Narrative:

I was providing flight instruction and practicing touch and goes at an outlying field. We used standard radio broadcasts on the CTAF when a pilot flying aircraft Y advised they were inbound from 3 miles to the north at 1400 ft. Next aircraft Y advised it was descending for the 45 entry to right downwind. At this time; we were on a right crosswind climbing through 850 ft approaching our right turn to downwind. I was looking for aircraft Y in the area when he broadcasted again turning on the 45 towards downwind. As we started our turn to right downwind; aircraft Y was at approximately 1000 ft; flew through the traffic pattern from south to north; then turned westbound; directly into our path head on from a distance of approximately 1/4 the runway length (approximately 1000-1200 ft horizontally) at our altitude. I immediately took control of our airplane from my student and had to make a diving turn to the left. I was unable to turn to the right as expected because aircraft Y continued a 270 degree turn to the left overhead of us (directly in the middle of the downwind leg near the corner where we turned crosswind to downwind). I told the pilot over the radio they almost hit us and asked over if they saw us. The pilot of aircraft Y did not respond. I asked if it was a solo student and they said 'yes'. I remained clear of aircraft Y; climbed back to tpa and reentered downwind in the #2 position; behind aircraft Y. Aircraft Y did a touch n go; then performed a straight out departure. I checked the registration and found it was a plane belonging to a nearby flight school. I called them and left a message for the head instructor with a brief description. He has not returned my call. I am concerned for this student's safety as well as the flying public. Their actions are indicative of someone who needs further instruction before flying solo.

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Original NASA ASRS Text

Title: Instructor pilot reported an airborne conflict at O88 with another aircraft in the landing pattern.

Narrative: I was providing flight instruction and practicing touch and goes at an outlying field. We used standard radio broadcasts on the CTAF when a pilot flying Aircraft Y advised they were inbound from 3 miles to the north at 1400 ft. Next Aircraft Y advised it was descending for the 45 entry to right downwind. At this time; we were on a right crosswind climbing through 850 ft approaching our right turn to downwind. I was looking for Aircraft Y in the area when he broadcasted again turning on the 45 towards downwind. As we started our turn to right downwind; Aircraft Y was at approximately 1000 ft; flew through the traffic pattern from south to north; then turned westbound; directly into our path head on from a distance of approximately 1/4 the runway length (approximately 1000-1200 ft horizontally) at our altitude. I immediately took control of our airplane from my student and had to make a diving turn to the left. I was unable to turn to the right as expected because Aircraft Y continued a 270 degree turn to the left overhead of us (directly in the middle of the downwind leg near the corner where we turned crosswind to downwind). I told the pilot over the radio they almost hit us and asked over if they saw us. The pilot of Aircraft Y did not respond. I asked if it was a solo student and they said 'Yes'. I remained clear of Aircraft Y; climbed back to TPA and reentered downwind in the #2 position; behind Aircraft Y. Aircraft Y did a touch n go; then performed a straight out departure. I checked the registration and found it was a plane belonging to a nearby flight school. I called them and left a message for the head instructor with a brief description. He has not returned my call. I am concerned for this student's safety as well as the flying public. Their actions are indicative of someone who needs further instruction before flying solo.

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.