EASA SIB 2026-04
Aviation Turbine Fuel – Use of Jet A Grade Fuel in a Jet A-1 Environment
Summary
EASA Safety Information Bulletin 2026-04 addresses the potential use of Jet A grade aviation turbine fuel in environments traditionally supplied with Jet A-1 fuel, primarily in Europe. It highlights operational, airworthiness, and human factor risks associated with introducing Jet A fuel, which differs in freezing point and electrical conductivity from Jet A-1. The bulletin is relevant to aviation fuel suppliers, aerodrome operators, aircraft operators, and other stakeholders involved in fuel handling and supply chains.
What Changed
This bulletin introduces guidance and recommendations for managing the transitory situation where Jet A fuel may be used in Jet A-1 environments due to supply constraints. It outlines the need for coordination among fuel suppliers, infrastructure operators, and airports to avoid operational risks and fuel grade confusion. The document does not authorize or endorse the permanent use of Jet A in Europe but provides interim recommendations to ensure safety and quality control.
Why It Matters
The introduction of Jet A fuel in Jet A-1 environments can impact flight safety due to differences in fuel properties, such as a higher freezing point and lower electrical conductivity, which may affect engine performance and fuel system operations. Aviation professionals must manage these risks to prevent fuel grade confusion, ensure compliance with aircraft fuel specifications, and maintain safe operational procedures. Proper communication and training are essential to mitigate human factor risks and maintain fuel quality standards.
What To Do
Affected stakeholders should continue handling Jet A fuel in alignment with Def Stan 91-091 requirements except for specific parameters like freezing point and total acidity. They must use the AFQRJOS Checklist Issue 36B or demonstrate equivalent fuel quality control procedures. Coordination among all parties in commingled fuel systems is required, and training materials should be updated to address fuel grade differences and operational limitations. No specific compliance deadline is stated, but the bulletin will be revised or cancelled before the next winter season based on developments.
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