It was only 15 minutes from the time Kent Feuerring took off from East Hampton Town Airport in his Seamax M-22 on the pristine morning of Oct. 6, 2022, until the right wing separated from the plane, causing him to crash in Three Mile Harbor. It took nearly two years for the National Transportation Safety Board to release its final report on the fatal accident, which they did last week, blaming the manufacturer for using a nut that couldn’t handle the job it was given.