at a Charleston hospital. He and two on board were killed.
Investigators say the Tennessee helicopter pilot also was trying to outrun a storm and crashed in a field in Brownsville, about 55 miles northeast of Memphis. He and the two on board were killed in that crash also.