412 RCAF Air Transport Command (Falcon) Squadron, Uplands, Ottawa. B-25 Mitchell III aircraft 5220 had just taken off from Milwaukee airport with an intended destination of Truax Field Air National Guard Base at the Dane County Regional Airport near Madison, Wisconsin. However, with one engine out of control and with a over-speeding propeller, the Mitchell was forced to turn back. Tragically, it crashed into the Milwaukee Harbour of Lake Michigan, 1 mile off shore, three miles short of the runway at Billy Michell Field, Milwaukee. All six crew members on board the aircraft perished in the accident
Air Commodore JG Stephenson OBE AFC CD (RCAF), Wing Commander GW Kusair DFC CD (RCAF), Flyong Officer RP Howard (RCAF), Flight Lieutenant DE Dyck (RCAF), Sergeant LUJ Bisson (RCAF) and Leading Aircraftman NA Porteus (RCAF) were all killed in the crash