Occurrence
On 9 August 2019, an Air Georgian Limited Bombardier CRJ200 (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. Simultaneously, an Air Canada Boeing 777-300 (registration C-FIUR, serial number 35242) was completing flight ACA883 from Kobenhavn/Kastrup Airport, Copenhagen, Denmark, to Toronto.
At 1240 Eastern Daylight Time, the flight crew of the CRJ200 began taxiing. Approximately three minutes later, the tower controller instructed them to line up on Runway 33R. At about the same time, the Boeing 777 landed on Runway 33L and taxied onto Taxiway H. The north ground controller instructed the Boeing 777's crew to cross Runway 33R. While the Boeing 777 was crossing the runway, the CRJ200 began its takeoff roll without clearance. When the CRJ200's crew 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 and no aircraft damage.
Aftermath
The Transportation Safety Board of Canada investigated the occurrence as a Class 3 investigation. No further details from the investigation were provided in the source.