What happened
The incident occurred while the aircraft was en route from Camp Borden to Trenton. The flight took place at night under adverse weather conditions. During the cruise phase, the pilot lost control of the airplane. The aircraft subsequently crashed into high ground located near Grafton. All four individuals on board were killed in the accident.
Findings
The official investigation determined that the crash occurred during a night cross-country flight intended to provide practical air navigation experience. The primary factor identified was the loss of control by the pilot while operating at low altitude over high ground in adverse weather conditions.