EASA SIB 2012-20: WITHDRAWN - RECOMMENDATIONS NOT NEEDED ANYMORE

What to do

Aircraft type certificate holders are recommended to assess any potential effects of thickened de/anti-icing fluids on aircraft performance during take-off if uncertain. They should report any known cases that might result in unsafe conditions to EASA. Operators should continue to follow existing regulations and manufacturer guidance regarding the use of de/anti-icing fluids. No specific compliance deadlines are stated in this bulletin.

Summary

EASA Safety Information Bulletin SIB No. 2012-20 titled "WITHDRAWN - RECOMMENDATIONS NOT NEEDED ANYMORE" addresses the impact of thickened de/anti-icing fluids on aircraft performance. It specifically references a serious incident involving the Saab 340 aircraft at Helsinki/Vantaa Airport in 2010, where thickened fluids affected elevator control during take-off. The bulletin discusses regulatory context and certification specifications related to the use of these fluids on all aeroplanes.

What changed

This bulletin informs that the safety concern regarding thickened de/anti-icing fluids is no longer considered an unsafe condition warranting Airworthiness Directive action. Previously, EASA had issued AD 2010-0263 prohibiting thickened fluids on certain serial numbers of the affected aircraft type. The bulletin also notes the creation of a rulemaking task to potentially require type certificate holders to demonstrate no hazardous effects from these fluids, but no new mandatory requirements are introduced at this time.

Why it matters

This information is important for aviation professionals because it clarifies that while thickened de/anti-icing fluids can affect aircraft performance and controllability, current certification standards and regulations do not mandate additional design criteria. Operators and maintenance organizations need to be aware of potential impacts on aircraft handling during take-off when using these fluids and monitor any related safety issues. Compliance teams should note that no new Airworthiness Directive actions are currently required.