Boeing announced it had withdrawn its offer of a pay increase to striking workers after negotiations with union representatives reached an impasse.
The aviation giant accused the union of not seriously considering its proposals.
The International Association of Machinists and Aerospace Workers (IAM) union said Boeing was “committed to maintaining the non-negotiated offer” which it said was rejected by its members.
Last month, Boeing announced what it called its “best and final” offer to workers, which proposed a 30 percent raise over four years, less than the 40 percent demanded by the union.
“The union has made non-negotiable demands that go far beyond what can be accepted if we are to remain competitive as a company,” Boeing Commercial Airplanes President Stephanie Pope said in a letter sent to the employees.
“Given this position, further negotiations do not make sense at this stage and our offer has been withdrawn.”
But union representatives said Boeing was unwilling to negotiate the terms of the aircraft maker's latest offer.
Negotiators “attempted to address several priorities that could have led to an offer that we could put to a vote, but the company was not willing to move in our direction,” IAM said in a statement.
More than 30,000 Boeing workers in the northwest United States went on strike last month over wages and pensions.
In response to the strike that halted production of some of its planes, the company suspended the employment of tens of thousands of employees.
Boeing said U.S.-based executives, managers and employees would be asked to take a week off every four weeks for as long as the strike lasts.