(The Center Square) – Friday marks the sixth day of Boeing firefighters being locked out by the aerospace company in a contract dispute. Negotiations between Boeing and the International Association of Fire Fighters Local I-66 representing 125 firefighters at some of the company’s commercial plane factories broke down last week Boeing locked out its firefighters and hired replacements on May 4 after workers rejected pay offers that their union described as 20% below the average at other fire departments in the Puget Sound region. “I’ve been with Boeing for about seven years, and I’ve been in t…