Narrative:

While navigating in the north practice area; the pcas alerted us to traffic 1 mile and plus 500 ft. I obtained a visual on the traffic and pointed it out to my student. While transmitting our position and its relation to the other traffic; they turned and started a steep descent in our direction. Seeing the aircraft change of flight path; I initiated a descent and turned away from the traffic. They still passed within 300 ft directly above our position. We never had communication with the aircraft. They never made any radio calls of which we were aware. Both myself and the student will use even more caution in operations in heavily congested practice areas.

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Original NASA ASRS Text

Title: A PA28 instructor reported a NMAC with another aircraft in a training area after the crew was first notified of the other aircraft by PCAS.

Narrative: While navigating in the north practice area; the PCAS alerted us to traffic 1 mile and plus 500 FT. I obtained a visual on the traffic and pointed it out to my student. While transmitting our position and its relation to the other traffic; they turned and started a steep descent in our direction. Seeing the aircraft change of flight path; I initiated a descent and turned away from the traffic. They still passed within 300 FT directly above our position. We never had communication with the aircraft. They never made any radio calls of which we were aware. Both myself and the student will use even more caution in operations in heavily congested practice areas.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.