Southwest Airlines releases causes behind massive holiday meltdown

DALLAS — After a winter debacle that left tens of thousands of passengers stranded in airports this past holiday season, Southwest Airlines has issued the reasons behind those massive delays and cancellations. The Dallas-based airline conducted an internal review in March to determine what went wrong in the days after Christmas that led to thousands of flights being canceled and even a federal investigation. Officials with Southwest released the key root causes in addition to an action plan going forward to ensure what happened doesn’t take place again. Some of the new equipment includes new deicing trucks, pads and ground…