At 1626 Pacific time, a Cessna 310 sustained substantial damage after colliding with a fence following a landing overrun at Whiteman Airport in Pacoima, Los Angeles County. The pilot was not injured. The flight was approaching to land when the tower personnel advised the pilot that he was lined up to land on the grass adjoining the runway. The pilot executed a go-around. On his second attempt he landed long and too fast. The FAA inspector noted skid marks on the runway and bald spots on the tires of the accident airplane.