S 864-008
(8)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel 1) 6H20 L ISO VLV AIR SUPPLY PWR 2) 6H24 R ISO VLV AIR SUPPLY PWR
S 034-009
(9)
Disconnect the electrical connector from the applicable isolation valve:
(a)
DV108 VALVE-WING ISOLATION L
(b)
DV109 VALVE-WING ISOLATION R
S 014-010
(10)
If you must remove the left wing isolation valve, remove the pack No. 1 water separator to get access to the valve (AMM 21-51-05/201).
S 034-011
(11)
Disconnect the bonding jumper from the valve.
S 034-036
(12)
Remove the couplings from each side of the valve.
(13)
Remove the isolation valve.
(14)
Remove the seals from the duct flanges.
(15)
Examine the seals for damage.
S 024-037
S 034-013
S 214-038
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36-11-07
ALL ú ú 01 Page 403 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 034-039
(16)
Replace all the seals that have damage.
S 034-014
(17)
Put covers on the open ducts to keep out the unwanted objects.
TASK 36-11-07-404-015
3. Wing Isolation Valve Installation (Fig. 401)
_________________________________
A. Consumable Materials
(1) G00095 Detector - Leak, Leak-Tek (160X)
B. References
(1)
AMM 06-09-03/201, Body Section 44 Access Doors and Panels
(2)
AMM 20-22-01/601, Electrical Bonding
(3)
AMM 21-51-05/201, Water Separator
(4)
AMM 24-22-00/201, Manual Control
(5)
AMM 36-00-00/201, Pneumatic System
C. Access
(1)
Location Zone 191 Fairing, Wing To Body, Forward Lower Half, LH 192 Fairing, Wing To Body, Forward Lower Half, RH
(2)
Access Panel
191NL Air-Conditioning Access Door
192NR Air-Conditioning Access Door
D. Procedure
S 434-016
(1)
Remove the duct covers.
S 434-017
(2)
Install the seals in the duct flanges.
S 424-018
(3)
Put the isolation valve in its position between the duct flanges.
NOTE: Make sure that the flow arrow points aft for the left
____ wing isolation valve, and inboard for the right wing isolation valve.
S 434-019
(4)
Install the couplings on each side of the valve.
(5)
Tighten the couplings to 65-85 pound-inches (7-10 N.m).
(6)
Connect the bonding jumper to the valve (AMM 20-22-01/601).
S 434-020
S 434-021
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36-11-07
ALL ú ú 01 Page 404 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 764-022
(7)
Make sure that the resistance between the ground stud on the valve and the aircraft frame (through the bonding jumper) is less than 0.0025 ohms.
S 434-023
(8)
Connect the electrical connector to the valve:
(a)
DV108 VALVE-WING ISOLATION L
(b)
DV109 VALVE-WING ISOLATION R
S 214-034
(9)
Do a visual check of the applicable wing isolation valve and electrical connections for the correct installation and condition.
S 864-024
(10)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6 Main Power Distribution Panel
1) 6H20 L ISO VLV AIR SUPPLY PWR
2) 6H24 R ISO VLV AIR SUPPLY PWR
S 864-025
(11) Put the applicable wing ISLN switch (P5 Pilots' Overhead Panel) in the closed position.
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