Cessna 421C N880JS accident near Leesburg, Virginia

Probable cause

Separation of the left man landing gear scissor hardware, which resulted in a loss of directional control and subsequent runway excursion during landing.

NTSB analysis

The pilot was landing the airplane and reported that as the main landing gear touched down on the runway the airplane immediately veered to the left. The pilot applied right rudder control input but was unable to control the airplane’s direction. The left main landing gear then collapsed as the airplane departed the runway surface and the airplane came to a stop off the left side of the runway. The airplane’s left wing was substantially damaged during the accident.

A Federal Aviation Administration inspector examined the airplane after the accident. He observed that the left main landing gear trunnion was cracked and that the strut had separated from the trunnion. The inspector also found that the hardware connecting the scissor link was missing and that the scissor link did not display damage consistent with a shearing action or other abnormal stress. Given this information it is likely that the hardware securing the scissor was not present at the time of the landing, which allowed the left main landing gear wheel to freely castor about the strut, resulting in the loss of directional control at touchdown.

Text from the NTSB. Open the NTSB docket for ERA23LA180 for the full record.