Learjet 60 - Page 76

Lear
e160

Pilot's Manual
APU CONTROL PANEL
The APU control panel, located above the copilot's circuit breaker pan-
el, houses the necessary controls for operation and monitoring . APU
fire detection/extinguishing controls are also located on the APU
control panel .
APU AMPS INDICATOR
The
AMPS
indicator is a digital display indicating the amperage output
of the APU generator (shows
zero
during start) .
Display
will flash
when current is at or above 400 amps .
APU
FIRE
PM-i23
Change 4
APU CONTROL PANEL
Figure 2-10
This switch/ indicator is used to show an APU
system
fire
or
overheat
(800°F at a single point in the fire loop or 375°F within overall length of
the fire loop) and activate the APU fire extinguishing system . Should
there
be a fire/overheat in the APU, as detected by the fire loop, the
FIRE switch/ indicator will indicate FIRE (red),
the aircraft Master
WARN light will illuminate, and the APU fire warning horn will sound .
The fire detection/ extinguishing system will automatically shut down
the APU
by
closing the
fuel shutoff valve, and activate the fire
extinguisher within 15 seconds .
Depressing the FIRE switch/ indicator will also shut down the APU
and discharge the APU fire extinguishing
bottle .
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