Narrative:

Air carrier X psp to tus at FL330, being worked by an ultra high altitude sector controller (FL330-600) was descended to FL240 west/O a handoff or pointout to the underlying high altitude sector (FL240-310). At XX52Z minimum radar sep was lost between air carrier X and air carrier Y atl to san at FL310. The closest proximity between aircraft was 1000' and 3.7 mi.

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Original NASA ASRS Text

Title: ACR WAS ISSUED A DESCENT THROUGH THE ALT OF ANOTHER ACFT.

Narrative: ACR X PSP TO TUS AT FL330, BEING WORKED BY AN ULTRA HIGH ALT SECTOR CTLR (FL330-600) WAS DSNDED TO FL240 W/O A HDOF OR POINTOUT TO THE UNDERLYING HIGH ALT SECTOR (FL240-310). AT XX52Z MINIMUM RADAR SEP WAS LOST BTWN ACR X AND ACR Y ATL TO SAN AT FL310. THE CLOSEST PROX BTWN ACFT WAS 1000' AND 3.7 MI.

Data retrieved from NASA's ASRS site as of August 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.