EASA Regulations for Stemme Ag S12

EASA AD 2025-0155

Fuel — Fuel Pump Set and Drainer Assembly / Copper Sealing — Replacement

EASA Airworthiness Directive 2025-0155 is issued for Stemme S12 powered sailplanes, addressing a fuel leak issue related to the fuel pump set and drainer assembly copper sealing rings. The directive mandates replacement of the affected copper sealing rings with improved FKM (Viton®) sealing rings to ensure continued airworthiness and safety of these aircraft.