The Boeing worker trapped beneath the wheels of a 787 Dreamliner being towed at Paine Field has had both his legs amputated below the knee.

The Boeing worker who was crushed beneath the wheels of a 787 Dreamliner as it was towed along Paine Field a week ago has had both his legs amputated below the knee, according to two co-workers and a friend of the family.

The injured man is 30 years old and has been at Boeing since June 2010. The Seattle Times is not naming him at the family’s request.

The worker was part of an escort team walking alongside a Japan Airlines 787 on Feb. 3, and somehow he was caught under the wheels. He was dragged some distance and trapped beneath the wheels for more than 30 minutes, according to co-workers.

On Friday, according to a nursing supervisor at Harborview Medical Center, he remained in serious condition in intensive care and was undergoing further surgery.

Boeing spokesman Marc Birtel said the company and the Machinists union, along with the state’s Department of Labor and Industries and other agencies, are investigating how the accident happened.

Dominic Gates: 206-464-2963 or dgates@seattletimes.com