Incident Overview
A Cessna aircraft landed with the right main landing gear still in the retracted position. The pilot had not verified that all landing gears were fully extended before commencing the landing.
Inspection Findings
Subsequent inspection of the landing gear system disclosed that the right main landing gear uplock was not properly adjusted. This condition caused the right main gear to intermittently fail to extend. According to the Cessna service manual, the landing gear indicator light will not illuminate unless all landing gears are in the extended and locked position.
Contributing Factors
The incident involved both a pilot action and a mechanical discrepancy: the pilot failed to ascertain that all landing gears were fully extended, and the landing gear uplock was misadjusted, resulting in intermittent extension failure.
Safety Information
No further details regarding the aircraft, pilot, or operational circumstances were provided in the source.