The National Transportation Safety Board has released the preliminary report on the Perry County plane crash that killed four people, including two Oklahoma State University women's basketball coaches.
Prior to take off on November 17, no flight plan was filed for the trip. The Piper PA-28-180 did not have any services performed before departing the Stillwater Regional Airport in Oklahoma.
During the flight, skies were clear. The plane was flying around 7,000 feet when it turned right and disappeared from radar. Witnesses say the plane made turns at low altitudes before falling into a steep nose dive.
No communications were made with air traffic control at time of crash.
Oklahoma State women's basketball coach Kurt Budke and his assistant coach Miranda Serna died in a plane crash. The pilot, former Oklahoma state Senator Olin Branstetter, 82, and his wife, Paula, 79, also died.
The wreckage is now in a warehouse in Clinton for further inspection.
To view the full preliminary report from the NTSB, click here.