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closure rate (Flaps
notextended)
“TERRAIN TERRAIN” GND PROX “PULL UP” “PULL UP”
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−41
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
ENHANCED GROUND PROXIMITY WARNING SYSTEM (EGPWS) (CONT'D)
MODE CONDITION
AURAL WARNING
LEVEL 1
VISUAL
WARNING
LEVEL 1
AURAL
WARNING
LEVEL 2
VISUAL
WARNING
LEVEL 2
2B
Excessive terrain
closure rate (Flaps
fullyextended)
“TERRAIN TERRAIN” GND PROX “PULL UP” “PULL UP”
3
Altitude loss after
takeoff or go-around
“DON’T SINK
DON’T SINK”
GND PROX None None
4A
On approach with
gear and flaps up
“TOO LOW
TERRAIN”
GND PROX
“TOO LOW
GEAR”
GND PROX
4B
On approach with
gear down and flaps
not in landing
configuration
“TOO LOW
TERRAIN”
GND PROX
“TOO LOW
FLAPS”
GND PROX
4C
Takeoff or go-around
unsafe terrain
clearance
“TOO LOW
TERRAIN”
GND PROX None None
5
Descent below
glideslope
“GLIDESLOPE
GLIDESLOPE”
(Soft alert)
GND PROX
“GLIDESLOPE
GLIDESLOPE”
(Hard alert)
GND PROX
6
Approaching
minimums
“APPROACHING
MINIMUMS”
None None None
6 Minimums MINIMUM” None None None
6 Altitude callouts
1000, 500, 50, 40, 30,
20, 10 feet RA
None None None
6
Excessive Bank
Angle
“BANK ANGLE” None None None
7
Windshear Alerting
caution (increasing
performance) warning
(decreasing
performance)
None
Amber
WINDSHEAR
on PFD
“WINDSHEAR,
WINDSHEAR,
WINDSHEAR”
Red
WINDSHEAR
on PFD
Terrain look ahead
“CAUTION TERRAIN
CAUTION TERRAIN”
GND PROX
“TERRAIN,
TERRAIN PULL
UP”
“PULL UP”
Obstacle detection
“CAUTION
OBSTACLE
CAUTION
OBSTACLE”
GND PROX
“OBSTACLE,
OBSTACLE
PULL UP”
“PULL UP”
Terrain clearance
floor
“TOO LOW
TERRAIN”
GND PROX None None
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−42
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
VHF NAVIGATION SYSTEM
Description
The VHF navigation system is a dual-receiver system used for en route navigation and for
precision approach and landing. Signals from VHF omnirange (VOR), instrument landing system
(ILS) stations, and marker beacons are received and processed. Separate VOR and ILS modes of
operation are provided.
The VHF navigation system consists of two VHF navigation receivers and associated antennas.
Components and Operation
VHF Navigation Receiver
The VOR/LOC receiver operates in the frequency range of 108.0 MHz through 117.95 MHz. The
frequencies are spaced 50 kHz apart, giving 200 channels. Forty channels are designed for
localizer and 150 channels are assignment to VOR. The frequency range of the glideslope
receiver is 329.15 to 335.00 MHz. There are 40 channels with 150-kHz spacing. The localizer
and glideslope channels are paired. The marker beacon operates on a fixed frequency of 75.0
MHz.
The VHF NAV 1 receiver is powered by the DC essential bus, and VHF NAV 2 by DC bus 2.
Nav Tuning
NAV tuning is normally performed from the top level page of the on-side RTU (see
Figure 17−10−45). Tuning may also be accomplished by the cross-side RTU or by the FMS
CDU.
When the NAV main display page is selected, the sensitivity of the marker beacon receiver can
be controlled via the MKR SENS line select key.
Course Selection and Tracking
The desired VOR/LOC course may be displayed on the PFD horizontal situation indicator (HSI),
by selecting VOR/LOC using the NAV SOURCE knob on the DCP, and then setting the desired
course with the COURSE knob on the flight control panel (FCP). Pushing the PUSH DIRECT
inset button of the COURSE knob on the FCP sets the VOR course direct to the tuned VOR
station.
The VOR/LOC course may also be displayed on the HSI and NAV SECTOR formats of the
MFD.
Tracking of the VOR/LOC course is accomplished using the flight director and autopilot. For
more information, see Chapter 4, Automatic Flight Control System.
　
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