787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Fire Protection Chapter 8
System Description Section 20
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 8.20.1
8.20 Fire Protection-System Description
Fire Protect ion20 System De scriptionSystem Description
Introduction
There are fire detection and extinguishing systems for the:
•APU
• cargo compartments
• engines
• lavatories
The engines also have overheat detection systems.
The main gear wheel wells have a fire detection system, but no fire extinguishing
system.
[Option – Overhead flight crew rest]
The overhead flight crew rest compartment has a fire detection system, but no fire
extinguishing system.
[Option – Overhead flight attendant rest]
The overhead flight attendant rest compartment has a fire detection system, but no
fire extinguishing system.
For additional information, refer to:
• Equipment Cooling, Equipment Ventilation, Lavatory and Galley
Ventilation, Ch. 2, Sec. 20
• Engine Anti–Ice Leak Detection System
, Ch. 3, Sec. 20
Engine Fire Protection
Engine fire protection consists of these systems:
• engine fire and overheat detection
• engine fire extinguishing
Engine Fire and Overheat Detection
There are multiple dual-channel detector assemblies in each engine nacelle. Each
detector channel provides both fire and overheat detection. Normally, at least one
element on each channel must detect a fire or overheat condition to cause an
engine fire warning or overheat caution.
If a fault is detected in one channel, the remaining channel element automatically
switches to single channel operation. If the operating channel senses a fire or
overheat, the system provides the appropriate fire warning or overheat caution.
If both main engine detector elements on a single assembly are faulted, no fire or
overheat detection is provided. The EICAS advisory message DET FIRE ENG (L
or R) is displayed if the engine fire detection system fails.
February 15, 2010
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