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all of the following voice alerts in order: ²ENGINE FIRE LEFT, ENGINE FIRE RIGHT, APU FIRE,
BLEED AIR LEFT, BLEED AIR RIGHT² (each repeated twice).
The BALD controller is sensitive to the duration of FIRE test switch actuation. If the switch is not
held in the TEST A or TEST B position for at least two seconds, the BALD controller may set a false
MSP code. Additionally, the BALD controller requires 3 seconds between TEST A and TEST B to
successfully reset. If the switch does not remain in NORM for at least 3 seconds, the BALD controller
may not successfully initiate the bleed air warnings and may set a false MSP code.
2.14.9 DBFS - Dry Bay Fire Suppression System. An active DBFS system is incorporated in the
center dry bays under fuel tanks 2, 3, and 4 to automatically extinguish any fires or explosions which
are detected in these areas. The system consists of fourteen optical fire detectors, seven extinguishing
units and a control unit. The control unit integrates system operation and performs BIT. If the DBFS
system fails BIT, a BIT advisory appears, and DBFS BIT status indicates DEGD.
The DBFS system is totally automatic and requires no aircrew action. The system is armed and
capable of suppressing a fire/explosion in the dry bays when the LDG GEAR handle is up and at least
one generator is on line. If a fire/explosion is detected, the controller discharges all extinguishers,
flooding all dry bays with an inert gas (BAY DISCH caution set). If a fire condition is still detected
after 3 seconds, a BAY FIRE caution is set to alert the aircrew that the fire was not extinguished. If
the fire condition ceases, the BAY FIRE caution resets. With the LDG GEAR handle down, the system
still gives a fire warning (BAY FIRE caution) but is not capable of extinguishing a dry bay fire.
A1-F18EA-NFM-000
I-2-105 ORIGINAL
2.15 ENTRANCE/EGRESS SYSTEMS
2.15.1 Canopy System. The cockpit is enclosed by a clamshell type canopy. The main components
of the canopy system are an electromechanical actuator, which provides powered and manual operation
of the canopy, and a cartridge actuated thruster with associated rocket motors, which provides
emergency jettison. When closed, the canopy is latched in place by three hooks on the bottom of each
side of the canopy frame and two forward indexer pins on the lower leading edge of the canopy frame.
When the canopy is closed, the latch hooks and indexer pins engage fittings along the canopy sill, and
the canopy actuator rotates the canopy actuation link over-center, locking the canopy. A mechanical
brake in the canopy actuator motor provides a redundant lock. An inflatable seal, installed around the
edge of the canopy frame, retains cockpit pressure when the canopy is locked. A rain seal is installed
outboard of the pressure seal to divert rain water away from the cockpit. See figure 2-32.
A high voltage (100,000 volt) static electrical charge may build up inflight
and be stored in the canopy. If possible, make sure that ground crew
discharge the static electricity prior to egress. Otherwise, avoid direct
contact with the outside of the windscreen and canopy to prevent
electrical shock.
Taxiing with the canopy at an intermediate position can result in canopy
attach point damage and failure. Do not open or close the canopy with the
aircraft in motion.
2.15.1.1 Canopy Operation. During normal operation, the canopy is electrically actuated using
either the internal CANOPY switch or external canopy switch. The canopy actuator is powered by the
maintenance bus, which is powered directly by the battery in the absence of ac power (BATT switch
ON or OFF). On battery power, at least five open/close cycles should be available. With the canopy
open, the CANOPY switch must be held to lower the canopy to the rails, slide it approximately 1.5
inches forward, and lock it in place. With the canopy closed and locked, selecting OPEN on the
CANOPY switch (WonW) automatically unlocks and opens the canopy to the full up position. The
switch does not have to be held. Whether the canopy is opening or closing, selecting HOLD stops the
canopy at its present position.
If electrical power is not available, the canopy can be manually operated using either an internal or
external crank system. The canopy can also be jettisoned using one of the internal CANOPY JETT
handles or the external canopy jettison handle.
2.15.1.1.1 CANOPY Switch (Internal). The internal CANOPY switch is located beneath the right
canopy sill in the front cockpit only. The canopy cannot be electrically opened or closed from the rear
cockpit of an F/A-18F. The CANOPY switch is spring loaded to the HOLD position and is
solenoid-held in the OPEN position only with WonW. The solenoid can be overridden at any time by
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本文链接地址：
NATOPS Flight Manual 飞行手册 1(86)
