It doesn't. They might do that during an IRAN (Inspect and Repair As Necessary) which is essentially a full engine teardown, easily 5 figures. Certainly not don

It doesn't. They might do that during an IRAN (Inspect and Repair As Necessary) which is essentially a full engine teardown, easily 5 figures. Certainly not done every 200 hours. Maybe it's a conflation of many piston aircraft engine manufacturers' recommendation for a TBO (time between overhauls), which is often around 2000 hours. This is essentially a full rebuild of the engine. However, in many cases it's not regulatory and more of a suggestion (there are exceptions, like certain commercial use of the aircraft).