The President of the Civil Aviation Authority has signed the “Guidelines no 9 on the time between overhaul for piston-based engines”. The Institute of Aviation undertook the task of developing the information for piston engines operations according to the technical state. The results of these studies may complement and develop the guidelines.
The presentation and further information can be found here: https://ilot.lukasiewicz.gov.pl/eksploatacja-silnikow/.