Shares of Bombardier company on the Toronto stock market slipped 20 cents to 2.50 Canadian dollars (about 2 US dollars) Monday after China grounded all Canadair Regional Jet 200 aircraft following a weekend crash that killed 54 people.

On Sunday, a China Eastern Airlines plane went down in Baotou, a city in the northern Inner Mongolia autonomous region, a few seconds after takeoff. The plane, a Canadian-made Bombardier CRJ-200, was headed for Shanghai with 47 passengers and six crew members aboard when it crashed into a lake. One person on the ground was also killed in the crash.

A Bombardier spokesperson said about 900 CRJ-200s are in service, and the 50-seat aircraft have flown a total of nine million flight hours since 1992.

Bombardier has sent an accident response team to China, along with Canadian government officials from the Transportation Safety Board.