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Maintain Vertical Speed, Crossing Maintain Maintain climb rate
Traffic, Traffic Traffic Advisory
Sep 13/2004 Flight Crew Operating Manual Volume 2 REV 1 CSP 100-6
17-01-11 TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS) (Cont)
PFD TCAS INDICATIONS
Resolution Advisories are presented on the PFD.
The word TRAFFIC appears below the altitude strip display on the PFD in the colors indicated below:
-Red TRAFFIC appears for a Resolution Advisory (RA)
-Amber TRAFFIC appears for a Traffic Advisory (TA)
-White TCAS TEST appears when the system is tested
-White TA ONLY appears when RA is inhibited
-White TCAS OFF appears when the system is off
The failure messages appear on the VSI and MFD. They are:
-TCAS RA FAIL
-TCAS FAIL
TCAS RESOLUTION ADVISORIES (RA) INHIBITS
TCAS Resolution Advisories (RA) and some aural alerts are inhibited below certain radio altitudes. Radio altitudes and the associated RA status are as follows:
RADIO ALTITUDE RESOLUTION ADVISORY (RA) STATUS
Below 900 ft AGL, descending Below 1100 ft climbing All RA’s inhibited. (TA ONLY) and TA Aural message inhibited
Below 1000 ft AGL descending Below 1200 ft climbing “DESCEND RA” inhibited
Below 1450 ft AGL “INCREASE DESCENT” inhibited
Volume 2 Flight Crew Operating Manual Sep 13/2004 CSP 100-6 REV 1
17-01-12
DESCRIPTION
The primary purpose of the terrain awareness warning system (TAWS) is to provide alerts and warnings to avoid controlled flight into terrain (CFIT) and to provide detected windshear warning. The system provides the flight crew with aural alert messages and visual annunciations and displays in the event that the boundaries of any alerting envelopes are exceeded.
The TAWS contains three systems in one line replaceable unit.
-Ground proximity
-Terrain/obstacle awareness
-Windshear systems
The Ground Proximity Warning System (GPWS) produces warnings that require action based on real time input to the GPWS. These warnings help prevent CFIT and are categorized into 5 modes. Each mode has a distinct aural and visual alerts. The GPWS is also capable of providing a sixth mode, which can include altitude related callouts and excessive bank angle callout. The displays provide the PULL UP and GND PROX GPWS annunciations on the PFD.
Mode 7 provides windshear caution or warning alerts if threshold values along the flight path and perpendicular to the flight path are exceeded. The displays provide WINDSHEAR annunciations of the PFD.
The Enhanced Ground Proximity Warning Computer (EGPWC) processes all inputs and provides all aural and visual alerts and warnings.
A warning annunciation indicates a prediction of impact with terrain. All annunciations are displayed on pilot and copilot PFDs.
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