Aviation Investigation A15Q0075

Runway excursion

The occurrence

On 5 June 2015, a Boeing 737-600, operated by WestJet as WJA588, with 5 crew members and 107 passengers was on a flight from Toronto, Ontario (Lester B. Pearson International Airport) for Montréal, Quebec (Pierre Elliott Trudeau International Airport). Upon landing on runway 24L, in heavy rain, the aircraft left the end of the runway and stopped in the grass approximately 200 feet past the threshold. No one was injured and all were able to deplane from the right hand front door using a portable staircase.

Map of the area


Photo of Jean-Marc Ledoux

Mr. Ledoux has 35 years of civil aviation experience. He joined the Transportation Safety Board (TSB) in April 1999 as an investigator in the Air Investigations Branch, in Dorval, Quebec, and has been the regional manager for the Quebec region since 2003. He has been the investigator-in-charge on several aviation investigations.

Mr. Ledoux worked as an airline pilot for different Canadian carriers, accumulating more than 15 000 flight hours in a wide variety of operations around the world. He flew different aircraft types, from small training aircraft to larger commuter aircraft, eventually piloting large jet aircraft such as, DC8, L1011, B747, and Airbus 310. He also holds a helicopter pilot license. Before joining the TSB, Mr. Ledoux worked at Transport Canada as inspector in the enforcement department.

Since joining the TSB, Mr. Ledoux has participated in several TSB investigations, and has also assisted numerous foreign investigation agencies in their investigations of accidents abroad. He is also a team member of the Universal Safety Oversight Audit Program (USOAP) with the International Civil Aviation Organization (ICAO).


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Transportation Safety Board investigation process

There are 3 phases to a TSB investigation:

  1. Field phase: a team of investigators examines the occurrence site and wreckage, interviews witnesses and collects pertinent information.
  2. Examination and analysis phase: the TSB reviews pertinent records, tests components of the wreckage in the lab, determines the sequence of events and identifies safety deficiencies. When safety deficiencies are suspected or confirmed, the TSB advises the appropriate authority without waiting until publication of the final report.
  3. Report phase: a confidential draft report is approved by the Board and sent to persons and corporations who are directly concerned by the report. They then have the opportunity to dispute or correct information they believe to be incorrect. The Board considers all representations before approving the final report, which is subsequently released to the public.

For more information, see our Investigation process page.


Deployment notices

TSB deploys team to the site of an aircraft accident at Pierre Elliot Trudeau International Airport at Montreal, Quebec
Read the deployment notice