(10) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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38-15-67
ú ú 01 Page 205 ú Oct 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
COMPRESSOR RELAY - REMOVAL/INSTALLATION
_______________________________________
1. General
_______
A. This procedure includes two tasks:
(1)
The removal of the air compressor relay for the potable water system.
(2)
The installation of the air compressor relay for the potable water system (relay).
B. The installation task of the relay includes an operational check of the installed relay.
C. The relay (No. 859) is in the center equipment panel, P54, in the electrical and electronics compartment.
TASK 38-15-68-004-015
2. Relay Removal
_____________
A. References
(1)
AMM O9-02/201, Body Section 42 Access Doors and Panels
(2)
AMM 24-22-00/201, Manual Control
B. Access
(1)
Location Zone 118 Electrical and Electronics Compartment, RH
(2)
Access Panel
125B Electronic Access Door
C. Procedure
S 864-016
WARNING: YOU MUST REMOVE ELECTRICAL POWER FROM THE AIRPLANE WHEN YOU DO
_______ WORK IN THE CENTER EQUIPMENT PANEL. THE HIGH VOLTAGES CAN CAUSE INJURY TO PERSONS.
(1)
Remove electrical power (AMM 24-22-00/201).
(2)
Open the electronics access door, 125B (AMM 06-09-02/201).
(3)
Open the access door for the center equipment panel.
(4)
Remove the mounting screws from the relay mounting bracket.
(5)
Remove the relay from the relay socket.
S 014-017
S 014-018
S 024-019
S 024-020
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
38-15-68
ALL ú ú 01 Page 401 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 38-15-68-404-021
3. Relay Installation
__________________
A. References
(1)
AMM 06-09-02/201, Body Section 42 Access Doors and Panels
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 36-00-00/201, Pneumatic
(4)
AMM 38-15-60/201, Water System Pressurization
B. Access
(1)
Location Zone 118 Electrical and Electronic Compartment, RH
(2)
Access Panel
125B Electronic Access Door
C. Procedure
S 864-022
WARNING: YOU MUST REMOVE ELECTRICAL POWER FROM THE AIRPLANE WHEN YOU DO
_______ WORK IN THE CENTER EQUIPMENT PANEL. THE HIGH VOLTAGES CAN CAUSE INJURY TO PERSONS.
(1)
Remove electrical power (AMM 24-22-00/201).
S 424-023
(2)
Install the relay.
S 424-024
(3)
Install the fasteners.
S 714-025
(4)
Do a check of the relay operation.
(a)
If the pneumatic manifold is pressurized, do this task: "Release the Pressure in the Pneumatic System" (AMM 36-00-00/201).
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