EASA SIB 2018-10R1: Super Absorbent Polymers Contamination of Jet Fuel

What to do

Affected stakeholders should review the content of EASA SIB 2018-10R1 and referenced industry publications, incorporate SAP contamination risks into their Safety Management Systems, and conduct risk assessments especially when refueling outside the EU. They should report any SAP-related events to type certificate holders, fuel providers, and competent authorities. Aerodrome operators should follow JIG Bulletin recommendations, and all parties should monitor ongoing industry developments and comply with future standards and deadlines as they are established.

Summary

EASA Safety Information Bulletin 2018-10R1 is an updated advisory addressing the contamination of jet fuel by Super Absorbent Polymers (SAP), which can cause engine power fluctuations and operational issues. This bulletin applies to all aircraft operators, aerodrome operators, CAMOs, and AMOs and highlights the risks associated with SAP migration from filter monitors into aircraft fuel systems. While no specific aircraft or engine models are named, the bulletin emphasizes the potential flight safety concerns recognized by aircraft and engine type certificate holders.

What changed

EASA SIB 2018-10R1 revises the original SIB 2018-10 from July 2018 by updating industry actions and recommendations to mitigate SAP contamination risks. It introduces both short-term measures such as limiting differential pressure on filter monitors and replacing certain filtration systems, and long-term plans for complete replacement of filter monitor systems with alternative filtration options. The revision also reflects delays in the transition timeline initially targeted for completion by the end of 2020.

Why it matters

This bulletin is important for aviation professionals because SAP contamination can lead to engine in-flight shutdowns or other operational problems, posing a flight safety risk. Operators, maintenance organizations, and aerodrome managers need to be aware of these risks to ensure proper fuel filtration and contamination control. Understanding and implementing the recommended mitigation measures helps maintain aircraft reliability and safety while complying with evolving industry standards.