Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Commercial; Flight Crew Multiengine
Flight Crew Last 90 Days 73; Flight Crew Total 340; Flight Crew Type 312
Communication Breakdown; Situational Awareness; Training / Qualification
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Executed Go Around / Missed Approach
Human Factors
My student and I were flying a C172 on the RNAV XY at ZZZ; planning to circle-to-land on Runway XX. We made radio calls on CTAF for 10 miles; 5 miles; 3 miles; and when starting to circle. We only heard calls from a plane on short final. During the circling procedure; before we were established on downwind; my iPad with ADS-B In (via Sentry) alerted that there was traffic 10 o'clock; less than a mile. Both my student and I observed the other aircraft; a C152; pass less than 200 feet above us and less than 500 feet horizontally away. I made another call on CTAF and the C152 finally made a radio call that they were performing a teardrop maneuver to the downwind. My student and I proceeded to do a touch-and-go and fly the missed approach procedure on the RNAV XY. We did not hear any more radio calls from the other plane.
Flight Instructor with a student flying a Cessna 172 reported a NMAC on final approach.