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Air transportation safety investigation A19O0117

The TSB has completed this investigation. The report was published on 15 January 2021.

Table of contents

Runway incursion

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

View final report

The occurrence

On , the Air Georgian Limited Bombardier CRJ 200 aircraft (registration C-GKEJ, serial number 7269) was preparing to conduct flight GGN7339 from Toronto/Lester B. Pearson International Airport, Ontario, to John Glenn Columbus International Airport, Ohio, United States. The Air Canada Boeing 777-300 aircraft (registration C-FIUR, serial number 35242) was completing flight ACA883 from Kobenhavn/Kastrup Airport, Copenhagen, Denmark, to Toronto/Lester B. Pearson International Airport, Ontario.

At 1240 Eastern Daylight Time, the flight crew of the CRJ 200 began taxiing and approximately 3 minutes later, was instructed by the tower controller to line up on Runway 33R. At approximately the same time, the Boeing 777 landed on Runway 33L and taxied onto Taxiway H. The north ground controller instructed the flight crew of the Boeing 777 to cross Runway 33R, and while the Boeing 777 was crossing the runway, the crew of the CRJ 200 began its take-off roll, without clearance. When the flight crew of the CRJ 200 saw the Boeing 777 over the crest of the runway, they aborted the takeoff and exited the runway via Taxiway B2. The occurrence took place during day visual meteorological conditions. There were no injuries. There was no aircraft damage.

Media materials

News release


Misinterpretation of air traffic control communication identified as a factor in August 2019 runway incursion at Toronto/Lester B. Pearson International Airport
Read the news release

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.