Incident
Approximately 10 minutes after departure, the passenger door of the aircraft opened in flight. The pilot decided to perform a precautionary landing at St. Johns.
Landing Decision
At the time of the landing, the wind was calm. However, the pilot was unaware of this condition. When he departed from Show Low, the wind was from the southwest. Consequently, he selected Runway 20 for landing, which has a length of 3,400 feet, instead of Runway 31, which is 5,300 feet long.
Approach and Touchdown
During the approach and touchdown, the pilot held onto the unlatched passenger door to reduce aerodynamic buffeting. After touching down, he realized that he was rapidly running out of runway.
Runway Overrun
The pilot did not retract the flaps but increased his braking efforts. Despite this, the aircraft ran off the end of the runway and collided with a chain-link perimeter fence.