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 an associated 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 of the 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 • the engine 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 an engine 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 either engine. 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 the other 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 a fire 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 fire extinguishing
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 an APU fire warning are: • the fire bell sounds • the master WARNING lights illuminate • the APU fire warning light illuminates • the discrete FIRE warning light illuminates • the EICAS warning message APU FIRE displays • the APU automatically shuts down • the APU fire switch unlocks In addition to the above APU fire warnings, if the airplane is on the ground the horn on the nose gear strut sounds and the fire warning light on the APU ground control panel illuminates. The fire warning lights remain illuminated as long as the fire signal exists. The fire bell (and horn if APU fire on the ground) may be silenced by any of the following actions: • extinguishing the fire • pushing either master warning/caution reset switch • pulling the APU fire switch • pushing the APU fire shutdown switch if on the ground
APU Fire Extinguishing Option - One APU Fire Extinguishing Bottle There is one APU fire extinguisher bottle. When the APU fire switch is pulled out, the APU: • fuel is shut off • bleed air valve is closed Page 3
Boeing B767 - Systems Summary [Fire Protection]
• generator is tripped off • fire extinguishing bottle is armed Rotating the switch in either direction discharges the extinguisher bottle into the APU compartment. When the bottle is discharged or has low pressure: • the APU BTL DISCH light illuminates • the EICAS advisory message APU BTL displays
Main Gear Wheel Well Fire Protection The main gear wheel well has fire detection and warning only. There is no fire extinguishing system. The nose gear wheel well does not have a fire detection system.
Main Gear Wheel Well Fire Detection The main wheel well fire detection system consists of a single fire detection loop.
Main Gear Wheel Well Fire Warning The indications for a main wheel well fire are: • the fire bell sounds • the master WARNING lights illuminate • the WHL WELL FIRE warning light illuminates • the discrete FIRE warning light illuminates • the EICAS warning message WHEEL WELL FIRE displays 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
Cargo Compartment Fire Protection Cargo compartment fire protection consists of these systems: • cargo compartment smoke detection • cargo compartment fire warning • cargo compartment fire extinguishing
Cargo Compartment Smoke Detection The forward and aft cargo compartments each have smoke detectors installed The SYS FAIL light illuminates and the EICAS advisory message FIRE/OVHT SYS displays to indicate failure of the cargo compartment smoke detection system. The SYS FAIL light can be reset to allow monitoring of the remaining systems. Page 4
Boeing B767 - Systems Summary [Fire Protection]
Cargo Compartment Fire Warning The indications of a cargo compartment fire are: • the fire bell sounds • the master WARNING lights illuminate • the FWD or AFT cargo fire warning light illuminates • the discrete FIRE warning light illuminates • the EICAS warning message FWD or AFT CARGO FIRE displays 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 and clearing the smoke • pushing either master warning/caution reset switch • pushing the illuminated cargo compartment ARMED switch
Cargo Compartment Fire Extinguishing Fire extinguisher bottles are installed for cargo compartment fire extinguishing. Pushing the FWD or AFT cargo compartment ARMED switch arms the extinguishers for that compartment. Pushing the cargo fire bottle discharge switch initiates discharge of the fire bottles. The first bottle discharges immediately into the selected compartment. The CARGO BTL 1 advisory message is displayed on EICAS within a few seconds after pressing the cargo fire bottle DISCH switch. The second fire bottle discharges at a later time or at a reduced flow rate into the selected compartment. The CARGO BTL 2 advisory messages is displayed on EICAS within a few seconds after the bottle starts to discharge. The DISCH light illuminates when either bottle discharges.
Lavatory Fire Protection Lavatory fire protection consists of these systems: • lavatory fire detection and annunciation • automatic fire extinguishing in the lavatory waste container cabinet
Lavatory Fire Detection and Annunciation Each lavatory has a single smoke detector. When smoke is detected, aural annunciations sound in the lavatory and in the cabin. Depending on configuration, cabin lavatory smoke detection annunciation will consist of a horn, a chime, a flashing lavatory call light or illumination of the master call light at the associated flight attendant station. There is no cockpit annunciation of smoke detected in a lavatory.
