Narrative:

Air carrier X at FL250 asked about traffic, 1 O'clock, our altitude. At the same time, I had observed the conflict alert, which made my decision to climb air carrier X to FL260 as the other aircraft, air carrier Y, data block indicated FL250 descending to FL220. This would increase separation (distance about 6-7 mi -- I had put up 'J' ring) and immediately called R11 to advise of my actions. I was told R11 had climbed air carrier Y back to FL260 and turned him south. I told air carrier X to fly heading 020 degrees. He then advised he had to climb to FL265 for TCASII. When the aircraft were separated, I cleared air carrier X on course.

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Original NASA ASRS Text

Title: AN ACR B727 AT FL250 QUESTIONED THE ARTCC RADAR CTLR ABOUT TFC AT HIS ALT. AT THE SAME TIME THE CONFLICT ALERT ACTIVATED AND THE CTLR CLBED THE B727 AND COORD WITH ADJACENT SECTOR WHO WAS WORKING AN ACR B737 DSNDING THROUGH FL250. THE RPTR WAS TOLD THE B737 WAS CLBING BACK TO FL260 AND THE RPTR TURNED HIS ACFT, BUT SEPARATION WAS LOST.

Narrative: ACR X AT FL250 ASKED ABOUT TFC, 1 O'CLOCK, OUR ALT. AT THE SAME TIME, I HAD OBSERVED THE CONFLICT ALERT, WHICH MADE MY DECISION TO CLB ACR X TO FL260 AS THE OTHER ACFT, ACR Y, DATA BLOCK INDICATED FL250 DSNDING TO FL220. THIS WOULD INCREASE SEPARATION (DISTANCE ABOUT 6-7 MI -- I HAD PUT UP 'J' RING) AND IMMEDIATELY CALLED R11 TO ADVISE OF MY ACTIONS. I WAS TOLD R11 HAD CLBED ACR Y BACK TO FL260 AND TURNED HIM S. I TOLD ACR X TO FLY HDG 020 DEGS. HE THEN ADVISED HE HAD TO CLB TO FL265 FOR TCASII. WHEN THE ACFT WERE SEPARATED, I CLRED ACR X ON COURSE.

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.