The article says that "as people have left the company and have retired" and "shifted around" indicating that there was likely not a concerted effort to clean out the AA execs that were part of the problem that caused the FAA whistleblower to charge that the FAA was not being strong enough in ensuring AA follow FAA safety procedures.
But let's be clear that AA is trying very hard to avoid paying the $24million in the FAA fine or as much as possible... moving a few people around could go a long ways toward convincing the FAA that the problem has been corrected.. or at least that it won't happen again.
Remember that WN, which had the largest FAA fine prior to the AA MD80 proposed fine, cleaned out a fair number of their own maintenance personnel as well.
But both of these instances show that, as much as some people would like to believe, in-house maintenance is not necessarily of the highest quality.