The Coast Guard’s medium icebreaker Healy was towed to Port Angeles, Washington, earlier this month as a result of a “significant engineering casualty,” according to a release.The Cutter Healy, which recently completed drydock repairs at the Swan Island shipyard in Portland, Oregon, lost propulsion during sea trials off the Washington coast July 13 and was towed to port without incident. Coast Guard officials said no personnel were injured in th…