Incident Overview
During approach to his destination after a four-hour cross-country flight, the pilot received an unsafe landing gear indication upon extending the gear. He confirmed that the right main landing gear was unlocked and only partially extended. Following emergency gear extension procedures did not resolve the issue.
Emergency Landing
The pilot chose to land on the grass to the east of the active runway. The nose gear and left main gear were extended and locked, while the right main gear remained partially extended. After touchdown on the locked gears, the airplane rolled and skidded for approximately 1,300 feet before coming to a stop.
Post-Accident Examination
Examination of the landing gear system revealed that the right main landing gear had failed to fully extend and lock. Further inspection of the airplane found that the emergency gear extension valve malfunctioned.