You are correct Reddog, he shot down the C-47 to prevent it from landing on a Japanese airfield. Why they were going to land on an enemy airfield, I don't know. But, they painted an American flag on the plane as a joke and I guess it stuck. He tried to claim the title as 'double ace,' but, they wouldn't allow the American kill. I'm sure he was not the first fighter pilot to down an aircraft on his team, American bombers were bad about shooting at American fighters in the heat of combat, and, yes, they did shoot them down.