EASA SIB 2015-27
Potential Adverse Effect of Alkali Organic Salt-based Aircraft De-Icing Fluids on Anti-Icing Holdover Protection and Potential Aircraft Corrosion
Summary
EASA Safety Information Bulletin 2015-27 addresses the potential adverse effects of alkali organic salt-based Type I aircraft de-icing fluids on anti-icing holdover protection and possible aircraft corrosion. While these fluids meet SAE AMS 1424 standards, they may reduce the viscosity of anti-icing fluids, shortening holdover times, and cause galvanic corrosion on aircraft metallic parts. This bulletin is relevant to aeroplane operators and de-icing service providers during winter ground operations.
What Changed
This new Safety Information Bulletin introduces awareness of the risks associated with alkali organic salt-based Type I de-icing fluids, highlighting their impact on anti-icing fluid performance and potential corrosion issues. It does not mandate regulatory changes but provides updated guidance and recommendations for fluid selection and operational procedures.
Why It Matters
Understanding these effects is critical for aviation professionals to maintain effective anti-icing protection and prevent premature aircraft corrosion, which can lead to increased maintenance costs and safety risks. Operators and maintenance teams must consider these factors to ensure compliance with safe de-icing practices and aircraft longevity.
What To Do
De-icing service providers and operators should evaluate the use of alkali organic salt-based Type I fluids in consultation with fluid manufacturers and aircraft type certificate holders. Operators should avoid these fluids when possible or implement mitigating measures such as thorough washing-off during two-step de-icing and contamination checks before takeoff. Ground procedures and crew training should be updated accordingly. No compliance deadlines are specified.