S 415-056
(16)
Close the right APU access door, 316AR (AMM 06-42-00/201).
S 865-057
(17)
Remove DO-NOT-OPERATE tag from the APU master control switch on the P5 panel.
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757 MAINTENANCE MANUAL
DC FUEL PUMP - REMOVAL/INSTALLATION
___________________________________
1. General
_______
A. An APU DC fuel pump is installed on the rear spar of the center fuel tank, approximately three feet to the left of the body centerline. The APU DC fuel pump supplies the APU with fuel during an electrical power failure or a fuel boost pump failure.
B. This procedure contains four tasks. The first task removes the motor impeller of the APU DC fuel pump. The second task installs the motor impeller of the APU DC fuel pump. The third task removes the housing of the APU DC fuel pump. The fourth task installs the housing of the APU DC fuel pump.
TASK 28-25-01-004-052
2. Remove the Motor Impeller of the APU DC Fuel Pump (View B, Fig. 401)
_________________________________________________
A. References
(1)
AMM 28-25-03/401, APU Fuel Pump Pressure Switch
(2)
AMM 32-00-15/201, Landing Gear Door Locks
(3)
AMM 32-00-20/201, Landing Gear Downlocks
B.
Access
(1)
Location Zones
133 Wing Center Section (Left)
134 Wing Center Section (Right)
C.
Procedure
S 214-002
(1) Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
S 494-003
WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 034-004
(3)
Remove the pressure switch of the APU DC fuel pump (10) (AMM 28-25-03/401).
S 034-005
(4)
Remove the electrical connector (4) from the motor impeller (3) of the APU DC fuel pump.
(5)
Disconnect the bonding jumper (11) from the retainer (2).
S 034-006
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