on 17 february 2016, air canada signed a letter of intent with bombardier for up to 75 cs300 aircraft as part of its narrowbody fleet renewal plan. this comprised 45 firm orders, plus options for an additional 30 aircraft. it includes substitution rights to cs100 aircraft in certain circumstances, with deliveries to occur from late 2019 to 2022. the $3.8 billion order for 45 cs300 aircraft was finalized on 28 june 2016.