After strikers' healthcare benefits were cut off, the president of the International Association of Machinists (IAM) and Aerospace Workers said Boeing's new leader must be 'truly involved' in reaching a settlement.

Boeing's largest union urged new CEO Kelly Ortberg on Tuesday to get more involved in contract negotiations to end a strike by around 33,000 U.S. West Coast workers, after the U.S. planemaker cut off their healthcare benefits.

Boeing's (NYSE:BA) biggest union said after the aviation giant cut off the health benefits of 33,000 striking workers that new Chief Executive Kelly Ortberg should be engaged in contract negotiations that would end the work stoppage.