Proteccion contra fuego b 767

B767 

 Fire Protection
DO NOT USE FOR FLIGHT

Boeing B767 - Systems Summary [Fire Protection]

Introduction
There are fire detection and extinguishing systems for the: • engines • APU • forward and aft cargo compartments • lavatories The main gear wheel wells have a fire detection system, but no fire extinguishing system. The system will not detect hot brakes alone, without anassociated fire. Overheat detection systems are installed for both engines, struts, and pneumatic ducts in the wing and body areas. Refer to Chapter 2, Air Systems, for a description of equipment smoke evacuation, equipment overheat detection and bleed air duct leak.

Engine Fire Protection
Engine fire protection consists of these systems: • engine fire and overheat detection • engine fire warning •engine overheat caution • engine fire extinguishing

Engine Fire and Overheat Detection
There are detector loops in each engine nacelle to provide both fire and overheat detection. The SYS FAIL light illuminates and the EICAS advisory message FIRE/OVHT SYS displays to indicate failure of the fire/overheat detection system. The SYS FAIL light and advisory message can be reset to allow monitoring ofthe remaining systems.

Engine Fire Warning
The indications of an engine fire warning are: • the fire bell sounds • the master WARNING lights illuminate • the engine fire switch LEFT or RIGHT fire warning light illuminates • the discrete FIRE warning light illuminates • the engine FUEL CONTROL switch fire warning light illuminates • the EICAS warning message L or R ENGINE FIRE displays • theengine fire switch unlocks

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Boeing B767 - Systems Summary [Fire Protection]

The fire warning lights remain illuminated as long as the fire signal exists. The fire bell may be silenced by any of the following actions: • extinguishing the fire • pushing either master warning/caution reset switch • pulling the appropriate fire switch

Engine Overheat Caution
The indications of anengine overheat caution are: • the caution beeper sounds • the master CAUTION lights illuminate • the L or R ENG OVHT light illuminates • the EICAS caution message L or R ENG OVHT displays The overheat lights remain illuminated as long as the overheat condition exists.

Engine Fire Extinguishing
There are two engine fire extinguisher bottles. Either or both bottles can be discharged into eitherengine. When an engine fire switch is pulled out, the associated engine: • fuel is shut off • bleed valves are closed • generator is tripped off • hydraulic fluid is shut off to the engine-driven hydraulic pump • fire extinguishing bottles are armed Rotating the fire switch in either direction discharges a single extinguisher bottle into the associated engine. Rotating the engine fire switch in theother direction discharges the second extinguisher bottle into the same engine. If an extinguisher bottle is discharged or has low pressure: • the ENG BTL 1 or 2 DISCH light illuminates • the EICAS advisory message ENG BTL 1 or 2 displays

Engine/APU Fire and Override Switches
The engine and APU fire switches are mechanically locked in the down position to avoid inadvertent activation. When afire is detected, the respective switch is electrically unlocked and may then be pulled out. Manual unlocking of the switch is accomplished by pushing the fire override switch located beneath the fire switch.

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Boeing B767 - Systems Summary [Fire Protection]

APU Fire Protection
APU fire protection consists of these systems: • APU fire detection • APU fire warning • APU fireextinguishing

APU Fire Detection
There are fire detector loops in the APU compartment. There is no APU overheat detection. The SYS FAIL light illuminates and the EICAS advisory message FIRE/OVHT SYS displays to indicate failure of the APU fire detection system. The SYS FAIL light and advisory message can be reset to allow monitoring of the remaining systems.

APU Fire Warning
The indications of...