Narrative:

I was conducting a private pilot flight test in the above small aircraft X, had cleared the area for takeoff, observed none, and given the applicant a mild nose-up, left climbing turn. This is an unusual attitude to recover from, which he did. We had then flown straight and level on a north heading for at least 1/2 min, when a red and white low wing aircraft flashed underneath us, coming from left to right, and judging by the exit angle, he came from about 110 degrees to our right. I believe the aircraft was an small aircraft Y. Area used was the normal FBO practice area below TCA floor of 5000'.

Related reports:

Google
 

Original NASA ASRS Text

Title: CLOSE PROX 2 GA SMA IN FBO TRAINING AREA.

Narrative: I WAS CONDUCTING A PVT PLT FLT TEST IN THE ABOVE SMA X, HAD CLRED THE AREA FOR TKOF, OBSERVED NONE, AND GIVEN THE APPLICANT A MILD NOSE-UP, LEFT CLBING TURN. THIS IS AN UNUSUAL ATTITUDE TO RECOVER FROM, WHICH HE DID. WE HAD THEN FLOWN STRAIGHT AND LEVEL ON A N HDG FOR AT LEAST 1/2 MIN, WHEN A RED AND WHITE LOW WING ACFT FLASHED UNDERNEATH US, COMING FROM LEFT TO RIGHT, AND JUDGING BY THE EXIT ANGLE, HE CAME FROM ABOUT 110 DEGS TO OUR RIGHT. I BELIEVE THE ACFT WAS AN SMA Y. AREA USED WAS THE NORMAL FBO PRACTICE AREA BELOW TCA FLOOR OF 5000'.

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.