During Type 2 preservation, what fuel is used?

During Type 2 preservation, what fuel is used?

• A. MIL-PRF-6081 Grade 1020
• B. Aviation gasoline
• C. Diesel fuel
• D. MIL-PRF-6081 Grade 1010

Answer: (D)

Type 2 preservation relies on circulating a dedicated preservation fuel through the aircraft’s fuel system to protect metal surfaces and elastomer components during storage. The fuel chosen for this purpose is MIL-PRF-6081 Grade 1010 because it is formulated specifically for preservation: it provides corrosion protection, is compatible with the materials used in fuel systems, and can be drained and purged from the system before returning to service. It is not aviation gasoline or diesel, which are not appropriate for turbine-fuel-system preservation. Grade 1020 is another MIL-PRF-6081 option, but the preservation procedure specifies Grade 1010, which is the formulation intended for this use.

Type 2 preservation relies on circulating a dedicated preservation fuel through the aircraft’s fuel system to protect metal surfaces and elastomer components during storage. The fuel chosen for this purpose is MIL-PRF-6081 Grade 1010 because it is formulated specifically for preservation: it provides corrosion protection, is compatible with the materials used in fuel systems, and can be drained and purged from the system before returning to service. It is not aviation gasoline or diesel, which are not appropriate for turbine-fuel-system preservation. Grade 1020 is another MIL-PRF-6081 option, but the preservation procedure specifies Grade 1010, which is the formulation intended for this use.