A pilot suffered only minor injuries following an aircraft crash near the south boat ramp at Lake Mendocino yesterday morning. The 71-year-old pilot said the ultralight airplane lost power shortly after takeoff. He was able to escape and crawled to exposed land near the decreased lake water level. The airplane is believed to be submerged in approximately 15-30 feet of water and recovery efforts had to be postponed until today as specialized personnel and equipment are needed.