Accident Details
On August 29, 2016, at approximately 0930 central daylight time, a North American Navion airplane, registration N91488, departed the side of runway 18 at Monett Regional Airport (KHFJ) in Monett, Missouri. The airplane was substantially damaged, but the pilot reported no injuries. The flight was operated as a personal flight under 14 Code of Federal Regulations Part 91 by a private individual. Visual meteorological conditions prevailed, and no flight plan was filed. The flight originated from Gimlin Airport (18MO) in Ozark, Missouri, and was landing at KHFJ.
Pilot Account
The pilot reported that after a normal approach and landing on runway 18, he observed that the airplane's right wing was lower than the left wing, and the airplane began to pull to the right. The airplane exited the right side of the runway, descended an embankment, and traveled through a barbed wire fence. Upon inspection, the pilot noted that the right main landing gear (MLG) had collapsed. During recovery, when the airplane was lifted, the right MLG was extended manually and locked into place.
Aircraft Examination
Inspectors from the Federal Aviation Administration (FAA) examined the airplane. A landing gear swing test was conducted, which revealed that the landing gear had been improperly rigged.
Maintenance History
A review of the airplane's history indicated that several weeks before the accident, the right MLG scissor was damaged during a high-speed turn. Maintenance records showed that on July 22, 2016, the right MLG scissor was replaced with a serviceable unit, and a gear retraction test was performed and described as satisfactory.