A group of passengers suing Carnival cruise lines for damages after an engine fire left their ship adrift for days are asking the company to pay $5,000 a month for the rest of their lives for medical bills and mental anguish. A lawsuit brought by 33 passengers of the ill-fated 2013 voyage could change how cruise lines insulate themselves from legal actions, according to maritime legal experts. A second pending lawsuit with three-times as many plaintiffs has the potential to further undo the advantageous legal position cruise lines have long enjoyed. Both cases stem from a February 2013 incident when the Carnival Triumph broke down after launching from Galveston, Texas for what was to be a four-day cruise with a stop in Cozumel, Mexico.