Okay III Corps, you've done the research that indicates SWA had roughly 450 days to comply with the AD.......and, they apparently couldn't get it done in that amount of time. So, self-reported that they hadn't done the AD. Continued to fly the airplanes......until they wound up with egg on the face and took all of those airplanes out of service until they complied with the AD.
I know SWA gets more flying out of their planes than is industry standard, but, must have been some down time in there somewhere for them to take them out of service and get it done.
Just took a look at an old story, and reportedly the checks took about 90 minutes to accomplish. So, in that 450 days, SWA couldn't find 90 minutes to git'r done and avoid grounding 44 airplanes (6 of which apparently did have fatigue cracks)
http://www.cnn.com/2008/US/03/12/sou...nes/index.html