Much remains unknown about the Delta Air Lines plane that crash landed at Toronto Pearson Airport Monday, whose fiery touchdown left the plane resting upside down on the tarmac and 21 of its 76 passengers injured. But based on preliminary videos of the plane crash as well as audio snippets from air traffic control during the incident, aviation experts tell the Star there are some hints as to what might have happened. Until the investigation into the crash concludes, experts can only speculate as to what happened. Here’s what they think so far. https://www.thestar.com/news/gta/what-caused-the-toronto-plane-crash-experts-break-down-the-delta-crash-landing-at-pearson/article_4cd77dca-ee18-11ef-9a80-abf825c50673.html