Bob
One of the reasons that I am into this now is that I can see this amount of work resulting in a large backlog in the maintenance system and people having aircraft on the ground when we finally hit the buffers in June 2014.
I have heard this date banded about but can't find it in my copy of the 152 SID document as all the items for inspection have a time limit of 10,000 hours or twenty years ( some a third of this) I can't understand why some of this stuff has not been done already as the work can be spread over a number of checks before the end date.
I am guessing that the short sighted attitude of some will result in a lot of aircraft sitting around waiting for maintenance capacity or scrapped as uneconomic to put through the SID's due to years of neglect.