Feb 18 (Reuters) - Canadian investigators said on

Tuesday they recovered the so-called black boxes from a regional

jet that flipped upside down upon landing in windy conditions a

day earlier at Toronto's Pearson Airport, injuring 21 of the 80

people on board.

Investigators from Canada's Transportation Safety Board are

leading the probe to figure out why the CRJ900 aircraft operated

by Delta Air Line's Endeavor Air subsidiary went belly

up on Monday at Toronto's Pearson Airport, the country's largest

airport.

TSB senior investigator Ken Webster said in a video that the

cockpit voice recorder and flight data recorder were sent to the

agency's lab for further analysis into what happened to Flight

DL4819 from Minneapolis-St. Paul International Airport to

Toronto