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CHAPTER 26
FIRE PROTECTION
TABLE OF CONTENTS
Subject Subject No.
FIRE PROTECTION.......................................................................................................

Description and Operation
Fire Protection System Module
Lightshield Module
Remote APU Fire Control Panel

DETECTION................................................................................................................... 26-10-0

Description and Operation
Compartment Overheat Accessory Unit
Bleed Air Duct Overheat Test and Indication Section
Engine and APU Fire Detection Accessory Unit

ENGINE AND FIRE DETECTION ACCESSORY UNIT ............................................. 26-10-01 Removal/Installation
ENGINE FIRE DETECTION SYSTEM ....................................................................... *[5] 26-11-0

Description and Operation *[4] 26-11-02 Alarm Bell Engine and APU Fire Detection Accessory Unit Components Aural Warning and Master Fire Warning Lights Control Section
Detector Control Cards
Detector Inoperative Lights
Detector Test Switch

Fire Protection System Module Components
Bell Cutout Switch
Master Caution Lights Control Section
Overheat Detector Switch
Test Switch
Warning Lights

Master Fire Warning and Master Caution Lights
Sensing Elements
Trouble Shooting
Adjustment/Test

Engine Fire Detection Sensing Element.................................................................. 26-11-11 Removal/Installation
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May 01/99  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Contents 26 Page 1 

Subject Subject No.
APU FIRE DETECTION SYSTEM.............................................................................. *[2] 26-15-0

Description and Operation *[3] 26-15-02 Alarm Bell Engine and APU Fire Detection Accessory Unit Components
APU Detector Inoperative Light
Aural Warning and Master Fire Warning Lights Control Section
Detector Control Cards
Detector Test Switch

Fire Protection System Module Components
Bell Cutout Switch
Test Switch
Warning Light

Master Fire Warning Lights
Remote APU Fire Control Panel Components
APU Horn Cutout Switch
Fire Warning Lights

Remote Horn
Sensing Elements
Trouble Shooting
Adjustment/Test

APU Fire Detection Sensing Element...................................................................... 26-15-12 Removal/Installation
MAIN CABIN SMOKE DETECTION SYSTEM ........................................................... *[1] 26-16-0 Description and Operation
Aural and Visual Warning Components
Alarm Bell
Bell Cutout Switch
Control Amplifier
Smoke Detectors
Warning Lights

Smoke Detector Tubing
Test Switch
Trouble Shooting
Adjustment/Test
Tubing Cleaning/Painting

Smoke Detector ....................................................................................................... *[1] 26-16-11 Removal/Installation Cleaning
Control Amplifier ...................................................................................................... *[1] 26-16-21 Removal/Installation

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Contents 26 Page 2  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 01/99 

Subject Subject No.
WHEEL WELL OVERHEAT DETECTION SYSTEM ..................................................... 26-17-0

Description and Operation
Alarm Bell
Compartment Overheat Accessory Unit Components

Alarm Cutout Control Card
Overheat Control Unit
Test Relay

Fire Protection System Module Components
Bell Cutout Switch
Test Switch
Wheel Well Warning Light

Master Fire Warning Lights
Sensing Element
Trouble shooting
Adjustment/Test

Wheel Well Detection Sensing Element ..................................................................... 26-17-11 Removal/Installation Adjustment/Test Inspection/Check
WING AND LOWER AFT BODY OVERHEAT DETECTION SYSTEM ......................... 26-18-0 Description and Operation
Bleed Air Duct Overheat Test and Indication Section Components
Master Caution Lights Control Section
Overheat Warning Lights
Test Switch

Compartment Overheat Accessory Unit Components
Left Overheat Test Light
Overheat Control Unit
Overheat Test Relay
Test Switches

Master Caution and Annunciator Lights
Sensing Element
　
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