Boeing's U.S. West Coast factory workers walked off the job on Friday after overwhelmingly rejecting a contract deal, halting production of the planemaker's strongest-selling model and sending shares down over 2%.

Boeing faces major production disruption as 30,000 workers strike after rejecting a union contract, impacting key 737 Max and 777 aircraft output.

The strike, set to begin at midnight Pacific time on Friday, will halt production of Boeing's best-selling jet, the 737 MAX

Aerospace firm Boeing doesn’t expect to reach production of 42 737 MAX jets a month until early 2025, about six months later than originally planned.

Boeing has pushed back its target date to reach a milestone production level for its 737 MAX jet, according to a report Tuesday.