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Boeing B767 - Systems Summary [Fire Protection]
Lavatory Fire Extinguishing Each lavatory has a fire extinguisher located in the waste container cabinet, with: • automatic fire extinguisher operation • no cockpit annunciations of lavatory fire extinguisher operations
Fire and Overheat Detection System Fault Test Automatic testing of the engine fire and overheat detectors, APU fire detectors and cargo compartment smoke detectors occurs when electrical power is initially applied. The FIRE/OVHT test panel permits manual testing of the various fire and overheat sensors.
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Boeing B767 - Systems Summary [Fire Protection]
Fire Protection EICAS Messages The following EICAS messages can be displayed. Message
Level
Light
APU BTL
Advisory
APU BTL DISCH
APU FIRE
Warning
APU
CARGO BTL 1
Advisory
DISCH
Warning
AFT
Aural
APU fire extinguisher bottle pressure is low Fire Bell
FWD CARGO FIRE ENG BTL 1
FWD Advisory
ENG BTL 2
Fire Bell
ENG BTL 1 DISCH
Warning
R ENGINE FIRE L ENG OVHT
LEFT RIGHT
Caution
R ENG OVHT
L ENG OVHT
Smoke is detected in the affected cargo compartment Engine fire extinguisher bottle 1 or bottle 2 pressure is low
ENG BTL 2 DISCH L ENGINE FIRE
Fire is detected in the APU Cargo fire extinguisher bottle 1 or bottle 2 pressure is low
CARGO BTL 2 AFT CARGO FIRE
Condition
Fire Bell
Fire is detected in the engine
Beeper
An overheat is detected in the engine
R ENG OVHT FIRE/OVHT SYS
Advisory
FAIL P-RESET
WHEEL WELL FIRE
Warning
WHL WELL FIRE
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Fire or overheat detection is inoperative for loops as shown on the status page Fire Bell
Fire is detected in a main wheel well
Boeing B767 - Systems Summary [Fire Protection]
Engine Fire Protection Engine Fire Panel 1
L ENG OVHT
ENG BTL 1 DISCH
R ENG OVHT
ENG BTL 2 DISCH
2 DISCH 1
3 4
DISCH 2
1
L E F T
R I G H T
2
5
AFT AISLE STAND 1
ENGINE & APU FIRE PANEL
Engine Overheat (L/R ENG OVHT) Lights
Illuminated (amber) – engine overheat is detected 2
Engine Bottle Discharged (ENG BTL DISCH) Lights
Illuminated (amber) – the extinguisher bottle is discharged or has low pressure 3
Engine Fire Switches
In – normal position, mechanically locked; unlocks automatically for fire warning Out – closes the associated engine and spar fuel valves, and • closes the associated engine bleed air valves • trips the associated engine generator off • shuts off hydraulic fluid to the associated engine–driven hydraulic pump • arms both engine fire extinguisher bottles Rotate to position 1 or 2 – discharges the selected fire extinguisher into the engine nacelle 4
Engine Fire Warning Lights
Illuminated (red) – an engine fire is detected 5
Engine and APU Fire Override Switches
Push – unlocks the respective engine or APU fire switch
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Boeing B767 - Systems Summary [Fire Protection]
Fuel Control Switches FUEL CONTROL
L
R
RUN
1
CUT OFF
CONTROL STAND 1
FUEL CONTROL Switch Fire Warning Lights
Illuminated (red) – an associated engine fire is detected
Fire Warning Light FIRE
1
CENTER FORWARD PANEL 1
FIRE Warning Light
Illuminated (red) – an engine, APU, wheel well, or cargo fire is detected
Cargo and APU Fire Protection Cargo and APU Fire Panel 1
ARMED
ARMED
2
FWD
AFT
APU BTL DISCH
5
FWD-ARM-AFT CARGO FIRE BTL DISCH
DISCH
APU
6
3 4
7
DISCH
AFT AISLE STAND
