(3)
Go into the fuel tank.
S 034-004
(4)
Remove the nuts and the washers that attach the airplane wires and the sensor wires to the terminal block (3 locations).
(a)
Write down the color of the wires for the installation task.
S 864-015
S 034-005
(5) Remove the screws and the washers (5 locations) that attach the cover bracket to the mounting bracket.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
ASEE SENSOR SINGLE POINT
GREEN WIRE (HI-Z SHIELD) YELLOW WIRE (LO-Z)
WHITE WIRE (HI-Z) TERMINAL BLOCK
THE RESERVE TANK TRANSFER SYSTEM SINGLE POINT SENSOR ASSEMBLY FOR
SENSOR SINGLE POINT
(2 LOCATIONS) WASHER
MOUNTING BRACKET COVER BRACKET
(2 LOCATIONS) SCREW
FOR THE FUEL SENSOR ASSEMBLY SINGLE POINT JETTISON SYSTEM (REF ONLY) FWD (5 LOCATIONS) (5 LOCATIONS) SCREW WASHER
RIGHT WING OPPOSITE) (LEFT WING SHOWN, SINGLE POINT SENSOR A
Figure 401 Reserve Tank Transfer Single Point Sensor
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A
747-400 MAINTENANCE MANUAL
S 034-006
(6)
Remove the screws and the washers (2 locations) that attach the sensor to the mounting bracket.
S 024-007
(7)
Remove the sensor wires through the hole in the mounting bracket.
S 024-016
(8)
Remove the sensor from the airplane.
TASK 28-16-07-404-008
3. Reserve Tank Transfer Single Point Sensor Installation (Fig. 401)______________________________________________________
A. References
(1)
AMM 28-11-00/201, Fuel Tanks
(2)
AMM 28-16-08/501, Reserve Tank Transfer Single Point Sensor Control Card
(3)
AIPC 28-41-10 Fig. 1
(4)
AIPC 28-41-11 Fig. 2
(5)
SSM 28-44-01
(6)
WDM 28-44-11, 28-44-12
B.
Access
(1)
Location Zones 544 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 644 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right
C.
Procedure
S 424-009
(1)
Put the sensor wires up through the hole in the top of the mounting bracket.
S 424-017
(2)
Put the SPS into its correct position.
S 434-010
(3)
Install the screws and the washers (2 locations) that attach the sensor to the mounting bracket.
(a)
Tighten the screws.
S 434-011
(4)
Install the screws and the washers (5 locations) that attach the cover bracket to the mounting bracket.
(a)
Tighten the screws.
S 434-012
(5)
Connect the airplane wires and the sensor wires to the studs on the terminal block with the washers and the nuts.
(a)
Connect the white wire to the HI-Z stud.
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A 747-400 MAINTENANCE MANUAL
(b) (c) Connect the green wire to the HI-Z SHIELD stud.Connect the yellow wire to the LO-Z stud.
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