28-25-07
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747-400
MAINTENANCE MANUAL
SHROUD DRAIN VALVE (APU FUEL LINE)
SEE A
DRAIN VALVE
PACKING PRIMARY POPPET
PACKING VALVE SEAT
SHROUD DRAIN VALVE (APU FUEL LINE) A
Primary Poppet for the Shroud Drain Valve (APU Fuel Line)
Figure 401
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28-25-07
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747-400
MAINTENANCE MANUAL
C. References
(1)
AIPC 28-25-04, Fig. 5
D.
Access
(1)
Location Zone
149 Keel Beam (Part)
E.
Procedure
S 114-011
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(1)
Remove all remaining lubricant from the base and the seat with solvent, Series 82 (AMM 20-30-82/201).
S 434-006
(2)
With a new O-ring, assemble the poppet in the valve seat.
S 644-007
(3)
Apply a thin layer of antiseize compound to the external and the internal threads.
S 424-008
(4)
With a new O-ring on the valve seat, install the valve seat in the valve base, with the seat adapter.
(5)
Tighten the valve seat to 100-120 pound-inches.
S 424-010
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28-25-07
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747-400 MAINTENANCE MANUAL
APU FUEL LINE SHROUD DRAIN VALVE SECONDARY POPPET -
___________________________________________________ REMOVAL/INSTALLATION
____________________
1. General_______
A. This procedure has two tasks:
(1)
A task to remove the secondary poppet from the drain valve for the APU fuel line shroud.
(2)
A task to install the secondary poppet in the drain valve for the APU fuel line shroud.
B.
Access to the valve is through the right body gear wheel well. No access door or panel removal is necessary.
C.
The procedure for the removal or the installation of the primary poppet is in AMM 28-25-08/401.
TASK 28-25-08-004-001
2. APU Fuel Line Shroud Drain Valve Secondary Poppet Removal (Fig. 401)_________________________________________________________
A. References
(1)
AMM 32-00-30/201, Landing Gear Door Locks
(2)
AIPC 28-25-04, Fig. 5
B.
Access
(1)
Location Zone
138 Body Landing Gear Well, Right
C.
Procedure
S 864-002
(1) Make sure that the ground lockpins for the landing gear are installed.
S 494-003
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2) Do the "Installation of the Door Locks on the Wing Landing Gear" task (AMM 32-00-30/201).
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