Boeings assembly line in Washington state. (Photo: Boeing)

SEATTLE — Washington Gov. Jay Inslee gave final approval Monday to a package of tax breaks for Boeing Co. in hopes of landing the companys new 777X, signing legislation at Seattles Museum of Flight at Boeing Field.

Now attention is focused on a contract vote later this week by the Machinists unio.

Boeing has sought the tax benefits — valued at $9 billion through 2040 — and a broad new contract with machinists as part of a long-term deal to build the 777X in the Puget Sound. In unusual swiftness, lawmakers returned to Olympia last week for a special session dedicated to Boeing, approving the legislation ahead of the unio vote.

Some machinists have indicated opposition to the contract because it includes concessions. Political leaders, including many Democrats who are closely aligned with unioized workers, have declined to encourage machinists how to vote but have asked them to consider the broader impact on jobs and future generations.

I do know that the competition is very tough and that there are a lot of people rooting for our failure, said U.S. Sen. Patty Murray, D-Wash., when asked about the unio vote.

Asked whether the machinists could get another chance if they reject the current contract proposal, Murray said Boeing was moving quickly on its decisions: We have the opportunity to build this plane here. I hope we take it.

Tom Wroblewski, president of the Machinists District 751, stood with Boeing representatives and political leaders at the bill signing Monday. He declined to give his opinion on the contract and said it was a very emotional decision for members to make. He said they need to consider whats best for their families, including their grandchildren.

Whats at stake here is jobs for the future — jobs to build the 777x for 20 to 25 years, Wroblewski said.

unio members are set to vote Wednesday.

Ray Conner, CEO of Boeing Commercial Airplanes, said the companys preference is to stay in the Puget Sound and a positive vote by the machinists this week makes that decision easy. But he said its not a bluff that the company could move the 777X line elsewher.

My sincere hope is that we dont even have to even think about doing this, Conner said.

Along with extending tax breaks to 2040, lawmakers also approved millions of dollars for training programs for aerospace workers. Lawmakers have also said that Boeing supports the development of a large transportation package, and the Legislature is still exploring a plan valued at about $10 billion.