1
PREPARE THE FAYING SURFACE OF THE BONDING JUMPER AND BONDING
JUMPER TAB FOR AN ELECTRICAL SURFACE BOND (SWPM 20-20-00).
2
Fuel Crossfeed Valve Actuator
Figure 401
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A
747-400 MAINTENANCE MANUAL
TASK 28-22-02-404-010
3. Fuel Crossfeed Valve Actuator Installation (Fig. 401)
__________________________________________
A. Equipment
(1)
Bonding Meter (SWPM 20-20-00) Approved for use in fuel vapor areas
B.
Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Actuator | 28-22-02 | 01 | 30 | 2......…........…...................................…..........….....….........1
C. References
(1)
AIPC 28-22-02, Fig. 1
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 27-81-00/201, Leading Edge Flap System
(4)
SWPM 20-20-00, Electrical Bond and Ground
(5)
SSM 28-22-02
(6)
WDM 28-22-21, WDM 28-22-22, WDM 28-22-23, WDM 28-22-24
D.
Access
(1)
Location Zones
521 Leading Edge to Front Spar, Left
621 Leading Edge to Front Spar, Right
E.
Procedure
S 114-032
(1)
Prepare these surfaces for an electrical surface bond (SWPM 20-20-00):
(a)
Faying surface of the index plate and valve actuator.
(b)
Faying surface of the bonding jumper and bonding jumper tab.
S 824-033
(2)
Do these steps to align the actuator:
(a)
Make sure the manual override lever on the actuator is in the fully closed position.
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747-400 MAINTENANCE MANUAL
(b)
Align the actuator output shaft with the adapter shaft.
(c)
Make sure the two spaces for teeth on the adapter shaft align with the actuator output shaft.
(d)
Put the actuator output shaft into the adapter shaft.
S 434-034
(3)
Do these steps to install the actuator (1):
(a)
Install the socket-head screws (3) and washers (4) to attach the actuator to the index plate.
(b)
Install lockwire on the screws.
CAUTION: MAKE SURE THERE IS CLEARANCE BETWEEN THE VALVE ACTUATOR
_______ MANUAL OVERRIDE LEVER AND THE SPAR ADAPTER PLATE AND INDEX PLATE LOCKWIRE. INTERFERENCE WITH THE MANUAL OVERRIDE LEVER CAN PREVENT VALVE OPERATION OR CAUSE ACTUATOR MOTOR DAMAGE.
(c) Make sure there is clearance between the manual override lever and the adapter plate.
S 434-015
(4)
Attach the bonding jumper (7) to the actuator (1) with the screw (8), washers (6), and nut (5) (SWPM 20-20-00).
S 764-030
(5)
Measure the electrical resistance between the actuator (1) and the spar (SWPM 20-20-00).
NOTE: The resistance must not be more than 0.008 ohm.
____
S 434-016
(6) Connect the electrical connector (2) to the actuator (1).
NOTE: Refer to the table that follows for the equipment numbers:
____
~................................................................. | | Equipment Number | | Location ............................ | | Valve | Connector | ................................................................... | No. 1 Fuel Crossfeed Valve | V45 | DV45 | | No. 2 Fuel Crossfeed Valve | V46 | DV46 | | No. 3 Fuel Crossfeed Valve | V47 | DV47 | | No. 4 Fuel Crossfeed Valve | V48 | DV48 | 2......................................…...........…..............1
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