Boeing on Tuesday reported an annual loss of $11.83 billion, its largest since 2020, as it grappled with problems at its commercial and defense units and the fallout from a crippling strike by U.S. West Coast factory workers.

The loss demonstrates the challenges facing CEO Kelly Ortberg in turning around the planemaker as it cedes more ground to rival Airbus.

Boeing reported a revenue of $15.2 billion in the fourth quarter during its earnings call with investors Tuesday morning.