CHAPTER 13
Ground Emergencies
13.1 LOSS OF DC ESSENTIAL BUS
With WonW and both GENs offline, the Essential Bus is powered by the battery through the battery
contactor. If the battery contactor fails to apply power to the Essential Bus, the following cautions
and/or failures are displayed together and indicate an essential bus failure:
· L and R OIL PR cautions
· BINGO caution
· NWS caution
· FIRE EXTGH READY light on
· SPN RCVY light on
· Landing gear position lights inoperative
· UHF 1 and 2 inoperative
· Fuel dump inoperative
· HOOK position light inoperative
If a loss of the DC Essential Bus is suspected -
1. BATT switch - CYCLE
2. Electrical RESET button - PUSH
3. GEN switches - CYCLE
If DC Essential Power not restored -
4. APU start and crossbleed capability are lost.
13.2 ENGINE FAILS TO START/HUNG START
If no EGT rise within 20 seconds after throttle advance or rpm stabilizes below IDLE -
1. Throttle affected engine - OFF
2. Continue cranking for 3 minutes.
After 3 minutes -
3. ENG CRANK switch - OFF
4. APU switch - OFF
13.3 HOT START
If EGT climbs rapidly through 750¡C -
*1. Throttle affected engine - OFF
2. Continue cranking until EGT below 200°C. (If starter cuts out, reengage ENG CRANK switch.)
A1-F18EA-NFM-000
V-13-1 ORIGINAL
When EGT below 200¡C -
3. ENG CRANK switch - OFF
4. APU switch - OFF
13.4 GROUND FIRE
Several fire conditions exist that may be detected and signalled by ground crew without corresponding
cockpit FIRE indications. These may include, for example, APU exhaust torching, ignition of fuel
or other flammable liquids exposed to hot surfaces, or brake assembly flash fires. Aircraft location and
the nature of the fire condition will determine the course of action. If a fire occurs during hot refueling,
the pilot must decide whether to taxi clear or shutdown immediately.
Brake flash fires can occur if excess grease or residual/leaking brake fluid have built up in the wheel
brake assembly or on the carbon discs. These materials may ignite at normal post landing brake
temperatures. Visible flames may extend from the wheel assembly while flammable material is being
consumed, and smoke may be visible for a short time after the fire goes out.
In most cases, if ground crew signal a fire condition, the aircraft should be stopped and shutdown
immediately. If the fire is related to the wheel brake system, consider chocking the nosewheel and
leaving the parking brake released to reduce the amount of heat transferred from the brakes to the
wheel assembly or to isolate a brake fluid leak which may feed a wheel brake fire.
13.5 EMERGENCY EGRESS
1. Canopy - OPEN (CANOPY switch, CANOPY JETT handle, or canopy handcrank)
CANOPY JETT rocket thrusters may ignite spilled fuel or hydraulic
fluid and may injure ground crew in the immediate vicinity.
NOTE
· The CANOPY switch should be used to raise the canopy unless there
are overriding circumstances. If weight is not on the left main gear
(e.g., gear up landing), the CANOPY switch must be held to raise the
canopy.
· The CANOPY JETT handle is the only means of opening the canopy
from the rear cockpit of the F/A-18F.
· If electrical power is not available, the canopy must be jettisoned or
raised with the handcrank.
A1-F18EA-NFM-000
V-13-2 ORIGINAL
2. Harness and leg restraints - RELEASE
NOTE
Several options exist for releasing the harness and leg restraints. (1) All
four harness buckles and all four leg restraints can be manually
released. (2) The upper Koch fittings can be manually released and the
manual override handle can be pulled to release the leg restraints and
the survival kit. The survival kit will be retained and may hamper
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