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If a generator trips off-line, the switch displays
“OFF” and the CAS displays an amber “L or
R GEN FAIL” message (Table 2-2). In ac-
cordance with AFM procedures, the GEN
switch should be depressed once to attempt a
reset. If the generator does not reset, the switch
again illuminates “OFF.”
A dual generator failure warning consists of
a red “LR GEN FAIL” message on the CAS
and a red “GEN FAIL” annunciation on the
CWP.
The red “LR GEN FAIL” CAS will not illu-
minate on the ground with either T/L in cut-
off (white “L/R ENG SHUTDOWN” CAS
illuminated), but it will illuminate in flight if
both generators are OFF regardless of whether
either T/L is in cutoff.
L/R NON-ESS & L/R MAIN –
These mo-
mentary action switches are only depressed if
the crew needs to over-ride the automatic op-
eration of these busses during generator fail-
ure. The OFF indication changes automatically
to indicate bus condition. Selection of the switch
in normal operation (both generators on-line)
will isolate the corresponding bus and display
“OFF.” Reselection resumes normal operation.
The non-essential busses will automatically be
OFF whenever the electrical system is being
powered strictly by battery power and also in
flight if one generator fails. The main and non-
essential busses will automatically be shed in
flight if both generators have failed.
L/R AV MSTR –
These switches are alter-
nate action and allow the crew to connect or
disconnect both main avionics and essential
avionics busses. The main avionics bus con-
tactors automatically open during engine start
on the ground and during starter-assisted
airstart.
EMER BATT –
The bottom half of this al-
ternate action switch displays OFF when man-
ually selected to OFF (i.e. emergency battery
contactor de-energized). This switch is se-
lected on before engine start and will normally
remain on during flight. The OFF caption will
extinguish when the switch is selected on.
The top half of the EMER BATT switch dis-
plays “EMER” when the emergency battery is
powering the emergency battery bus and an air-
plane generator, GPU or APU is not provid-
ing power to the emergency battery bus. This
provides advisory information that the bat-
tery is discharging and should not be left on
for an extended period while on the ground.
In flight, this is an indication that generator
power to the emergency battery bus has been
lost and that the emergency battery is power-
ing the emergency battery bus. It is normal for
this annunciator to be illuminated during start
and for a short period before start when gen-
erator, GPU or APU power is not available. A
white EMER BATT annunciator on the crew
warning panel (CWP) also illuminates when
the emergency battery is discharging.
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
2-11
FOR TRAINING PURPOSES ONLY
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