Air transportation safety investigation A19O0117

Updated in July 2020 : This ongoing investigation is in the report phase.

Table of contents

Runway incursion

Air Georgian Bombardier CRJ-200
Toronto/Lester B. Pearson International Airport, Ontario

The occurrence

On , an Air Canada Boeing 777 aircraft, operated as flight ACA883, landed on Runway 33L at Toronto/Lester B. Pearson International Airport, Ontario. It was instructed by air traffic control (ATC) to cross Runway 33R in direction of the terminal. At around the same time, an Air Georgian Bombardier CRJ-200 aircraft, operated as flight GGN7339, was taxiing to Runway 33R for departure in accordance with ATC instructions. Shortly after the latter began its takeoff roll, the crew noticed flight ACA833 over the crest of the runway and aborted the takeoff. The TSB is investigating.

Investigation information

Map showing the location of the occurrence


Photo of Glen Whitney

Glen Whitney joined the TSB in June 2008 as an investigator/operations specialist in the TSB Air Investigations Branch at Head Office, in Gatineau, Quebec. He has over 26 years of civil aviation experience and has accumulated over 14,000 flight hours.

Prior to joining the TSB, his experience was gained flying floats, northern and gravel operations as well as scheduled commuter airline flying. He was also involved in flight crew training and checking and was the chief accident investigator at the airline.

Class of investigation

This is a class 3 investigation. These investigations analyze a small number of safety issues, and may result in recommendations. Class 3 investigations are generally completed within 450 days. For more information, see the Policy on Occurrence Classification.

TSB 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.

The TSB is an independent agency that investigates air, marine, pipeline, and rail 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.

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