LONGMONT — The Boulder County Sheriff's Office says a pilot escaped injury when he lost power of his small airplane and crash-landed in a field near the Longmont Municipal Airport.

Cmdr. Heidi Prentup says 74-year-old Harold Kosmerl of Longmont crashed during takeoff at about 9:30 a.m. Sunday. His single-engine airplane, a 1998 Katana Diamond, was heavily damaged when it crashed 300-400 yards from the runway.

Kosmerl was the only one on board at the time.

The Federal Aviation Administration and the National Transportation Safety Board will investigate the crash.