MD-11 Flight Crew Operations Manual
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Fuel -
Controls and Displays
Fuel.30.2
• Crossfeed valves commanded closed.
• Tank 1 and 3 transfer pumps off.
• Tank 2 transfer pump remains in previous state.
• Aux tank L and R transfer pumps on.
• Tail tank transfer pumps on.
• Tail tank alt pump off.
2. MANF DRAIN Switch - amber
The MANF DRAIN switch is a momentary switch that controls the main tank
1 and 3 manifold drain/outboard fill valves. In the manual mode the switch
operates both valves together for manual drain function. The switch has no
effect in the auto mode. In the auto mode the valves are controlled
individually by the fuel system controller as alternate fill valves or together
for manifold drain function.
Illuminates amber in manual mode when valves are commanded open and
illuminates in auto mode only when the valves are used to drain the manifold.
The FUEL MANIFOLD DRAIN alert is displayed when DRAIN is
illuminated. DRAIN will extinguish when the FSC commands the outboard
fill valves closed.
The switch is guarded and safetied.
3. TAIL TANK ALT PUMP Switch - blue/amber
The TAIL TANK ALT PUMP switch is a momentary switch that turns the
tail tank alternate pump on and off when the fuel system is in the manual
mode. The switch has no effect in the auto mode.
ON illuminates blue when the tail tank pump is commanded on.
In manual mode, LOW illuminates amber when the tail tank pump is
commanded on and has low pressure.
This pump is powered by the right emergency ac bus and supplies engine 2
exclusively.
4. TAIL TANK Quantity Readout
Total fuel quantity in tail tank.
5. TRANS ON/LOW Switch (Tail Tank) - blue/amber
The tail tank TRANS switch is a momentary switch that turns the tail tank
transfer pumps on and off when the fuel system is in the manual mode. When
on, the upper aux tank fill valve opens to transfer fuel into the upper aux tank.
The switch has no effect when the system is in the auto mode.
ON illuminates blue when the transfer pump has been commanded on.
October 02, 2006
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