S 864-026
 S 424-027
 S 824-038
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A

747-400
MAINTENANCE MANUAL

FUEL JETTISON TRANSFER VALVE BODY SEE A
ADAPTER PLATE
MOUNTING BRACKET
ADAPTER SHAFT
PACKING (2 LOCATIONS) ACTUATOR
COUPLING (2 LOCATIONS) VALVE BODY
INBD WASHER (4 LOCATIONS)
BOLT (4 LOCATIONS) FWD
FUEL JETTISON TRANSFER VALVE BODY
A
Fuel Jettison Transfer Valve Body (Inboard Main Tanks) Figure 402
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A 747-400 MAINTENANCE MANUAL
 (4)  S 434-028Install the bolts and washers (4 locations) that attach the valve body to the mounting bracket.
 (5)  S 434-039Install lockwire on the bolts.
 (6)  S 434-029Put new packings in the couplings on the jettison transfer line.
 (7)  S 434-040Connect the couplings to the valve body.
 (8)  S 864-030Go out of and close the inboard main tank (AMM 28-11-00/201).
 (9)  S 714-043Do this task: Fuel Jettison Transfer Valves - Fuel Transfer Operational Test (AMM 28-31-00/501).

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A
747-400 MAINTENANCE MANUAL
 FUEL OVERRIDE/JETTISON PUMP HOUSING - REMOVAL/INSTALLATION
__________________________________________________________
 1.  General_______
 A.  This procedure contains instructions to remove and install the housing for an override/jettison pump.
 B.  The override/jettison pumps are found in the center wing tank and in the inboard main tanks, installed on the rear spar.
 C.  Access to the override/jettison pump housings is through the applicable fuel tank access doors and, in the center wing tank, the spanwise beam access doors.
 TASK 28-31-07-004-001
 2.  Override/Jettison Pump Housing Removal (Fig. 401)______________________________________
 A.  References
 (1)
AMM 07-11-08/201, Cargo and Fuel Laoding Support

 (2)
AMM 28-11-00/201, Fuel Tanks

 (3)
AMM 28-11-09/401, Spanwise Beam Access Door

 (4)
AMM 28-26-00/201, Defueling

 (5)
AMM 28-31-01/401, Override/Jettison Pump Motor/Impeller Unit

 (6)
AIPC 28-31-07, Fig. 1

 B.  
Access

 (1)  
Location Zones 131 Center Section Wing Box, Left 132 Center Section Wing Box, Right 544 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 644 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right

 (2)  
Access Panels
 131AZ Spanwise Beam Access Door
 131BZ Spanwise Beam Access Door
 131CZ Spanwise Beam Access Door
 131DZ Spanwise Beam Access Door
 132AZ Spanwise Beam Access Door
 132BZ Spanwise Beam Access Door

 C.  
Procedure

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747-400
MAINTENANCE MANUAL

 S 494-038
 WARNING: USE THE TAIL SUPPORT EQUIPMENT IF YOU CANNOT KEEP THE CENTER OF
_______ GRAVITY IN THE LIMITS GIVEN BY THE WEIGHT AND BALANCE MANUAL. IF THE AIRPLANE CENTER OF GRAVITY IS NOT IN THESE LIMITS, THE AFT END OF THE AIRPLANE CAN HIT THE GROUND. DAMAGE TO EQUIPMENT AND INJURY TO PERSONS CAN OCCUR.
　
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