CALGARY -- WestJet Airlines Ltd. says it has cancelled orders for 15 Boeing 737 Max aircraft as the industry-wide downturn in aviation continues.

The cancellations leave WestJet with 27 Max aircraft remaining on order, the company says.

"WestJet remains committed to our 737 MAX aircraft and have safely returned the first three of our 14 MAX to the fleet," WestJet spokeswoman Morgan Bell said.

In January, WestJet was the first Canadian airline to return the Max into service, after Transport Canada lifted a nearly two-year grounding order for the aircraft.

The aircraft was grounded in airspace worldwide in March 2019 after deadly crashes in Indonesia and Ethiopia that investigators said were caused by a faulty sensor system.

Transport Canada required airlines to make a number of design changes and implement additional training procedures for pilots operating the Max.