What's the point of doing a technical inspection if you don't know what the problem is? If (and I do mean IF) there's a design flaw, no technical inspection would help, nor would a technical inspection detect a software problem. Assuming that the aircraft has been maintained properly, this seems to me like it's just a PR move. Even if there's a maintenance problem, I'm skeptical that it would be detected by the same airline maintenance team that has been doing the routine maintenance all along on this bird, especially when it's a relatively new aircraft type in their fleet.