TM 5-3805-280-24-2
Fuel System Operation and Tests
RESTRICTED FUEL RETURN LINE CHECK
115
34
A--Fuel Leak-Off Line
4. If the return line isn't restricted, the compressed air
This check will help determine if the fuel return line is
bubbling into the fuel tank should be audible
restricted.
through the tank filler neck.
1. Disconnect fuel leak-off line at the engine (A).
5. If no air bubbling through the tank is audible,
completely check the fuel return line for any
2. Remove fuel tank cap.
possible restrictions.
3. Force compressed air through the fuel return line
while listening at the fuel tank filler neck
DPSG,OUO1004,289 1923JUL981/1
13-561
