States invited Canada to provide a contingent. Canada agreed to replace Australia in the MFO and to supply a helicopter squadron, staff officers and a flight-following section of air traffic controllers totalling 136 military personnel. The Canadian Contingent (CCMFO) was brought on strength of the Canadian Forces on September 26, 1985. December 1985 On December 12, 1985, a chartered Arrow Air DC-8 with 248 returning members of the U.S. 101st Airborne Division and eight flight crew crashed into the cold, damp landscape at the end of runway 22 at Gander International Airport in Gander, Newfoundland, with no survivors. The 101st was rotating home from a tour of duty with the MFO. The accepted theory is that the crash was caused by ice accumulation on the leading surfaces of the wings, but debate and speculation still rages that the crash may have resulted from some type of incendiary device placed on the plane. April 1986 The Australian contingent, consisting of staff officers and a helicopter squadron who were members of the initial deployment, withdrew in the course of their government's reduction of its peacekeeping commitments. They were replaced by the CCMFO Canadian Rotary Wing Aviation Unit, equipped with nine CH135 Twin Hueys, staff officers and flight following. The CCMFO was operational at El Gorah on March 31, 1986. Canadian tactical helicopter units rotated to El Gorah for six-month tours of duty. The primary units providing military personnel were 408, 427 and 430 Tactical Helicopter Squadrons and 403 Squadron Helicopter Operational Training Squadron. January 1993 The Australians, who had been replaced by a British contingent, returned to the mission, and the British contingent withdrew. Lieutenant Colonel Martin Hamilton-Smith was the first contingent commander of the returning Australians. He went on to become a South Australian politician after his military career. August 1994 Australian MFO contingent members were involved in a hit-and-run accident that they failed to report. The incident came to light when one of the vehicle passengers, army Staff Sergeant David Hartshorn, reported it after he had been returned to Australia. Prima facie evidence of the incident was established and included in a formal inquiry by the Australian government in 2004. In an article by News Limited Network journalist Ian McPhedran on 30 August 2012, former Staff Sergeant David Hartshorn has received an apology from former Australian Army Chief Lieutenant General David Morrison and Inspector General of the Australian Defence Force