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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
28-21-00-002
PRESSURE FUELING SYSTEM - COMPONENT LOCATION
PRESSURE FUELING SYSTEM - COMPONENT LOCATION
EFFECTIVITY
GUN 001-099, 101-115 28-21-00
Page 11
D633A101-GUN Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
28-21-00-002
PRESSURE FUELING SYSTEM - COMPONENT LOCATION
PRESSURE FUELING SYSTEM - COMPONENT LOCATION
EFFECTIVITY
GUN 201-999 28-21-00
Page 12
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
28-21-00-002
General
The P15 fueling panel has these components:
* Fueling valve open lights
* Fueling indication test switch
* Fueling valve control switch
* Fuel indicators
* Fueling power control switch.
Fueling Valve Open Lights
The blue valve position lights come on when the fueling shutoff
valve solenoids have power.
Fueling Indication Test Switch
The fueling indication test switch is a three-position switch. The
switch is spring loaded to the center (neutral) position. When
the switch is in the FUEL DOOR SWITCH BYPASS position, the
power control relay receives ground. The normal ground for
this relay is through the fueling power control switch. This relay
controls power for fueling.
When the switch is in the TEST GAUGES position, the fuel
indicators do a display test. Fuel quantity in the flight
compartment does not change during this test.
The FUEL DOOR SWITCH BYPASS position and the TEST
GAUGES position are momentary positions.
Fueling Valve Control Switches
The fueling valve control switches are two-position switches.
The fueling valve solenoid energizes when you put the switch in
OPEN and power is available. The valve opens if fuel pressure
is available at the fueling manifold. In the CLOSED position, the
fueling valve solenoid de-energizes and the valve closes.
Fuel Indicators
The indicators are amber LED displays. They use 28v dc to
operate.
GUN 201-999
The fuel indicators show fuel quantity in a digital format. Fuel
quantity shows in pounds.
GUN 001-099, 101-115
The fuel indicators show fuel quantity in a digital format. Fuel
quantity shows in kilograms.
GUN 201-999
The preselect switch lets you select a total fuel tank quantity at
which fueling stops. During fueling, when the fuel quantity in the
fuel tank equals the preselect quantity, the fueling valves close.
GUN ALL
PRESSURE FUELING SYSTEM - P15 FUELING PANEL
EFFECTIVITY
GUN ALL 28-21-00
Page 13
D633A101-GUN Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
28-21-00-003
The indicators have a tank overfill indication. The fuel quantity
indication will blink on and off at a one second interval if the
quantity is more than the rated capacity of that tank. Flight
compartment fuel quantity indication does not blink.
Fueling Power Control Switch
The fueling power control switch closes to supply an electrical
ground for the R11 fueling power control relay. The control
switch closes when the fueling station door opens and the
magnet is near the switch. The switch opens when the door
closes and the magnet goes away from the switch.
Training Information Point
If the fueling station door is open and the fueling station does
not have power, move the fueling indication test switch to the
FUEL DOOR SWITCH BYPASS position. This supplies hot
battery bus power to the fueling station.
PRESSURE FUELING SYSTEM - P15 FUELING PANEL
EFFECTIVITY
GUN ALL 28-21-00
Page 14
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
28-21-00-003
PRESSURE FUELING SYSTEM - P15 FUELING PANEL
PRESSURE FUELING SYSTEM - P15 FUELING PANEL
EFFECTIVITY
GUN 001-099, 101-115 28-21-00
Page 15
D633A101-GUN Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
28-21-00-003
PRESSURE FUELING SYSTEM - P15 FUELING PANEL
PRESSURE FUELING SYSTEM - P15 FUELING PANEL
EFFECTIVITY
GUN 201-999 28-21-00
Page 16
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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