737 Flight Crew Operations Manual
Fuel -
Controls and Indicators
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 12.10.7
1 Fuel Measuring Stick
Allows comparison of fuel quantity or weight as determined from measuring stick
reading and fuel weight indicated by fuel quantity indicators:
• six fuel measuring sticks are installed in each main tank and four are
installed in center tank
• reading is obtained by withdrawing measuring stick from tank and
latching it magnetically to an internal float. Fuel depth is read where
stick passes through wing skin.
2 Manual Defueling Valve
Open – interconnects engine feed system and fueling station for:
• defueling
• ground transfer of fuel.
Closed – isolates engine feed system from fueling station.
3 Fueling Receptacle
Hose connection receptacle for single point fueling.
4 Solenoid Override
Mechanically opens solenoid operated valve. Fuel valve opens if fuel pressure is
available.
5 Fueling Valves
With the battery switch ON, and the refueling door open, fuel pressure opens
valve.
6 Refueling Power Control Relay
Door closed – proximity sensor deactivates power to fueling system.
Door open – the fueling system is powered and panel lights illuminate.
7 Test Gages & Fueling Panel
September 28, 2006
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