Operation Manual Part 2

Aerosoft – Digital Aviation
CRJ-70 & CRJ-900
AOM PART 2
Systems Description
VOL
5
5-1-106
26-Jul-2017
TRAFFIC ADVISORY (TA)
A traffic advisory, TA is triggered when the relative position of intruding aircrafts is 45 seconds from the closest
point of approach and 1,000 feet or less above or under the aircrafts current altitude.
The TA is displayed on the PFD as well as on the MFD when TCAS mode is active.
It allows the crew to visually locate the intruding aircraft and the TA disappears automatically as soon as
vertical distance is 1,000ft or higher and/or is more than 45 seconds from the closest point of approach.
TAs are also accompanied by a voice warning.
RESOLUTION ADVISORY (RA)
A resolution advisory, RA, is triggered when the intruding aircraft is 30 seconds from the closes point of
approach.
The RA will display either a climb or descent to increase separation and avoid a conflict. Hence it is displayed
on the vertical speed indicator, VSI section of the PFD.
There are two kinds of RAs:
• Corrective RAs which show a red and a green zone on the VSI –
always fly from the red to the green zone
• Preventive RAs which only indicate red zones into which you must not fly.
RAs are also accompanied by voice warnings.