(4)
AMM 28-25-05/401, APU Fuel Line and Shroud
C.
Access
(1)
Location Zones
133 Wing Center Section (Left)
134 Wing Center Section (Right)
(2)
Access Panels
134AZ Center Tank Access Door (Right)
134BZ Baffle Door
134CZ Baffle Door
134DZ Baffle Door
D.
Procedure
S 944-022
WARNING: OBEY THE FUEL TANK ENTRY PRECAUTIONS (AMM 28-11-00/201).
_______ FAILURE TO OBEY THE FUEL TANK ENTRY PRECAUTIONS COULD CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Obey the fuel tank entry precautions (AMM 28-11-00/201).
S 014-023
(2)
Go into the fuel tank.
S 424-024
(3)
Put the housing of the APU DC fuel pump (5) in position on the rear spar with a new O-ring in between.
S 424-025
(4)
Align the housing (5) with the APU fuel shutoff valve supply line (1) and the APU fuel supply inlet line (7).
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(5) S 424-042From out of the fuel tank, install the washers (14) and the bolts (13) through the rear spar into the housing (5).
(6) S 434-043From in the fuel tank, with a new O-ring, connect the flexible half coupling (6) between the APU fuel supply inlet line (7) and the housing (5) (AMM 28-25-05/401).
(7) S 434-044With a new O-ring, connect the flexible half coupling (8) between the APU fuel shutoff valve supply line (1) and the housing (5) (AMM 28-25-05/401).
(8) S 414-026Install the baffle doors, 134DZ, 134CZ, and 134BZ (AMM 06-41-00/201).
(9) S 414-027Install the center tank access door, 134AZ (AMM 28-11-02/401).
S 434-028
(10) Do the Install the Motor/Impeller of the APU DC Fuel Pump procedure.
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APU FUEL SHUTOFF VALVE - REMOVAL/INSTALLATION
_____________________________________________
1. General_______
A. An APU fuel shutoff valve is installed on the rear spar of the center fuel tank, approximately 2 feet to the left of the body centerline. The APU fuel shutoff valve lets the APU DC fuel pump pump fuel to the APU but does not let fuel pump to the APU when the APU does not operate.
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