After delays and cost overruns, Bombardier's US$5.4-billion CSeries passenger jet has been given the green light to enter into commercial service.
The largest plane built by the Montreal-based manufacturer was formally certified on Friday by Transport Canada.
Transport Minister Marc Garneau announced the go-ahead during a news conference at the aircraft's assembly facility in Mirabel, north of Montreal.
The 110- to 125-seat CS100 has undergone more than 1,000 test flights since its first flight on Sept. 16, 2013.
A series of challenges prompted Bombardier to delay the plane's entry in service by Lufthansa until the first half of 2016.
The larger CS300 with up to 160 seats is scheduled to be certified and be delivered to launch customer AirBaltic in September.