Based on the Swiss action plan "Feinstaub", the report of the Federal Commission for Air Quality and results from its own project ECERT, the Federal Office for Civil Aviation (FOCA) increased international activity towards introduction of an aircraft gas turbine particle emission certification.

The FOCA Particle Sampling Project (PSP) helps to better quantify aircraft engine particle emissions and supports the development of measurement methodologies for a future particle emission certification of aircraft engines. Work is done in collaboration with the Institute of Combustion Technology of DLR (German Aerospace Center) and is internationally coordinated with EASA (European Aviation Safety Agency), ICAO (International Civil Aviation Organisation) and SAE (Society of Automotive Engineers).