Narrative:

Transitioning to a left downwind for runway xy at ZZZ (we were approximately 8.4 miles south of airport). Twin aircraft flew over top of our aircraft and was in contact with tower as well as we were. Tower had us confirm our position and told other aircraft to stop descent and reported us as traffic to the other aircraft. The other aircraft flew over us from 11 o'clock to 5 o'clock and continued descent without ever seeing us. We took evasive action once we saw aircraft from rear seat and we descended and turned 20 degrees to the left to turn away from the other aircraft. The other aircraft never saw us as they were asking tower for our position all the way to their landing.

Google
 

Original NASA ASRS Text

Title: C172 instructor reported that while they were descending an aircraft flew overhead causing a NMAC.

Narrative: Transitioning to a left downwind for Runway XY at ZZZ (we were approximately 8.4 miles south of airport). Twin aircraft flew over top of our aircraft and was in contact with Tower as well as we were. Tower had us confirm our position and told other aircraft to stop descent and reported us as traffic to the other aircraft. The other aircraft flew over us from 11 o'clock to 5 o'clock and continued descent without ever seeing us. We took evasive action once we saw aircraft from rear seat and we descended and turned 20 degrees to the left to turn away from the other aircraft. The other aircraft never saw us as they were asking tower for our position all the way to their landing.

Data retrieved from NASA's ASRS site 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.