20210405018449I

At appoximately 1930Z, pilot departed and after selected the landing gear handle up, noticed he did not have an amber light indicating the gear was up and locked. The pilot then viewed the main gear in trail. He selected gear down and could hear the nose gear cylcle down and lock as the main gear continued in trail. Using the pilots operating handbook, the pilot then attempted to perform an emergency gear extension but the landing gear still would not extend to the down and lock position. The pilot elected to perform a gear up landing parallel to the runway in the grass to minimize the damage. The mixture was pulled on short final to secure engine, and aircraft landed with propeller still windmilling. Damage to aircraft consisted of a propstrike, two lower antennas sheared off, exhaust tip bent and minor lower engine cowling damage. An inspection of the landing gear found gouging on main landing gear retractor gear and both bolts sheared retaining the retractor gear in place, and chipped and damaged teeth on left and right main landing gear pinion sector gears.