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SEE B
P61 PANEL AFT CARGO DOOR, 822
P6 PANEL ENGINE FIRE EXTINGUISHING BOTTLES
SEE C PANEL, M10443 ENGINE FIRE CONTROL
P8 PANEL SEE A MAIN WHEEL
FLIGHT COMPARTMENT
WELL BULKHEAD
ENG BTL 2 ENG BTL 1 DISCH LIGHT, LEFT ENGINE FIRE
DISCH LIGHT, YQNL4 SWITCH, S37 RIGHT ENGINE FIREYQNL2 SWITCH, S38
L ENG 2  R ENG 2 
LIGHT, YQML2  LIGHT, YQML4 
L ENG  ENG BTL  ENG BTL  R ENG  L ENG 1  R ENG 1 
OVHT  a  1 DISCH a 2 DISCH a  OVHT  a  LIGHT, YQML1  LIGHT, YQML3 
SQUIB TEST 
L  ENG  R 
DISCH  DISCH  1  2  1  2  APU 
1  2  1  2 
L E F T  r  R G I H T r  AFT G G 1 FWD 2 G G G G 1 CARGO  2 G G  TEST G 

ENGINE FIRE CONTROL PANEL, M10443 TEST SWITCH, S1 A SQUIB TEST CONTROL PANEL, M10401 PRESSURE SWITCH
B
SAFETY RELIEF AND FILLER PORT
DISCHARGE CARTRIDGE (SQUIB) ELECTRICAL CONNECTOR ENGINE FIRE EXTINGUISHER BOTTLE, B17 OR B18 C
Engine Fire Extinguishing System - Component Location Figure 102
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A

757 MAINTENANCE MANUAL
 ENGINE FIRE EXTINGUISHING SYSTEM - ADJUSTMENT TEST
__________________________________________________
 1.  General_______
 A. This section contains procedures to perform the tests that follow:
 (1)  
The operational test makes sure the system operates correctly. It can be done in a minimum of time and uses only the equipment installed in the airplane.

 (2)  
The system test has different tests for each part of the system. When all the tests are done, the engine fire extinguishing system is ready to operate correctly.

 (3)  
The discharge line test makes sure the connections are correct from the fire extinguisher bottles to the discharge nozzles.

 TASK 26-21-00-715-199
 2.  Operational Test________________
 A. General
 (1)  The engine fire extinguishing system has two identical fire bottles located in the forward of the aft cargo compartment, an engine fire control panel, and a squib test panel. The extinguishing plumbing is connected to the left and right engine, which lets each engine receive extinguishing agent from either bottle. Each engine has an independently operated fire extinguishing system.
 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.
 (2)  Before you touch the squib, do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-01/201).
 B. References
 (1)  
AMM 20-41-01/201, Electrostatic Discharge Sensitive Devices

 (2)  
AMM 24-22-00/201, Electrical Power Control

 C. Access
 (1)  
Location Zones
 153 Aft Cargo Compartment (Left)
 154 Aft Cargo Compartment (Right)

 (2)  
Access Panels
 822 Aft Cargo Compartment Door

 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

ENGINE FIRE 
EXTINGUISHING  ENGINE FIRE 
BOTTLES  EXTINGUISHING  ENGINE FIRE 
SEE  A  AFT CARGO  BOTTLE NO. 1  BOTTLE NO. 2 EXTINGUISHING 
DOOR  SEE  B 
SEE  B 
TO RIGHT 
ENGINE 
HARD POINT 
CONNECTOR 
TO LEFT 
ENGINE 
HARD POINT 
CONNECTOR 

A 
RUPTURE 
PRESSURE SWITCH  DISK 
SAFETY RELIEF 
AND FILLER PORT 
GROUND TEST 
　
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