Boeing announced fourth quarter details showing it lost last year about $11.8 billion, the second heaviest loss in Boeing history.

Boeing has warned that it expected a fourth-quarter loss of about $4 billion to close a year marred by a production quality crisis, stricter regulatory scrutiny, supply chain delays and a crippling strike by US West Coast factory workers.

Boeing lost roughly $4 billion in the most recent quarter, when the jet maker was hit by a debilitating strike, suffered mounting losses in troubled U.S. government projects and incurred costs tied to sweeping job cuts rolled out at the end of the year.