Narrative:

A student and I were working the traffic pattern at mckinney airport, practicing takeoffs and lndgs. We had just turned base leg, when over the radio, another plane reported there were 2 planes on base leg. He did not identify what airport the planes were on base for. After scanning the area and not locating the planes, student and I determined that they were at another airport. We continued and completed a normal approach and touch and go. A few mins later, over the radio, a plane began complaining of another plane that had cut him off in the traffic pattern, at mckinney, and threatening to report him to the FAA. My student and I listened, not thinking that he was referring to or accusing us. We had been following another small aircraft a and the plane that was doing the complaining was an small aircraft B. A few mins later, the small aircraft B called us up and asked us for our full call sign, as we were making our radio calls using an abbreviated call sign. That was our first indication that he was talking about us.

Google
 

Original NASA ASRS Text

Title: INSTRUCTOR AND STUDENT UNAWARE OF SECOND ACFT ON BASE LEG. PLT OF SECOND ACFT CLAIMS HE WAS CUT OFF.

Narrative: A STUDENT AND I WERE WORKING THE TFC PATTERN AT MCKINNEY ARPT, PRACTICING TKOFS AND LNDGS. WE HAD JUST TURNED BASE LEG, WHEN OVER THE RADIO, ANOTHER PLANE RPTED THERE WERE 2 PLANES ON BASE LEG. HE DID NOT IDENT WHAT ARPT THE PLANES WERE ON BASE FOR. AFTER SCANNING THE AREA AND NOT LOCATING THE PLANES, STUDENT AND I DETERMINED THAT THEY WERE AT ANOTHER ARPT. WE CONTINUED AND COMPLETED A NORMAL APCH AND TOUCH AND GO. A FEW MINS LATER, OVER THE RADIO, A PLANE BEGAN COMPLAINING OF ANOTHER PLANE THAT HAD CUT HIM OFF IN THE TFC PATTERN, AT MCKINNEY, AND THREATENING TO RPT HIM TO THE FAA. MY STUDENT AND I LISTENED, NOT THINKING THAT HE WAS REFERRING TO OR ACCUSING US. WE HAD BEEN FOLLOWING ANOTHER SMA A AND THE PLANE THAT WAS DOING THE COMPLAINING WAS AN SMA B. A FEW MINS LATER, THE SMA B CALLED US UP AND ASKED US FOR OUR FULL CALL SIGN, AS WE WERE MAKING OUR RADIO CALLS USING AN ABBREVIATED CALL SIGN. THAT WAS OUR FIRST INDICATION THAT HE WAS TALKING ABOUT US.

Data retrieved from NASA's ASRS site as of July 2007 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.