Intentionally
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Copyright . The Boeing Company. See title page for details.
12.TOC.0.2  March 28, 2005

737 Flight Crew Operations Manual

Fuel Control Panel
ON 
CTR 

FUEL 
PUMPS 

Engine Valve Closed (ENG VALVE CLOSED) and SPAR VALVE CLOSED Lights
Extinguished – related engine or spar fuel shutoff valve is open. Illuminated (blue) –
.  
bright – related engine or spar fuel shutoff valve is in transit, or valve
position and engine start lever or engine fire warning switch disagree.

.
dim – related engine or spar fuel shutoff valve is closed.

FUEL Temperature (TEMP) Indicator
Indicates fuel temperature in No. 1 tank.
Copyright . The Boeing Company. See title page for details.
Fuel -Controls and Indicators 737 Flight Crew Operations Manual

Crossfeed VALVE OPEN Light
Extinguished – crossfeed valve is closed.
Illuminated (blue) –
.  
bright – crossfeed valve is in transit, or valve position and CROSSFEED
selector disagree.

.
dim – crossfeed valve is open.

FILTER BYPASS Lights
Extinguished – fuel filter operating normally.
Illuminated (amber) – impending fuel filter bypass due to a contaminated filter.

CROSSFEED Selector
Controls fuel crossfeed valve.
Closed – isolates engine No. 1 and No. 2 fuel feed lines.
Open – connects engine No. 1 and No. 2 fuel feed lines.

Center Tank FUEL PUMP LOW PRESSURE Lights YA613 - YC413, YK101 - YK104
Illuminated (amber) – fuel pump output pressure is low and FUEL PUMP switch is ON.
Note:  With both Center (CTR) tank FUEL PUMP switches ON, illumination of both LOW PRESSURE lights illuminate MASTER CAUTION and FUEL system annunciator lights. Illumination of one LOW PRESSURE light illuminates MASTER CAUTION and FUEL system annunciator lights on MASTER CAUTION light recall.
Note:  With one CTR tank FUEL PUMP switch OFF, illumination of opposite CTR tank LOW PRESSURE light illuminates the MASTER CAUTION and FUEL system annunciator lights.
Extinguished – fuel pump output pressure is normal, or FUEL PUMP switch is OFF.
Copyright . The Boeing Company. See title page for details.
12.10.2   June 1, 2005

Fuel -Controls and Indicators 737 Flight Crew Operations Manual

Center Tank FUEL PUMP LOW PRESSURE Lights
Illuminated (amber) – fuel pump output pressure is low and FUEL PUMP switch is ON.
Note:  With the Center (CTR) tank FUEL PUMP switches ON, continuous illumination of one LOW PRESSURE light for 10 seconds illuminates MASTER CAUTION and FUEL system annunciator lights.
Extinguished – fuel pump output pressure is normal, or FUEL PUMP switch is OFF.

FUEL PUMP Switches
ON – activates fuel pump. OFF – deactivates fuel pump.
YD651 - YD655
Note:  When a center tank fuel pump switch is set to OFF, the auto shutoff logic for that pump is reset. When the center tank fuel pump switch is set to ON after being OFF, the pump will again activate until the switch is set to OFF or auto shutoff logic deactivates it.

Main Tank FUEL PUMP LOW PRESSURE Lights
Illuminated (amber) – fuel pump output pressure is low, or FUEL PUMP switch is OFF.
Note:  Two LOW PRESSURE lights illuminated in same tank illuminate MASTER CAUTION and FUEL system annunciator lights. One LOW PRESSURE light causes MASTER CAUTION and FUEL system annunciator lights to illuminate on MASTER CAUTION light recall.
Extinguished – fuel pump output pressure is normal.
Copyright . The Boeing Company. See title page for details.
Fuel -Controls and Indicators

Fuel Quantity Indications

FUEL Quantity Indicators
Displayed (white) – indicates usable fuel in related tank:
. standby AC power is required.
Copyright . The Boeing Company. See title page for details.
12.10.4  March 28, 2005

Fuel -Controls and Indicators 737 Flight Crew Operations Manual
Fuel Alert Indications

Fuel LOW Alert
Displayed (amber) –
.
fuel tank quantity less than 907 kgs in related main tank

.
display remains until fuel tank quantity is increased to 1134 kgs The fuel quantity arc and digits on tank(s) with low fuel quantity turn amber.

Copyright . The Boeing Company. See title page for details.
Fuel -Controls and Indicators 737 Flight Crew Operations Manual

Fuel Configuration (CONFIG) Alert
　
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