Union leaders aren't happy with Boeing's (NYSE: BA) proposed contracts for its engineers and technical workers, and have floated the suggestion of work slowdowns to make sure the company gets the message.

In a Wall Street Journal article yesterday, Ray Goforth, executive director of the Society of Professional Engineering Employees in Aerospace, is quoted as saying that engineers could begin slowdowns "within days." Although the initial numbers would be in the dozens, Goforth warned that hundreds of Boeing's 22,000 engineers and technicians could join the movement, the Journal reported.

Boeing currently has 671 net orders for 2012 from 24 customers, according to its website, with 99% being for the 737.