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Electrical power from the 28 vdc essential bus is required to operate the fire detection and
extinguishing systems. The systems can operate on battery power alone with the BATT switch ON.
A separate dry bay fire suppression (DBFS) system is incorporated to automatically detect and
extinguish a fire or explosion in the dry bays below fuel tanks 2, 3, and 4.
2.14.1 FIRE Lights. Two FIRE warning lights, one for each engine/AMAD bay, are located on the
upper left and right sides of the main instrument panel. The warning lights come on when a fire
condition is detected in the respective engine/AMAD bay. The left FIRE light indicates a fire condition
in the left engine/AMAD bay. The right FIRE light indicates a fire condition in the right engine/
AMAD bay.
Each light is also a pushbutton, which is guarded to prevent inadvertent actuation. Pushing the left
or right FIRE light arms the fire extinguisher bottle (FIRE EXTGH READY light on) and closes the
corresponding feed tank shutoff valve, the crossfeed valve, and the crosscooling valve.
To reduce the likelihood of damaging an engine VEN/start pump, which
is fuel lubricated, FIRE light shutdowns should only be performed when
directed by NATOPS (during actual emergencies or an FCF A profile).
If a FIRE light is pressed, the pushbutton stays in and approximately 1/8 inch of yellow and black
stripes is visible around the outer edges of the light.
2.14.2 APU FIRE Light. The APU FIRE warning light is located on the main instrument panel
inboard of the right FIRE light. The APU FIRE light comes on when a fire condition is detected in the
APU bay. The APU FIRE light is also a pushbutton. Pushing the APU FIRE light arms the fire
extinguisher bottle (FIRE EXTGH READY light on) and secures fuel to the APU. If the APU FIRE
light is depressed, the pushbutton stays in and approximately 1/8 inch of yellow and black stripes is
visible around the outer edges of the light.
2.14.3 FIRE Warning Voice Alerts. When the left, right, and /or APU FIRE lights are illuminated,
the ENGINE FIRE LEFT, ENGINE FIRE RIGHT, or APU FIRE voice alerts, respectively, are also
activated. If more than one FIRE light comes on at the same time, the voice alert priority is LEFT,
RIGHT, then APU.
2.14.3.1 FIRE Warning Lights (F/A-18F). The rear cockpit left, right, and APU FIRE warning lights
are advisory only. These lights are not pushbuttons, and they do not arm the fire extinguisher bottle
or shut down the engines or APU.
A1-F18EA-NFM-000
I-2-102 ORIGINAL
2.14.4 FIRE EXTGH READY/DISCH Light. The FIRE EXTGH READY/DISCH light is located on
the MASTER ARM panel on the left side of the main instrument panel. The top half of the light is
yellow and is labeled READY. The bottom half of the light is green and is labeled DISCH. When the
fire extinguisher bottle is armed (left, right, or APU FIRE light depressed), the yellow READY light
is illuminated.
The FIRE EXTGH READY/DISCH light is also a pushbutton. When the READY light is on,
pushing the light discharges the fire extinguisher bottle into the selected engine/AMAD/APU bay(s).
If more than one FIRE light is depressed, extinguishing agent is distributed to all selected bays, but
concentration may be insufficient to extinguish both fires. When pressure is lost in the fire extinguisher
bottle, the green DISCH light comes on.
2.14.5 APU Fire Extinguishing System. The APU fire extinguishing system is automatically activated
with WonW and must be manually activated with WoffW. If an APU fire condition is detected
with WonW, the automatic function secures fuel to the APU, arms the fire extinguisher bottle, and
after 10 seconds discharges the fire bottle. Discharge of the bottle is delayed for 10 seconds to allow the
APU time to spool down before extinguishing agent is introduced.
Manual activation is accomplished by pushing the APU FIRE light and then the FIRE EXTGH
READY light. Like automatic activation, discharge of the bottle is delayed for 10 seconds after the
APU FIRE light is pushed. If an APU FIRE condition is detected with WonW, manual activation
should be performed to backup the automatic system.
Since the fire extinguishing system requires 28 vdc essential bus power,
the fire extinguisher bottle may not be discharged if the BATT switch is
turned off during the 10 second delay time.
2.14.6 Engine/AMAD Fire Extinguishing System. The engine/AMAD fire extinguishing system
must be manually activated. Manual activation is accomplished by lifting the guard and pressing the
corresponding FIRE light and then the FIRE EXTGH READY light. Pushing the FIRE light secures
fuel to the engine at the feed tank shutoff valve and isolates the left and right fuel systems by closing
the crossfeed and crosscooling valves. When the FIRE EXTGH READY light is pushed, the fire
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本文链接地址：
NATOPS Flight Manual 飞行手册 1(84)
