What is the correct marking for fuel type on decals under the fuel filler caps on a Part 23 single-engine airplane?

What is the correct marking for fuel type on decals under the fuel filler caps on a Part 23 single-engine airplane?

• A. Is correct and complete.
• B. Should state the word 'Avgas' and the minimum grade.
• C. Should state the word 'Fuel', the minimum grade, and the capacity of the fuel.
• D. Should state the word 'Fuel' and the minimum grade.

Answer: (B)

The marking under the fuel filler cap should clearly identify the fuel type and the minimum grade required. For a Part 23 single-engine airplane, this means the decal should state the word AvGas and the minimum grade. This provides a concise, unambiguous reminder to fueling personnel about both the fuel type accepted and the lowest octane/lead grade that can be used with the engine. It keeps things simple and avoids implying anything about capacity. Using “Fuel” would be too generic and wouldn’t specify the fuel type, and including capacity isn’t part of the required decal content. If the engine requires 100 LL, the decal would indicate AvGas and 100 LL as the minimum grade.

The marking under the fuel filler cap should clearly identify the fuel type and the minimum grade required. For a Part 23 single-engine airplane, this means the decal should state the word AvGas and the minimum grade. This provides a concise, unambiguous reminder to fueling personnel about both the fuel type accepted and the lowest octane/lead grade that can be used with the engine. It keeps things simple and avoids implying anything about capacity. Using “Fuel” would be too generic and wouldn’t specify the fuel type, and including capacity isn’t part of the required decal content. If the engine requires 100 LL, the decal would indicate AvGas and 100 LL as the minimum grade.