Fuel Scavenge Flow Indicator/Check Valve Installation 500
28-15-31 Figure 401 Feb 20/89
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
PRESSURE FUELING SYSTEM - DESCRIPTION AND OPERATION
1. General
A. The pressure fueling system provides a rapid means of filling the fuel tanks on the aircraft. The pressure fueling system distributes fuel under pressure from the fueling station in the right wing to the fuel tanks, through a system of fueling lines and valves (Fig. 1 and 2). The fueling rate is 500 gpm at a delivery pressure of 55 psig.
B. The fueling station is equipped with a fueling receptacle, a fueling manifold, a fueling power control switch, three fueling station illumination lights, one fueling indicator test switch, three fueling shutoff valves, fueling line check valves, fueling shutoff valve switches, fueling quantity indicator s and indicator lights (Fig. 1). Each tank is equipped with a float switch to provide automatic fueling shutoff when a fuel tank becomes full of fuel.
C. The fueling operation consists of coupling the fueling hose nozzle to the fueling receptacle, opening the electrical fueling shutoff valves and pumping fuel into the fuel tanks. The fueling quantity indicators allow the servicing personnel to fill the tanks to a predetermined level when a full fuel load is not required.
2. Fueling Receptacle
A. A single fueling receptacle mounted on a manifold on the forward face of the wing front spar provides the means of connecting the fueling hose to the pressure fueling system (Fig. 1). The receptacle consists of a fueling hose adapter connected to the fueling receptacle manifold and a cap and a spring-loaded valve. The fueling hose adapter has mating lugs which couple with and secure the fueling hose. When the hose is coupled to the adapter, a plunger in the hose nozzle opens the spring-loaded valve to allow fuel to flow into the tanks.
B. When not in use, the fueling receptacle is covered and sealed by a receptacle cap. The cap engages the lugs on the fueling hose adapter in the same manner as the fueling hose; when the cap is in position, the seal in the cap is forced against the adapter to seal the inlet to the adapter. To prevent loss, the cap is secured to the adapter with a piece of chain.
526
May 01/01 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 28-21-0 Page 1
F94777 F94799 F94807
Pressure Fueling System Component Location 5C8
28-21-0 Figure 1 (Sheet 1) Aug 01/96
Page 2
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
5C8 Pressure Fueling System Component Location
Aug 01/96 Figure 1 (Sheet 2) 28-21-0
Page 3
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
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