In addition, both PFD’s will indicate 40 knots
and the Vspeed digits will be replaced by the
Low Speed Awareness cues which appear on
the airspeed tape during the test. A satisfac-
tory test is indicated when:
• Master Caution Chime and Lights.
• “L AOA HT FAIL” amber CAS message
illuminates.
• Low Speed Awareness (LSA) Indicator
rises to the airspeed pointer on the left
PFD as the AOA pointer (if installed)
sweeps the indicator scale.
• Stick shaker activates when LSA reaches
the indicated airspeed pointer.
• Aural master warning tone sounds fol-
lowed by a “STALL” voice message.
The above test takes approximately 5 seconds
to complete, and after a slight pause, the same
sequence occurs for the right side if the test
button is held depressed. When the right side
is testing, a “R AOA HT FAIL” CAS message
will be displayed.
STALL WARNING ELECTRICAL
POWER
The left and right stall warning systems are
power by the L and R Essential Busses re-
spectively. The circuits are protected by the L
STALL WARN and R STALL WARN circuit
breakers located in the FLIGHT group on the
pilot’s and copilot’s circuit breaker panels.
Since the left and right stall warning systems
do not have on-off switches, the correspond-
ing circuit breaker would have to be pulled to
turn off a malfunctioning system.
15-32
FOR TRAINING PURPOSES ONLY
LEARJET 45 PILOT TRAINING MANUAL
FlightSafety
international
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