-
The red sector is strictly forbidden.
OTHER aircraft PROXIMATE aircraft TA intruder RA intruder
Vertical speed trend
separation
3.1.7.1.3. Engine and Warning Display – EWD
When the flight crew sets the TCAS to STBY, the ALT RPTG to OFF, or the XPDR to STBY
from the ATC/TCAS panel, the green memo TCAS STBY is displayed on EWD.
3.1.7.2. TCAS AURAL ALERTS
TA and RA TCAS displays come with aural alerts. On A300/A310/A320/A330/A340 aircraft, the Flight Warning System (FWS) broadcasts these aural alerts through the loudspeakers, and the flight crew cannot modify their volume. On A380 aircraft, the FWS broadcasts the aural alerts through the loudspeakers and the headsets.
3.1.7.2.1. Traffic Advisory
Aural alerts Meaning
TRAFFIC TRAFFIC TCAS detects a TA aircraft.
3.1.7.2.2. Resolution Advisory
For all the aural alerts listed below, the TCAS detects an RA aircraft, and is able to order avoidance maneuvers (with intruder equipped with Mode C or S transponder).
Aural Alerts Meaning Required V/S (ft/min)
CLIMB, CLIMB Climb at a vertical speed in the green sector on PFD. +1 500
CLIMB, CROSSING CLIMB, CLIMB, CROSSING CLIMB Climb at a vertical speed in the green sector on PFD. The own flight path will cross through the intruder’s one. +1 500
INCREASE CLIMB, INCREASE CLIMB Increase the vertical speed to climb. It is triggered after a CLIMB advisory. +2 500
CLIMB, CLIMB NOW, CLIMB, CLIMB NOW Invert the vertical speed from DESCENT to CLIMB. It is triggered after a DESCEND advisory when a reversal in sense is required to achieve a safe vertical +1 500
- 3-14 -
Aural Alerts Meaning Required V/S (ft/min)
MAINTAIN VERTICAL SPEED, CROSSING MAINTAIN Maintain the current vertical speed. The own flight path will cross through the intruder one. Climb Min +1 500 Max +4 400 Descent Min –1 500 Max –4 400
CLEAR OF CONFLICT Calm down. The collision threat disappeared.
3.1.7.2.3. Aural Alert Priority
The FWS prioritizes aural alert with other systems as follows:
1.
Wind shear alert or stall alert
2.
TAWS alerts
3.
TCAS alerts.
In case of wind shear, stall, or GPWS warnings:
-FWS inhibits TCAS aural alerts
-
TCAS converts all RAs into TAs on ND
-
TCAS automatically sets the TA ONLY mode.
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