> These things are safety critical and ten days in a workshop is probably a reasonable heuristic for this thing has to be taken out of service and recommissioned from scratch.

This makes little sense. It's pretty reasonable that any machine that is sent for repair may take longer than expected in the workshop. Parts availability for one. Also, manpower shortages, scheduling (we don't need it back until next month) and so on all make this "heuristic" more likely be a scam. This idea that the manufacturer is entitled to a lifetime stream of repair revenue has to stop.

I shudder to think what would happen in the US if an auto manufacturer tried this heuristic on the average owner of a pickup truck.