Boeing posted a fourth-quarter loss of $3.8 billion on Tuesday as a machinists strike and other problems continued to plague the troubled aircraft manufacturer.

US aerospace giant Boeing Co's loss widened in the fourth quarter compared to the same period of the previous year, it reported on Tuesday. The company's bottom line totalled -$3.923 billion, or -$5.46 per share.

In an interview with The Seattle Times after reporting grim financial results early Tuesday, Kelly Ortberg said that six months into the job, he thinks Boeing is "starting to turn the corner."

Boeing Co. Chief Executive Officer Kelly Ortberg said he will realign the company around key business lines and cleave off fringe assets, setting in motion a portfolio overhaul after the US planemaker emerged from a tumultuous and deeply unprofitable year.