4.
Intermediate refueling
Intermediate refueling can be performed through the refueling coupling (500QS), with the “REAR” switch (63Q) set to the “LO” position. The low-level float valves (L605QS)/(R605QS)/(M605QS) then control the transfer valves (L615QS)/(R615QS)/(M615QS).
The fuel truck delivers fuel into the refueling manifold (516QS) and the fuel is then transferred into the feeder tanks through the transfer valves.
Refueling is automatically stopped when the fuel reaches the normal level in the feeder tanks.
Refueling of the wing tanks and centerwing tank is performed by setting the “TOTAL REAR” switch/light (48E) to the “TOT” position.
EIED 2 (20EA) displays the quantity of fuel contained in each feeder tank and in the corresponding front tank.
5.
Suction Defueling