Fuel — Grade UL94 Unleaded Aviation Gasoline
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators, maintenance organizations, and other stakeholders should accept Grade UL94 avgas meeting ASTM D7547 as suitable for use in aircraft and engines approved for Grade UL94 (ASTM D7592), Grade UL91 (ASTM D7547), or Grade 80 avgas. They should update relevant documentation and operating limitations accordingly and note that no additional maintenance actions are required when using this fuel. There are no specified compliance deadlines.
Summary
The FAA Special Airworthiness Information Bulletin SAIB: HQ-16-05R1 provides guidance on the use of Grade UL94 unleaded aviation gasoline (avgas) that meets ASTM International fuel specification D7547. It clarifies that this fuel grade is acceptable for use in aircraft and engines approved for Grade UL94 avgas meeting specification D7592, Grade UL91 avgas meeting specification D7547, and Grade 80 avgas. The bulletin applies broadly to aircraft operators, FAA repair stations, and other aviation stakeholders.
What changed
This revision adds additional information to the Introduction, Background, and Recommendations sections regarding the equivalency and acceptability of Grade UL94 avgas meeting ASTM D7547 compared to Grade UL94 avgas meeting ASTM D7592 and Grade UL91 avgas. It confirms that Grade UL94 avgas under D7547 meets or exceeds the performance requirements of Grade UL91 and Grade 80 avgas, expanding its approved use.
Why it matters
This bulletin matters because it provides clarity and assurance to aviation professionals that Grade UL94 avgas meeting ASTM D7547 can be safely used in a wide range of aircraft and engines previously approved for other avgas grades. This supports fuel availability and operational flexibility without requiring additional maintenance or inspections, simplifying compliance and fueling operations.
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