Narrative:

An small aircraft heading 360 degree at 5000' he was told to descend to and maintain 4000'. 3 fgts at 6000' overflew the small aircraft. When clear they were descended to 3000'. The 3 fgts were given left turn for vector to a VFR arrival fix, and were to pass under small aircraft. Radar tags overlapped and the small aircraft descended to 3000' illegally. Aircraft came close but their targets didn't merge.

Google
 

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION OCCURED BETWEEN AN SMA ACFT AND FLT OF 3 FGT ACFT.

Narrative: AN SMA HDG 360 DEG AT 5000' HE WAS TOLD TO DSND TO AND MAINTAIN 4000'. 3 FGTS AT 6000' OVERFLEW THE SMA. WHEN CLR THEY WERE DSNDED TO 3000'. THE 3 FGTS WERE GIVEN L TURN FOR VECTOR TO A VFR ARR FIX, AND WERE TO PASS UNDER SMA. RADAR TAGS OVERLAPPED AND THE SMA DSNDED TO 3000' ILLEGALLY. ACFT CAME CLOSE BUT THEIR TARGETS DIDN'T MERGE.

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.