(2)
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Lining
(3)
IPC 21-58-30, FIG. 30
(4)
SSM 21-58-03
(5)
WDM 21-58-13, 21-58-14
B. Access
(1) Location Zone 121 Forward Cargo Compartment Forward Half, LH
C. Prepare for the Removal
S 864-023
CAUTION: DO NOT OPERATE THE ELECTRICAL/ELECTRONIC EQUIPMENT WHEN YOU DO
_______ THIS PROCEDURE. IF YOU OPERATE THE ELECTRICAL EQUIPMENT WHEN THE EQUIPMENT COOLING SYSTEM IS OFF, YOU COULD CAUSE THE ELECTRICAL EQUIPMENT TO BECOME TOO HOT.
(1)
Remove the electrical power (AMM 24-22-00/201).
S 014-003
(2)
Get access the three-way valve:
(a) Remove the the left sidewall lining in the forward cargo compartment at STA 590 (AMM 25-52-01/401).
D. Remove the Valve
S 034-004
(1)
Remove the electrical connector, DV555, from the valve.
S 034-005
(2)
Remove the nut and the washer that attaches the jumper to the three-way valve.
(3)
Remove the bonding jumper from the valve.
(4)
Remove the three clamps from the three-way valve.
S 034-006
S 034-007
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21-58-14
ALL ú ú 02F Page 401 ú Oct 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
FORWARD CARGO COMPARTMENT
SEE A
EQUIPMENT COOLING
THREE-WAY VALVE
SEE B
FWD
A
BONDING
JUMPER VALVE OUTLET PORT B
ACTUATOR (TO FLIGHT
ELECTRICAL COMPARTMENT
CONNECTOR EQUIPMMENT)
FWD INLET PORT A (FROM AIR CONDITIONING PACKS)
EQUIPMENT COOLING THREE-WAY VALVE
CLAMP (3 LOCATIONS)
INLET PORT C (FROM EQUIPMENT COOLING FANS)
B
Equipment Cooling Three-Way Valve Installation Figure 401
C23299
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21-58-14
ALL ú ú 02F Page 402 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 024-008
(5)
Remove the three-way valve.
S 434-009
(6)
Put a cover on the duct openings.
TASK 21-58-14-404-010
3. Equipment Cooling Three-Way Valve Installation (Fig. 401)______________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Lining
(3)
SSM 21-58-03
(4)
WDM 21-58-13, 21-58-14
B. Access
(1) Location Zone 121 Forward Cargo Compartment Forward Half, LH
C. Install the Three-Way Valve
S 034-011
(1) Remove the covers from the duct openings.
(a) Make sure there is no unwanted material in the ducts.
S 984-012
(2) Put the valve in its position between the ducts.
(a) Make sure the valve actuator is oriiented inboard.
S 434-013
(3) Install the three clamps.
(a) Tighten the clamps to 40 inch-pounds.
S 434-014
(4) Install the bonding jumper.
(a) Make sure that the bonding resistance between the valve and the airplane structure is not greater than 0.005 Ohms.
S 434-015
(5) Install the electrical connector, DV555, on the valve.
D. Do the Installation Test of the Three-Way Valve
S 864-016
(1) Supply electrical power (AMM 24-22-00/201).
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本文鏈接地址：747-400 AMM 飛機維護手冊 空調 AIR CONDITIONING 2(110)