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Boeing B767 - Systems Summary [Fire Protection] 1
CARGO FIRE ARM Switches and Lights
Push FWD ARMED – Light Illuminates • arms all cargo fire extinguisher bottles • turns off both recirculation fans Push AFT ARMED – Light Illuminates • arms all cargo fire extinguisher bottles • turns off both the recirculation fans • inhibits high flow operation of both packs Off – normal position 2
CARGO FIRE Warning Lights (FWD or AFT)
Illuminated (red) – smoke is detected in associated cargo compartment 3
CARGO FIRE Bottle Discharge (BTL DISCH) Switch
Push – discharges the fire extinguisher bottles into the ARMED cargo compartment 4
CARGO FIRE Bottle Discharged (DISCH) Light
Illuminated (amber) – either extinguisher bottle has discharged or has low pressure 5
APU Fire Bottle Discharged (APU BTL DISCH) Light
Illuminated (amber) – the extinguisher bottle is discharged or has low pressure 6
APU Fire Warning Light
Illuminated (red) – an APU fire is detected 7
APU Fire Switch
In – normal position, mechanically locked; unlocks automatically if fire warning occurs Out – closes the APU fuel valve, and: • trips the APU generator off • closes the APU air supply valve • shuts down the APU • arms the APU fire extinguisher bottle Rotate – either direction discharges the APU fire extinguisher into the APU compartment
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Boeing B767 - Systems Summary [Fire Protection]
Wheel Well Fire Light WHL WELL FIRE
1
CENTER FORWARD PANEL 1
Wheel (WHL) WELL FIRE Warning Light
Illuminated (red) – a fire is detected in one or both of the main gear wheel wells
APU Ground Control Fire Protection Panel
APU F RE WARNING HORN
1
FIRE BOTTLE ARMED
APU FIRE
4 2
BOTTLE DISCHARGED
5 APU BOTTLE DISCHARGE
APU FIR SHUTDOWN SOUND LEVEL METER
3
6
FLIGHT DECK CALL
EMER EXIT LT TEST FL GHT INPH
SER ICE INPH
WHEELWELL LIGHTS
S NORM LS
NOSE WHEEL STRU
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Boeing B767 - Systems Summary [Fire Protection] 1
APU Fire Warning Horn
Sounds intermittently during ground operation for an APU fire 2
APU FIRE Light
Illuminated (red) – an APU fire is detected The APU automatically shuts down for a detected fire 3
APU FIRE SHUTDOWN Switch
Push – • closes the APU fuel valve and trips the APU generator off • closes the APU air supply valve and shuts down the APU • arms the APU fire extinguisher bottle 4
APU FIRE BOTTLE ARMED Light
Illuminated (amber) - the APU fire extinguisher is armed 5
APU Fire BOTTLE DISCHARGED Light
Illuminated (amber) - the APU fire extinguisher bottle is discharged or has low pressure 6
APU BOTTLE DISCHARGE Switch
Push – discharges the APU fire extinguisher bottle into the APU compartment
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Boeing B767 - Systems Summary [Fire Protection]
Fire/Overheat Test Panel FIRE/OVHT TEST WHL WELL
ENG/APU/ CARGO
SYS FAIL
2 1
FAIL P-RESET
3 4
AFT AISLE STAND 1
Wheel (WHL) WELL Fire Test Switch
Push and hold – initiates a wheel well fire test 2
System Fail (FAIL P – RESET) Light
Illuminated (amber) – indicates the failure of the detectors in one of the following systems: • engine fire • engine overheat • APU fire • cargo fire 3
System Fail (SYS FAIL) Reset Switch (FAIL P – RESET)
Push – extinguishes the FAIL light and resets the monitor for other systems 4
ENG/APU/CARGO Test Switch
Push and hold – initiates an engine, APU, and cargo fire/overheat test
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