MAP - Locates Petawawa, Ont. The Royal Canadian Air Force is searching for two members who are missing after a military helicopter crashed in eastern Ontario early Tuesday morning. The Department of National Defence says four Royal Canadian Air Force members were on the CH-147 Chinook helicopter when it crashed after midnight near the Ottawa River near Petawawa, Ont. The Canadian Press has prepared a map locating the area. ; THE CANADIAN PRESS/Sean Vokey