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A
747-400
MAINTENANCE MANUAL
STA 480 STA 580
FORWARD
EXHAUST FAN
CARGO COMPARTMENT
GROUND EXHAUST VALVE
E1/E2
RACKS
EXHAUST VALVE CHECK VALVE
E6/E9
VALVE
SUPPLY
SEE A
VALVE
OVERRIDE BYPASS VALVE VALVE
CHECK VALVE/ SUPPLY FAN
FWD
DUCT
CLAMPS
SUPPORT
CLAMPS
MANUAL OVERRIDE/ POSITION INDICATOR ELECTRICAL CONNECTOR
A
Equipment Cooling E6/E9 Valve Installation
Figure 401
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747-400 MAINTENANCE MANUAL
S 034-006
(3)
Move the duct sleeve and the flexible duct away from the valve.
S 024-007
(4)
Remove the valve.
S 034-008
(5)
Put a cover on the duct openings.
TASK 21-58-13-404-009
3. E6/E9 Valve Installation (Fig. 401)________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
AMM 45-10-00/201, Central Maintenance Computer System
(3)
AIPC 21-58-13 Fig. 1
(4)
WDM 21-58-25
(5)
SSM 21-58-06
B. Access
(1) Location Zone 121 Forward Cargo Compartment Forward Half, LH
C. Install the Valve
S 434-010
(1) Remove the cover from the duct opening.
(a) Make sure there is no unwanted material in the duct.
S 424-011
(2)
Put the valve in its position with the flow arrow pointed in the aft direction.
(3)
Put the duct sleeve and the flexible duct on the ends of the valve.
(4)
Install the clamps (4 locations) on each end of the valve.
(5)
Connect the electrical connector, DV449, to the valve.
S 434-012
S 434-021
S 434-013
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747-400 MAINTENANCE MANUAL
D. Do the Installation Test for the Valve
S 864-014
(1)
Supply electrical power (Ref 24-22-00/201).
S 864-016
(2)
Supply power to the CMCS (AMM 45-10-00/201).
S 864-017
(3)
Make sure the EQUIP COOLING selector, on the overhead panel, P5, is in the NORM position.
S 714-018
(4)
Make sure the EICAS status message, E6/E9 VALVE, does not show.
S 714-022
(5)
Make sure the message, E/E COOLING E6/E9 VALVE FAIL, does not show on the CMC EXISTING FAULTS page.
S 794-019
(6)
Feel for leaks around the valve.
(a)
Small leaks are permitted.
(b)
You must repair a large leak.
E. Put the Airplane to Its Usual Condition
S 864-020
(1) Remove the electrical power, if it is not necessary
(Ref 24-22-00/201).
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747-400 MAINTENANCE MANUAL
EQUIPMENT COOLING THREE-WAY VALVE - REMOVAL/INSTALLATION
________________________________________________________
1. General________
A. The equipment cooling three-way valve is installed in the left sidewall of the forward cargo compartment at station 590.
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