Unionized factory workers at Boeing are voting on Monday whether to accept a contract offer or to continue their strike. The walkout has lasted more than seven weeks, shut down production of most Boeing passenger planes and cut off a key source of cash for the company.

Boeing says it will be several weeks before it fully resumes building passenger planes, as factory workers return following a strike that lasted nearly two months.

Tens of thousands of striking Boeing machinists voted Monday to ratify a new contract, ending their seven-week work stoppage.

If Boeing machinists vote down the company's pay offer for a third time it could drive Boeing deeper into financial uncertainty.

After striking for almost two months, workers will return to factory floors in the Pacific Northwest, but must ensure safety procedures are followed as it begins building 737 jetliners.