S 864-011
(4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P6 Main Power Distritbution 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
S 714-012
(5) Push the TEST 1 switch on the Squib Test Module.
(a) Make sure the ENG 1, 2, 3, 4, CARGO A, B, C, D, and the APU lights (green) come on.
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747-400 MAINTENANCE MANUAL
S 714-013
(6) Push the TEST 2 switch on the Squib Test Module.
(a) Make sure the ENG 1, 2, 3, 4, CARGO A, B, C, D, and the APU lights (green) come on.
NOTE: You can also do a test of the lights one at a time if
____ you push each light directly and make sure the light comes on.
S 864-014
(7) Remove electrical power if it is not necessary (Ref 24-22-00/201).
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747-400 MAINTENANCE MANUAL
ENGINE FIRE EXTINGUISHER BOTTLE - REMOVAL/INSTALLATION
______________________________________________________
1. General (Fig. 401)_______
A. This procedure contains two tasks. The first task removes the fire extinguisher bottle. The second task installs the fire extinguisher bottle.
B. Two fire extinguisher bottles are in the leading edge of each wing. The left wing fire extinguisher bottles are M228, M229; and the right wing bottles are M230, and M231. Removal/installation consists of extending leading edge flaps, installing locks, and disconnecting associated plumbing and wiring. Removal/installation procedure is the same for all four bottles.
TASK 26-21-03-004-001
2. Remove Engine Fire Extinguisher Bottle (Fig. 401)______________________________________
A. 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 BOTTLES 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).
B. Special Tools and Equipment
(1)
Squib Protective Cover
M83723/60-112-AN or AC
(2)
17MIT65B04017 - Lock - Drive Unit, Leading Edge Flap
C. References
(1)
AMM 20-41-02/201, Electrostatic Discharge Sensitive Devices
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 26-21-00/001, Engine Fire Extinguishing System
(4)
AMM 26-21-04/401, Engine Fire Extinguisher Bottle Discharge Cartridge (quib)
(5)
AMM 27-81-00/201, Leading Edge Flap System
(6)
AIPC 26-21-03 Fig. 1
(7)
WDM 26-21-01 thru WDM 26-21-04
D. Access
(1) Location Zones
514 Krueger Flap No.1, Left
614 Krueger Flap No.1, Right
E. Procedure
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747-400
MAINTENANCE MANUAL
BOTTLES EXTINGUISHER ENGINE FIRE
SEE A
14. M228 THRU M231 EXTINGUISHER BOTTLE,
13. BOLT
12. WASHER 1. CONNECTOR ELECTRICAL
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