The embroiled relationship between Southwest Airlines and the union that represents its mechanics, the Aircraft Mechanics Fraternal Association, took another turn March 8 as the union countersued the airline while the Federal Aviation Administration raised concerns about the fraught relationship.

Contract negotiations between Southwest Airlines Co. (NYSE: LUV) and the AMFA have dragged on for six years, and recent escalations between the two sides caught the eye of the FAA.

Ali Bahrami, a safety…

Houston Biz Journal
Union files counter suit against Southwest as FAA sends message to both sides