Transportation Safety Board of Canada

Transportation Safety Board of Canada

July 09, 2008 11:15 ET

The Transportation Safety Board of Canada Identifies Safety Risk When See-and-Avoid is the Sole Defence Against Mid-Air Collision

GATINEAU, QUEBEC--(Marketwire - July 9, 2008) - The Transportation Safety Board of Canada (TSB) released its final investigation report (A06O0206) today into the August 4, 2006, mid-air collision west of Caledon, Ontario. The collision involved a Cessna 172P operated by the Brampton Flying Club and flown by an instructor and student, and a Cessna 182T flown by its owner. The three occupants of the aircraft were fatally injured and the aircraft destroyed.

In a very small altitude band immediately outside the radius of the Toronto/Lester B. Pearson International Airport, there is a concentration of traffic not subject to direct air traffic control by tower controllers. Radar data reviewed by the TSB during a 10-day period around the accident indicated a heavy volume of visual flight rules (VFR) traffic within this altitude band. In this and other congested airspaces, the see-and-avoid principle does not always ensure safety of flight.

In its report, the Board recommends that:

The Department of Transport, in coordination with NAV CANADA, take steps to substantially reduce the risk of collision between visual flight rules aircraft operating in Class E airspace surrounding the Toronto/Lester B. Pearson International Airport.


The Board also released a Safety Concern in its report. It underscores the TSB's assertion that, until technological or other solutions are mandated, a significant risk of collision between VFR aircraft will continue to exist in controlled airspace around Canada's high-density airports. "Technological solutions, such as on-board collision protection systems, should be considered to prevent future mid-air collisions," said Don Enns, Regional Manager of Air Investigations. The Board requests that Transport Canada take a lead role, in cooperation with industry, in examining potential solutions.

The TSB is an independent agency that investigates marine, pipeline, railway and aviation transportation occurrences. Its sole aim is the advancement of transportation safety. It is not the function of the Board to assign fault or determine civil or criminal liability.

This news release and photographs for this occurrence can be found on the TSB website at

Contact Information

  • Transportation Safety Board of Canada
    John Cottreau
    Senior Media Relations Advisor
    (613) 292-4146 (cell)
    Transportation Safety Board of Canada
    Julie Leroux
    Media Relations Specialist
    Cellular: 613-290-9875