EASA SIB NE-14-28: Use of NATO Grade F-24 Jet Fuel

What to do

Operators and maintenance organizations should verify that the FSII concentration in any NATO grade F-24 jet fuel batch meets their aircraft's operating limitations before use. They should avoid using F-24 fuel in aircraft or engines that prohibit FSII and prevent exposure of ground-based filter monitors to F-24 fuel. No document revisions are required, but fuel handling procedures should be updated to segregate defueled F-24 fuel from airport fuel supplies.

Summary

The FAA Special Airworthiness Information Bulletin SAIB: NE-14-28 provides guidance on the use of NATO grade F-24 jet fuel in aircraft and engines certified for ASTM International D1655 grade Jet A fuel. It clarifies that F-24 jet fuel meets the performance requirements of Jet A fuel and is acceptable for use provided the fuel system icing inhibitor (FSII) concentration complies with the aircraft's operating limitations. This bulletin applies broadly to aircraft operators, FAA repair stations, and foreign civil aviation authorities.

What changed

This bulletin introduces the acceptance of NATO grade F-24 jet fuel as an alternative to ASTM D1655 grade Jet A fuel for approved aircraft and engines. It specifies that the FSII concentration in F-24 fuel must meet aircraft-specific limitations and highlights operational considerations related to FSII additives and ground-based filter monitors. The bulletin does not mandate changes but provides recommendations for safe and compliant use.

Why it matters

This information is important for aviation professionals because it expands fuel options for aircraft certified for Jet A fuel, potentially improving fuel availability and logistics. Operators and maintenance personnel must ensure FSII concentrations are compatible with their aircraft to avoid operational issues. Additionally, awareness of filter monitor interactions with FSII-containing fuel helps prevent ground equipment contamination and ensures fuel quality control.