Traffic Advisory Aural

When a traffic advisory occurs, the aural message TRAFFIC TRAFFIC comes on. This message tells the flight crew to monitor the display for intruder traffic.

Resolution Advisory

These are the two types of aural messages that can come on during a resolution advisory (RA):

· Preventive action RA

· Corrective action RA.

Preventive Action RA

This type of RA occurs when at the closest point of approach (CPA) the present vertical speed results in a safe altitude separation from the threat airplane. When this happens, the aural advisory is MONITOR VERTICAL SPEED - MONITOR VERTICAL SPEED. This message tells the flight crew to do these things:

· Maintain the flight path

Preventive Action RA

This type of RA occurs when at the closest point of approach (CPA) the present vertical speed results in a safe altitude separation from the threat airplane. When this happens, the aural advisory comes on.

These are the aural messages for the preventive action RA:

· MONITOR VERTICAL SPEED

· MAINTAIN VERTICAL SPEED, MAINTAIN

· MAINTAIN VERTICAL SPEED, CROSSSING MAINTAIN.

The preventive action RA messages tell the flight crew to do these things:

· Maintain the flight path

· Do not fly into the area of RA pitch symbol on the ADI

· Maintain the vertical speed rate.