WRAPUP 2-Southwest Airlines mechanics dispute ends just as American's heats up

Southwest Airlines Co's mechanics union said on Tuesday its members had overwhelmingly voted to ratify a tentative contract agreement with the airline, ending seven years of labor negotiations fraught with legal disputes and flight disruptions. The agreement, which brought to a close one of the most disruptive labor disputes to hit a top-four U.S. airline in more than a decade, came a day after rival U.S. carrier American Airlines Group Inc said it was filing a labor-related lawsuit against its mechanics. Mechanics at both American and Southwest have complained that the airlines are moving to outsource maintenance work that has traditionally been done in-house.