S 865-145
(4) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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A
747-400 MAINTENANCE MANUAL
SQUIB TEST MODULE - REMOVAL/INSTALLATION
________________________________________
1. General_______
A. This procedure contains two tasks. The first task removes the Squib Test Module, M7327. The second task installs the Squib Test Module and makes sure it operates correctly.
B. The Squib Test Module is installed on the overhead maintenance panel, P461.
TASK 26-21-02-004-001
2. Remove the Squib Test Module (Fig. 401)____________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
IPC 26-21-02 Fig. 1
(3)
WDM 26-21-01 thru 26-21-04
B. Access
(1) Location Zone
220 Control Cabin
C. Procedure
S 864-002
(1)
Supply electrical power (Ref 24-22-00/201).
S 864-003
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel 1) 6H1, FIRE EXTINGUISHER ENG 1&3 B 2) 6H2, FIRE EXTINGUISHER ENG 1&3 A 3) 6H3, FIRE EXTINGUISHER ENG 2&4 B 4) 6H4, FIRE EXTINGUISHER ENG 2&4 A 5) 6H5, FIRE EXTINGUISHER APU 6) 6H6, FIRE EXTINGUISHER LOWER CARGO
(3)
Remove the screws that hold the module (4 locations).
S 034-005
(4)
Pull the module out until you can get access to the electrical connectors, DM7327 (3) at the rear.
S 034-004
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ALL ú ú 01 Page 401 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
FLIGHT COMPARTMENT
A
Squib Test Module Installation
Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 034-015
(5)
Hold the module and disconnect the electrical connectors.
S 024-006
(6)
Remove the module from the panel.
TASK 26-21-02-404-007
3. Install the Squib Test Module (Fig. 401)_____________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
IPC 26-21-02 Fig. 1
(3)
WDM 26-21-01 thru 26-21-04
B. Access
(1) Location Zone
220 Control Cabin
C. Procedure
S 434-008
(1)
Hold the module and connect the electrical connectors, DM7327A, DM7327B, and DM7327C at the rear.
S 424-009
(2)
Carefully push the module into its correct position.
S 434-010
(3)
Attach the module to the panel with the screws (4 locations).
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