WICHITA, Kan. (AP) — A federal judge ruled Tuesday that a trial is necessary to decide claims brought against Boeing by two unions over pension and retiree medical benefits arising from the company's 2005 sale of its commercial aircraft operations in Kansas and Oklahoma.

In a 49-page decision, U.S. District Judge Monti Belot rejected for the most part requests by both sides for summary judgment, although he did side with Boeing on some minor claims.

Among issues to be decided is the meaning of "layoffs" as it relates to early retirement and retiree medical benefits stemming from the sale. Belot also ruled that the question of whether Boeing breached its collective bargaining agreements should be decided through trial.