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EMER BUS mode. The overspeed warning horn will sound under
any of the following conditions :
1. Airspeed exceeds VMO.
2. Mach exceeds MMO.
NOTE: When Mach trim is inoperative and autopilots are disengaged,
the maximum allowable pointers will reposition to reflect
the reduced MMOfor this condition.
SYSTEM TEST SWITCH - OVERSPEED WARNING FUNCTION
The rotary-type system test switch, located on the pilot's instrument
panel, is used to test the overspeed warning system. The test sequence
is initiated by rotating the system test switch to ADC and then
depressing the switch PRESS TEST button. When the test sequence is
initiated, the pilot's air data system will test and the overspeed warning
horn will sound, then the copilot's air data system will test and
the overspeed warning hom will sound. Refer the Bendix/King KFC
3100 Flight Control System Pilot's Guide for a detailed explanation of
the air data system self-test.
5-8
PM-121
Change 2
Learjet 31A
Pilot's Manual
TRAFFIC ALERTAND COLLISION AVOIDANCE SYSTEM (TCAS-1)
(OPTIONAL)
The TCAS-I system provides the crew with aural and visual indications
of potentially dangerous flight paths relative to other aircraft in the vicinity.
The system interrogates other transponder-equipped aircraft
and determines their bearing, range, and relative altitude if the intruder
has altitude encoding transponder in operation. With this information
theWASprocessor can generate aural and visual advisories to the
crew.
The TCAS-I system consists of a processor, TPR/TCAS control unit,
twobearing antennas, aTCAS ONLY display on theMFD(selectable by
theWD control panel), remote TCAS status annunciator and associated
aircraft wiring. System control is through the TPR/TCAS control
unit. Power for the system operation is 28 VDCsupplied through the 5-
amp WAScircuit breaker on the copilot's circuit breaker panel.
Advisories are issued to the crew via the aircraft audio system, the
MFD, and a remote annunciator located above the MFD. Aural advisories
generated by the ground proximity/windshear warning system (if
installed) will have priority over aural advisories generated by the
WAS-1.
Refer to the applicable AFM supplement and Bendix/King Pilot's
Guides for further details and operating instructions.
TRAFFIC ALERTAND COLLISION AVOIDANCE SYSTEM (TCAS-10
(OPTIONAL)
The TCAS-II system provides the crew with aural and visual indications
of potentially dangerous flight paths relative to other aircraft in
the vicinity. The system interrogates other transponder-equipped aircraft
and determines their bearing, range, and altitude. With this information
the WAS processor can generate Traffic Advisories (TA) and
Resolution Advisories (RA) to prevent or correct traffic conflicts.
The TCAS-II system consists of a processor, TPR/TCAS control unit,
two bearing antennas, remote WAS status annunciator and associated
aircraft wiring. System control is through the TPR/TCAS control unit.
Power for the system operation is 28 VDCsupplied through the 5-amp
WAS circuit breaker on the copilot's circuit breaker panel.
PM-121
Change 4
5-8A
Pilot's Manual
Learjet 31A
Advisories are issued to the crew via the aircraft audio system, the
MFD, the pilot and copilot altitude/vertical speed indicators, and a remote
annunciator located above the MFD. Aural advisories generated
by the ground proximity/windshear warning system (if installed) will
have priority over aural advisories generated by the TCAS-II.
Refer to the applicable AFM supplement and Bendix/King Pilot's
Guides for further details and operating instructions.
GROUND PROXIMITY WARNING SYSTEM WITH WINDSHEAR
WARNING (GPWS) (OPTIONAL)
The MK-VII Warning System (GPWS/WS) provides the pilot with aural
and visual warning of potentially dangerous flight paths relative to
ground and windshear conditions.
The system automatically and continuously monitors the airplane's
flight path with respect to terrain when the aircraft is below 2450 feet
radio altitude (altitude AGL). If the airplane's projected flight path
would imminently result in terrain impact, the system issues appropriate
visual and voice warnings. Warnings are issued for excessive sink
rate, excessive terrain closure rate, descent after takeoff or missed approach,
proximity to terrain with flaps and/or gear up, descent below
glideslope, and descent below decision height (DH).
The system computes windshear and alerts the crew of windshear of
sufficient magnitude to be hazardous to the aircraft. Windshear alerts
are given for increasing headwind/decreasing tailwind and/or updraft.
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