On February 17, the CRJ-900, operated by Endeavor Airlines as Delta Connection Flight 4819 from Minneapolis to Toronto, landed in a fiery crash that ripped off a wing and rolled the plane upside down.

Endeavor Air, based in Minneapolis, is a subsidiary of Delta Air Lines and the world’s largest operator of CRJ-900 aircraft. The airline operates 130 regional jets, flying 700 daily routes to ...