F.
Remove the Voice Recorder Remote Mic.

 S 024-075
 (1)  
Remove the four mounting screws.

 S 024-076

 (2)  
Remove the mic from the module.

 TASK 26-21-01-404-006
 3. Install the Fire Control Module and the Fire Switch
___________________________________________________
 A. References
 (1)  
AMM 26-21-01/501, Fire Control Module

 (2)  
AIPC 26-21-05 Fig. 5

 (3)  
WDM 26-21-01 thru WDM 26-21-04

 B.
Access

 (1)  
Location Zone
 221 Control Cabin L.H.
 222 Control Cabin R.H.

 C.
Install the Voice Recorder Remote Mic.

 S 424-077
 (1)  
Install the mic in the module.

 S 434-078

 (2)  
Tighten the four screws to secure the mic to the module.

 D.
Install the Fire Switch

 S 434-065
 (1)  
Hold the fire switch and install the four fasteners to the module baseplate.

 (2)  
Tighten the four screws and install the switch.

 S 424-066
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 E. Install the Fire Control Module
 S 434-072
 (1) Support the module and connect these electrical connectors:
 -DS211 - Engine 1 Switch
 -DS212 - Engine 2 Switch
 -DS213 - Engine 3 Switch
 -DS214 - Engine 4 Switch
 -DS246 - APU Switch
 -DB7102 - RMT MIC Voice Recorder
 -DM7326A - Lower Cargo FWD Arming Switch
 -DM7326B - Lower Cargo AFT Arming Switch
 -DM7326C - Cargo Fire Extinguishing Switch
 S 424-008
 (2)  Attach the module in the correct location with the attached quarter-turn-fasteners (6 places).
 F. Put the Airplane Back to Its Usual Condition
 S 864-009
 (1)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the main power distribution panel, P6:

 (a)  
6H1, FIRE EXTINGUISHER ENG 1&3 B

 (b)  
6H2, FIRE EXTINGUISHER ENG 1&3 A

 (c)  
6H3, FIRE EXTINGUISHER ENG 2&4 B

 (d)  
6H4, FIRE EXTINGUISHER ENG 2&4 A

 (e)  
6H5, FIRE EXTINGUISHER APU

 (f)  
6H6, FIRE EXTINGUISHER LOWER CARGO

 (g)  
6C6, FIRE SW UNLOCK

 (h)  
6L27, VOICE RECORDER

 (2)
Do the installation test procedure for the fire control module.

 S 714-071
 TASK 26-21-01-734-305
 4. Installation Test
_________________
 NOTE: This test should be performed when the fire control module is
____ replaced. It is not intended as a replacement for the system tests.
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 ALL  ú ú 16 Page 405 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 A.

B.
C.
D.
E.
A
747-400 MAINTENANCE MANUAL
General
 WARNING:  DO NOT TOUCH THE SQUIB BEFORE YOU DO THE PROCEDURES FOR DEVICES
_______ THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)
Obey this warning during all of this task.Special Tools and Equipment

 (1)
Squib Protective Covers

 -M83723/60-108-AN or AC
 -M83723/60-110-AN or AC
 -M83723/60-112-AN or AC
 -M83723/60-208-AN or AC
 -M83723/60-210-AN or AC

 (2)
G26001-105 - Squib Test Box

 NOTE: Adapter cables are included with the squib circuit test box.
____ Refer to drawing G26001 for the applicable adapters and connectors.
Equipment
 (1)
　
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