CHECOTAH, Oklahoma - UPDATE: The Oklahoma Highway Patrol originally thought the pilot was giving rides for a birthday party, but now says the plane was a one-seater and it was probably built at home from a kit.

A Checotah man was pronounced dead after his small plane, one built from a home kit, crashed in McIntosh County on Saturday.

The 1998 Titan Tornado II, a single-engine plane, crashed just after 4 p.m., about 2.5 miles west of the U.S. Highway 69 and Oklahoma 266 junction. 

Killed in the crash was 42-year-old Doug Hyer of Checotah.

The Oklahoma Highway Patrol said Hyer took off from a nearby airstrip, and about a 1/4 of a mile later, he nose-dived into rural private property.

Hyer had been flying people around for a birthday party Saturday, officials at the scene told News On 6 Saturday evening. Hyer was alone when the crash happened.

On Sunday, the Associated Press reported that the Titan Tornado II is a plane built from a kit.

Troopers said they believe the cause of the crash to be mechanical defect.

An official report from aviation authorities should be released after an investigation.

It has just been a little over a week since another plane crash rocked the Oklahoma community. Three recent Oral Roberts University graduates and a Northeastern State University professor died Friday, May 11, when their twin-engine Cessna 401 went down in a field in Chanute, Kansas.