EASA SIB 2020-06
Use of DuPont Kathon FP 1.5 Biocide
Summary
EASA Safety Information Bulletin 2020-06 addresses the use of DuPont Kathon FP 1.5 biocide in turbine engine powered aircraft fuel systems. It highlights recent incidents involving engine thrust control loss linked to this biocide, emphasizing risks associated with overdosing and improper application. The bulletin applies to Type Certificate and Supplemental Type Certificate holders, maintenance personnel, aircraft owners and operators, and aerodrome operators.
What Changed
This bulletin introduces a notification about safety concerns related to Kathon FP 1.5 biocide use in aviation fuel, including documented adverse engine effects and a manufacturer-imposed halt on its use in aviation fuel products. It provides guidance on proper biocide application, dosage, and documentation consistency but does not mandate regulatory actions such as Airworthiness Directives or Safety Directives.
Why It Matters
The bulletin is important for aviation professionals because improper use of Kathon FP 1.5 biocide can lead to engine performance issues, including multi-engine thrust loss, which poses safety risks. Operators and maintenance teams must ensure correct biocide handling to prevent contamination and engine damage. Compliance with updated instructions from TC and STC holders is critical to maintain aircraft airworthiness and operational safety.
What To Do
Affected stakeholders should immediately cease use of Kathon FP 1.5 biocide in aviation fuel unless explicitly approved by the TC or STC holder. They must follow the latest maintenance instructions and ensure proper biocide dosage and application methods are used. TC and STC holders should update aircraft documentation to reflect biocide limitations and provide clear procedures to prevent fuel contamination and engine ingestion of biocide-treated fuel. Aerodrome operators should inform aircraft operators when fuel containing biocide is delivered.