Boeing Co. and the union representing 33,000 striking workers reached a tentative agreement on a new contract with help from the White House, underscoring the high stakes to end a work stoppage that has crippled one of the largest US exporters.

The proposal hammered out overnight in Seattle includes a wage increase of 35% spread over four years, a guaranteed annual bonus of at least 4% and an additional $7,000 bonus if workers approve the contract, IAM District 751 said in a statement on its website Saturday. A ratification vote is set for Oct. 23.

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“We look forward to our employees voting on the negotiated proposal,” Boeing said in a statement.

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The planemaker is moving forward with plans to cut 10% of its workforce ... The pain has also started to ripple through Boeing’s supply chain, with Spirit AeroSystems Holdings Inc. warning it would have to lay off 700 workers building components for the 767 and 777 programs.

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... As hourly workers are pushing for 40% pay increases and better retirement benefits, they’re driven by resentment over receiving paltry wage increases over the past decade while senior executives were richly rewarded.

The latest agreement addresses many of the frustrations that workers expressed with the company’s earlier proposals. But it doesn’t reinstate Boeing’s defined-benefit pension plan, a potential sticking point for some members.

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