 The former problem was partly due to the tandem main landing gear being very narrow, in order to fit into the wings; the leg shortened in length and rotated as it was stowed.During one landing incident, the chain mechanism (used to shorten the gear) in the Mark 1 gear jammed, resulting in incomplete rotation.In a second incident with Arrow 202 on 11 November 1958, the flight control system commanded elevons full down at landing; the resulting reduction in weight on the gears reduced the effective tire friction, ultimately resulting in brake lockup and subsequent gear collapse.