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It should also be selected during descent, within 15 NM of approach, if any of the following conditions applies:
.
Runway is less than 3,500 feet in length, or
.
Airport is not in the TAWS database, or
.
Intended approach is not compatible with TAWS terrain awareness alerting, or
.
QFE operation with no GPS available.
TAWS WARNING Panel Figure 17.10.32
Controls and Indicators
TAWS Controls and Indicators
Figure 17.10.33
NAVIGATION SYSTEMS Description Vol. 2 17.10.31
Oct 05/06
PFD Indications
Figure 17.10.34
TAWS Self-Test . Terrain Test Pattern
Figure 17.10.35
NAVIGATION SYSTEMS Description Vol. 2 17.10.32
Oct 05/06
MFD Terrain Abnormal Annunciations
Figure 17.10.36
EICAS Messages
The following white EICAS status messages are provided to inform the crew when TAWS functions are inoperative:
MESSAGE MEANING
All TAWS functions have failed. The windshear detection has failed.
Terrain database not available for current location.
The terrain awareness alerting and display functions and the terrain clearance floor function are inoperative due to a fault condition.
TAWS Modes 1.6 are failed.
The following table lists a summary of the TAWS modes and associated indications:
NAVIGATION SYSTEMS Description Vol. 2 17.10.33
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CL.605 Flight Crew Operating Manual
PSP 605.6
NAVIGATION SYSTEMS Description Vol. 2 17.10.34
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VHF NAVIGATION SYSTEM
Description
The aircraft is equipped with two digital VHF navigation (VHF NAV) receivers, which receive and process data from ground stations for en route navigation, precision approach and landing.
Components and Operation
Two VOR/LOC antennas are installed on the left and right sides of the vertical stabilizer. An antenna coupler, installed within the vertical stabilizer, balances the signal input from both antennas, and routes it to the VHF Nav receivers.
A single glideslope (GS) antenna is installed behind the radome, below the weather radar receiver/transmitter and antenna assembly. The GS antenna provides output to both VHF Nav receivers.
The two marker beacon antennas are installed on the bottom of the aft fuselage.
The VHF Nav receivers include fully integrated circuitry for receiving and processing of VOR, ILS (localizer, glideslope), marker beacon and ADF signals. The ADF is independent of the other Nav receiver functions, and is covered later in this chapter.
The VHF Nav receivers route navigation data to the IAPS for distribution to user systems, including the flight director, flight displays and the FMS. Station audio is provided to the aircraft’s audio integrating system.
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