No engine/prop TBO on experimentals? Interesting. There isn’t a mandatory engine TBO on certifieds, in most of Europe, either. The UK CAA enforces the 6 year prop overhaul. I don’t know about the LAA… However the engine fund, based on 2k hrs, is of the order of 20% of the DOC, so not a massive factor, and the saving by going to say 2.5k hrs is negligible. What would be a...