The European Union Aviation Safety Agency (EASA) issued a formal warning on Friday that potential shortages of Jet A-1 fuel—the standard aviation turbine fuel used across Europe—could force airports and airlines to switch to Jet A, a grade more common in the United States and Canada. The shift, driven by disruptions in the Middle East linked to the ongoing conflict involving Iran, would require significant operational adjustments and heightened safety protocols.
European airlines have already flagged that fuel shortages could materialise within weeks if the crisis persists. In response, the EU is exploring contingency measures, including increased imports of jet fuel from the United States. However, the technical differences between Jet A-1 and Jet A are subtle but critical: Jet A-1 has a lower freezing point, making it more suitable for high-altitude, long-haul flights over cold regions, while Jet A is widely used in North America under different climatic conditions.
Operational and Human-Factor Risks
EASA’s guidelines stop short of imposing mandatory rules, but they constitute a coordinated warning to the entire aviation chain—airlines, airports, fuel suppliers, and regulators—that the transition could introduce serious risks if not tightly controlled. The agency’s primary concern is not the safety of Jet A fuel itself, which is used daily across North America, but the potential for confusion during a mixed-fuel transition period.
“The simplistic assumption that ‘jet fuel is jet fuel’ could lead to dangerous operational errors,” EASA warns. The agency highlights scenarios where flight crews, fuel handlers, or electronic dispatch systems mistakenly believe an aircraft has received Jet A-1 when it has actually been fuelled with Jet A. Such errors could have “serious operational implications,” reducing safety margins during long-haul flights over cold regions, where fuel temperature limits are critical.
Human factors are a central theme in the document. EASA repeatedly warns that insufficient training or poor visibility of fuel-grade information could lead pilots and ground crews to misjudge fuel temperature limits, delay contingency actions, or operate outside safe parameters. The agency urges that the transition be managed with clear communication and robust procedures.
Recommendations Across the Fuel Chain
EASA’s recommendations cover the entire aviation fuel supply chain. Fuel suppliers are urged to maintain Jet A handling standards as close as possible to existing Jet A-1 procedures, including preserving fuel traceability. Airports are advised to introduce clear grade markings, publish fuel changes, and coordinate transitions across all fuel providers on site.
Airlines are encouraged to review crew training, dispatch procedures, flight-planning assumptions, and contingency planning for operations involving Jet A. Operators should also inform pilots whenever airports that historically supplied Jet A-1 begin offering Jet A instead. Aircraft manufacturers are asked to reassess the behaviour of mixed Jet A and Jet A-1 fuel loads inside aircraft tanks, particularly regarding freezing characteristics and warning thresholds.
The broader context of this warning is the escalating geopolitical tension in the Middle East. As the US has warned of 'devastating' force against Iranian attacks on Strait of Hormuz shipping, the risk of supply disruptions has intensified. European airlines have already been forced to cut thousands of flights due to the crisis, as reported in our earlier coverage.
Despite the seriousness of the warning, EASA stressed that the situation does not currently require new legislation or emergency operational orders. Instead, the guidelines are framed as a temporary and precautionary response to evolving market pressures. The agency’s approach reflects a desire to avoid overregulation while ensuring that the aviation sector remains prepared for a potential fuel shift.
For European travellers, the implications are indirect but significant. While no immediate disruptions are expected, the transition could affect flight planning, particularly for long-haul routes over the Arctic or other cold regions. Airlines may need to adjust schedules or fuel loads to account for the different characteristics of Jet A fuel. The situation underscores the interconnectedness of global energy markets and the vulnerability of European aviation to geopolitical shocks, as highlighted by the EU Climate Chief’s call for a radical energy shift.
