OPERATIONS MANUAL

Electrical
Overhead Panel:
Bus tie switch
AUTO Enables system logic to
operate the respective
BTB and DCIR.
blank Opens the BTB and
DCIR, and resets the
fault trip logic.
ISLN
LIGHT
The BTB is open and
the AC bus is isolated
from the synchronous
bus (automatic isolation
during autoland will not
illuminate the light).
Drive disconnect switch (guarded and wired)
(In the simulator, the guard can be rewired
on Instructor > Situation > Service with the
button Rewire switchguards.)
Push (momentary action) Disconnects the
IDG’s mechanical drive shaft from the
engine gearbox. It is reconnectable only
by maintenance on the ground (in the
simulator reconnectable on Instructor
> Situation > Malfunctions > General
under Reset: Malfunctions).
DRIVE
LIGHT
Oil pressure or oil temperature in drive
is not in normal range.
Generator control switch
ON Closes the respective
IDG generator field and
enables system logic to
operate the GCB.
blank Opens the generator
field and GCB, and
resets the fault trip
logic.
OFF
LIGHT
The GCB is open and
IDG power is removed
from the AC bus.
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