Found out yesterday the flying club I'm in with an RV7a is grounded. Turns out the engine by SN has a crank that is affected by a lycoming SB and then AD from 2006. And for the past 13 or 14 years all the other mechanics and the pre buy mechanic just went off the original guy saying "not applicable". Which I guess it was...but it is affected buy the revised SB/AD that came out later and added a whole bunch of new engines. This type of crap is what really annoys me...company L makes a crappy part. They find this out a few years after they make said crappy part. Tell people they need, MUST!, replace this part. Then they want the customer to pay for it. Now to be fair at the time they had a good deal on new parts for this. But that ended 12 years ago as it was a very limited time deal. So we are stuck paying. And side 2 of this coin if anyone of the other mechanics earlier had bothered to due their job...we wouldnt have bought a plane with a subject crank. Can they be made to pay for the repair...probably not. Will there be any ramification against them as licensed mechanics...probably not. Anyone have a spare good crank for a Lycoming IO360 A1B6 laying around? I was told new cranks are ~1 year out. We may just go to a new engine....those are about 5 months out at Van's. Now i know why people want to Subaru and corvair power planes.