Aircraft Hose Temperature Limitation Warning

Firesleeve DOES NOT increase the temperature rating of the hose.

Its sole purpose is to prevent flame penetration for a short period.

Aircraft Fuel Hose with Firesleeve Jacket Above

This fuel primer hose was completely burnt. When the pilot primed the engine he squirted fuel into the firesleeve.

This rubber hose is rated for 250 degrees F (121 C) and was located 4 inches from the exhaust stack. Firesleeve DOES NOT increase the temperature rating. There were plenty of burnt deterioration on the firesleeve to alert the pilot during preflight or the mechanic that there was a temperature problem.