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.

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

A week after Boeing machinists ended an almost two-month strike, the aerospace manufacturer said Tuesday that October saw it deliver the smallest number of planes in years.

Tuesday is the deadline for all Boeing machinists to report back to work after their nearly two-month-long strike ended last week.

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.