At 1028 eastern time, a Cessna 180D amphibian was damaged while departing from Moosehead Lake. The pilot and passenger received minor injuries. The pilot reported that he had no aileron control as he took off from the lake. Inspection revealed a turnbuckle had separated from the right aileron cable. The turnbuckle was not safety-wired. The aileron cables had been replaced at the previous annual inspection, which had take place about 55 hours earlier.