NTSB: Man killed in helicopter crash was training his son

PERRY, Okla. (AP) – Federal investigators say the person killed in a weekend helicopter crash in Oklahoma was teaching his son crop-dusting techniques when the aircraft crashed.

In a preliminary report issued Friday, the National Transportation Safety Board said the man killed in the Nov. 28 crash was a full-time air ambulance pilot who did seasonal, part-time crop dusting.

He was demonstrating low-level crop-dusting flight and was flying at 25 mph 50 feet above the ground when the chopper rolled left, crashed and burned.

The son escaped with serious injuries, but his father died.