Boeing said it has resumed production across its range of aircraft programmes at factories in the Pacific Northwest after they were shut down for weeks because of a lengthy workers’ strike, which has contributed to a backlog of deliveries to the planemaker’s customers, including Ryanair.

Following the resumption of the output of its popular 737 model last week, Boeing has now also taken up building the larger 767 and 777 aircraft again, Stephanie Pope, the head of the company’s commercial jet division, said in a post on LinkedIn.

“We have taken time to ensure all manufacturing team-mates are current on training and certifications while positioning inventory at the optimal levels for smooth production,” Ms Pope said in the post.

Returning to output is crucial for Boeing as the company tries to stabilise its finances battered by a strike that stretched out for more than 50 days.

The company has cautioned that getting production back to speed will take time as some workers need to be recertified for their tasks and components may be out of position.

Boeing said last week that aircraft deliveries in November were at the lowest in four years, with all of the planes that were handed over built before the strike and delivered out of inventory.

While the 787 Dreamliner model was not affected by the strike, since it is manufactured at a non-union factory complex in South Carolina, the model has also been hampered by shortages of cabin equipment and other components. – Bloomberg