Who is investigating the Delta plane crash at Toronto Pearson Airport?

The Delta plane crash at Toronto Pearson Airport is under active investigation, though the cause remains unknown. According to Todd Aiken, the Toronto Pearson Fire Chief, the investigation is being led by the Transportation Safety Board. While details about the incident are still emerging, this crash marks the fourth major aviation incident in North America within just three weeks. Despite the severity of the accident where the aircraft flipped during landing in snowy conditions, all 80 passengers survived, though 18 sustained minor injuries.