(Reuters) -Boeing CEO Kelly Ortberg laid out a turnaround plan on Wednesday, including a push for a "fundamental culture change," as the struggling planemaker grapples with a crippling strike, mounting debt and heightened cash burn.

Boeing Co. Chief Executive Officer Kelly Ortberg provided an unvarnished view of his company at a crossroads, absorbed by challenges ranging from huge debt to serious performance lapses that it needs to address before it can consider developing a new aircraft.

"We need to right size and be efficient, and I think we need to continue to do that as we go forward," he told CNBC in an interview