Just thought I'd toss out a FYI post. I'm in process of buying a Piper and they completed the eddy current inspection on the wing spar. I wanted to be there to look at the test equipment and talk to the NDI rep. It passed with no issues. So out of 50 planes he has completed this test on they have found 2 that had cracks. I think he said one plane was to become a paperweight while they parted it out and the other was getting replacement spars. It isn't a large percentage of the fleet but was interesting. The 2 oldest planes had just over 24,000 hours and around 15,000 hours. Neither of the older planes failed.