CNN —. Striking Boeing workers on the US West Coast will vote on an improved contract offer on Monday, which includes a 38% pay rise over four years and a bigger signing bonus, their union said on Thursday.. More than 30,000 factory workers who produce Boeing’s strongest-selling 737 MAX commercial jet and other planes have been on strike since September 13 and have rejected two earlier offers from Boeing.. Boeing’s latest offer includes a $12,000 ratification bonus and the reinstatement of an annual bonus scheme that was not included in a previous offer, the International Association of Machinists and Aerospace Workers said in a statement.. IAM said it was endorsing the offer ahead of the vote.. Workers have been pushing for a 40% wage increase and the return of a defined-benefit pension that they lost a decade ago.. Last week, some 64% of the planemaker’s U.S. West Coast factory workers rejected an offer of a 35% general wage increase over four years that was not endorsed by the union.. Boeing shares (BA) rose 2.5% in after-hours trading. Shares had closed down 3.2% earlier on Thursday.
