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Turning on the battery along with STBY POWER will power the overhead panel indications.
There are a limited number of systems available with battery power only.
The STBY POWER switch controls power to the standby electrical bus. On the actual airplane
the standby buses power very essential services. The normal position is AUTO which means the
aircraft controls what power source flows to this bus. In the BAT position the battery powers
these buses and it is then possible to drain the battery dead.
The battery switch must be ON in order to start the APU.
© Holger Ludwig, EuCom Airlines & Terry Yingling Seite 34 von 53
http://www.eucomairlines.de
External Power
Click on the mounting screw at the top, right of the EXT PWR on the AC Bus subpanel will
toggle the external power on-off. EXT PWR AVAIL light will illuminate when external power
is on.
APU Power
The APU is an essential component of the aircraft’s electrical system. Not only will it power the
aircraft with sufficient power to run all systems it will provide the bleed air required to start the
engines. Without the APU you cannot start the plane <g. In real life you can hook up an
external air source for starting but we did not simulate that here. So you have to start the APU
for every flight if you don't want to fly a glider.
Starting the APU is straight forward. The BAT switch must be ON or the APU will not start.
Then click the mouse click area around the START part of the knob to initiate the start
sequence. The switch is spring loaded to the ON position so will quickly move back to ON. The
FAULT light will illuminate momentarily to indicate that the APU start sequence has begun.
There is an APU sound associated with the APU start up and eventual running. The RUN light
illuminates to indicate availability of APU power for electrical and pneumatic systems.
The APU GEN switch controls the application of APU power to the electrical system. The OFF
light illuminates if the switch is in the OFF position with the APU running or when the switch is
ON with the APU shut down. Pushing in the APU GEN switch will illuminate the flow bar and
extinguish the OFF light if APU power is available.
© Holger Ludwig, EuCom Airlines & Terry Yingling Seite 35 von 53
http://www.eucomairlines.de
AC BUS
There are two BUS OFF lights on the electric panel. These correspond to the left and right AC
buses. These buses are not powered on BAT power only...they need a generated source of
power. The most important bus on the 767 is the L AC BUS which powers the Captains
instruments. The airplane does all that it can to protect power to that bus. There are isolation
BUS TIE switches that control the flow of power to and from these buses. Most of the time they
are controlled automatically since the BUS TIE switch is normally left in AUTO. If the L AC
BUS is not powered there will be problems with the main panel.
Generators
Each engine has its own electrical generator that will provide power when it's engine N2 is at the
idle value. The left and right generators have three states; OFF, Online OFF and ON. With the
GEN button in the OFF position only the OFF light shows. This means that the generator
breaker is open and power is not applied to the airplane from this generator. In Online OFF the
GEN button pushed in but the engine is shut down or below the idle value. In Online Off both
the OFF and ON lights show. When the GEN button pushed in so only the ON light shows the
generator breaker is closed and power is provided from this generator to the electrical system.
© Holger Ludwig, EuCom Airlines & Terry Yingling Seite 36 von 53
http://www.eucomairlines.de
FUEL AND STARTING SYSTEMS
Fuel Panel
Complete fuel management is possible with the fuel panel, provided FS98 is set up to allow it.
In FS98 go to the FUEL page and check "Manual fuel control" active. This allow actions with
the fuel panel to properly affect the transfer of fuel.
Here is the fuel panel with all lights ON. PRESS lights in the AFT and FWD pump switches
indicate that the fuel pump pressure is low and will come on when the switch is off or if the tank
is out of fuel.
The center fuel pumps PRESS lights only illuminate when the pump switches are on and the
center tank is out of gas. There is no warning for when the center pumps are selected OFF.
EICAS messages will be presented for each fuel configuration.
There are three tanks on the 767. The two main wing tanks and the center tank. The main wing
tanks are each equipped with two fuel pumps: FWD and AFT. When only the L PUMPS, R
PUMPS, AFT and FWD are on, the fuel panel is configured for fuel to be fed to the engines from
　
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