Narrative:

The active runway was 29. I was on base leg with my student; there were 3 other planes in the pattern and 4 waiting for takeoff at the end of the runway when aircraft Y did an apparent go around from [runway] 11 and cut right in front of me. This distance was 300 ft or less and caused me to use evasive action. They had not used the radio at all. Then they asked what was the active runway. I told them; then they lined up for runway 23 which we do not have; for landing. The pattern was very busy and if they had flown over the field they easily could have seen what runway was the active. This was witnessed by all the planes at the 29 end that were waiting for takeoff.

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Original NASA ASRS Text

Title: Instructor pilot reported a NMAC with an aircraft that was not flying the correct pattern.

Narrative: The active runway was 29. I was on base leg with my student; there were 3 other planes in the pattern and 4 waiting for takeoff at the end of the runway when Aircraft Y did an apparent go around from [Runway] 11 and cut right in front of me. This distance was 300 ft or less and caused me to use evasive action. They had not used the radio at all. Then they asked what was the active runway. I told them; then they lined up for Runway 23 which we do not have; for landing. The pattern was very busy and if they had flown over the field they easily could have seen what runway was the active. This was witnessed by all the planes at the 29 end that were waiting for takeoff.

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.