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A
747-400 MAINTENANCE MANUAL
 ENGINE FIRE EXTINGUISHER BOTTLE - INSPECTION/CHECK
__________________________________________________
 TASK 26-21-03-206-001
 1.  The Check of the Engine Fire Bottle (Fig. 601)___________________________________
 A. General
 (1)  
This task gives a visual inspection/check of the engine fire extinguisher bottles M228, M229, M230, and M231.

 (2)  
The engine fire extinguisher bottle inspection/check is a visual inspection of the fire extinguisher bottles, mounting lugs, wires and related plumbing.

 (3)  
To make an inspection/check of the fire extinguisher bottle, you must do these steps:

 (a)  
Remove the fire extinguisher bottle.

 (b)  
Weigh the fire extinguisher bottle.

 (c)  
Install the fire extinguisher bottle.

 (4)  
The inspection/check procedure is the same for all four fire extinguisher bottles.

 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.
 (5)  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)  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 26-21-03/401, Engine Fire Extinguisher Bottle

 (4)  
AMM 27-81-00/201, Leading Edge Flap System

 (5)  
AIPC 26-21-03 Fig. 1

 (6)  
WDM 20-10-13

 (7)  
WDM 26-21-01 thru WDM 26-21-04

 D. Access
 (1)  Location Zone
 514 Kruger Flap No.1, Left
 614 Kruger Flap No.1, Right

 E. Procedure
 S 866-002
 (1)  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 EXTINGUISEHR ENG 1&3 A
 3) 6H3 FIRE EXTINGUISHER ENG 2&4 B
 4) 6H4 FIRE EXTINGUISHER ENG 2&4 A

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747-400 MAINTENANCE MANUAL
SEE A
EXTINGUISHER BOTTLE, M228 THRU M231 
MOUNTING LUG 
PRESSURE SWITCH ELECTRICAL CONNECTOR 
PORT DISCHARGE 
ELECTRICAL CONNECTOR  DISCHARGE CARTRIDGE (SQUIB) 
A ENGINE FIRE EXTINGUISHER BOTTLE 
Figure 601 Engine Fire Extinguisher Bottle Check 

L81896
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747-400 MAINTENANCE MANUAL
 5) 6H7 FIRE SW UNLOCK
 S 016-026
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  Do this task: "Leading Edge Flap Extension" (Ref 27-81-00/201).
 S 496-005
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
　
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