Engine Failure After Maintenance
On May 13, 2020, about 0842 mountain standard time, a Mooney M20J airplane, N201HH, was substantially damaged when it was involved in an accident near Phoenix Deer Valley Airport (DVT), Deer Valley, Arizona. The commercial pilot and passenger were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. According to the pilot, the purpose of the flight was to observe the airplane's performance following a propeller overhaul that was completed about 2 weeks prior. The pilot performed two initial ground runs prior to the accident, but was unable to achieve maximum takeoff rpm on either occasion. Following each ground run, the pilot would return the airplane to his hang