B.
References
(1)
AMM 20-41-02/201, Electrostatic Discharge Sensitive Devices
(2)
WDM 26-23-11
(3)
WDM 26-23-12
(4)
AIPC 26-23-01, Fig. 02
C.
Access
(1)
Location Zone 124 Forward Cargo Container Compartment Aft Half
D.
Procedure
S 864-113
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) Before you touch the squib, do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-02/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
1. ELECTRICAL
CONNECTOR
2. TEMPERATURE
COMPENSATED
PRESSURE
SWITCH
SEE A
13. EXTINGUISHER BOTTLE
12. BOLT
(3 LOCATIONS)
11. WASHER
(3 LOCATIONS)
MOUNTING LUG
10. GLAND NUT
4. DISCHARGE
PORT
7. O-RING
5. GROUND
STRAP
6. GROUND LUG
ELECTRICAL9. ASSEMBLY
CONNECTOR
8. DISCHARGE 3. ELECTRICAL
CARTRIDGE WIRE
(SQUIB)
FIRE EXTINGUISHER BOTTLE
A
Lower Cargo Compartment Fire Extinguisher Bottle Installation
Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-002
(2) Open this circuit breaker on the main power distribution panel, P6, and attach a DO-NOT-CLOSE tag:
(a) 6H6, FIRE EXTINGUISHER LOWER CARGO
S 034-003
(3) Disconnect the electrical connectors (12) from the applicable bottle squibs and the pressure switch (4) as shown in the table that follows:
~............................................................ | BOTTLE | ELECTRICAL CONNECTOR | .............................................................. | BOTTLE A PRESSURE SWITCH | DM7906A | .............................................................. | BOTTLE A FWD SQUIB | DM7906B | .............................................................. | BOTTLE A AFT SQUIB | DM7906C | .............................................................. | BOTTLE B PRESSURE SWITCH | DM7907A | .............................................................. | BOTTLE B FWD SQUIB | DM7907B | .............................................................. | BOTTLE B AFT SQUIB | DM7907C | .............................................................. | BOTTLE C PRESSURE SWITCH | DM7908A | .............................................................. | BOTTLE C FWD SQUIB | DM7908B | .............................................................. | BOTTLE C AFT SQUIB | DM7908C | .............................................................. | BOTTLE D PRESSURE SWITCH | DM6742A | .............................................................. | BOTTLE D FWD SQUIB | DM6742B | .............................................................. | BOTTLE D AFT SQUIB | DM6742C | 2.................................…..........................1
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