Narrative:

The controller was working air carrier X, an eastbound departure. The controller turned air carrier X to a 090 degree heading and climbed air carrier X to 6000 ft. The controller then pointed out arrival traffic air carrier Y to air carrier X as 1 O'clock, 4 mi, 7000 ft. Air carrier X reported the traffic in sight. The arrival controller then yelled out that air carrier Y was responding to an RA on his TCASII. The controller then noticed the conflict alert going off with air carrier Y at 6500 ft, immediately followed by 6100 ft. The controller advised air carrier X to maintain visual separation. Air carrier X told the controller he still had air carrier Y in sight and was descending a few hundred ft. The targets then passed. The TCASII aircraft deviation was 1100 ft. Supplemental information from acn 247277: air carrier Y advised he was descending in response to an RA. I told him there was no traffic above him, everything was below him. When I observed his altitude was 6500 ft, I told him to level off, but he continued descending. There was traffic below him at 6000 ft.

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Original NASA ASRS Text

Title: ACR Y TCASII RA UNAUTH DSCNT NON ADHERENCE TO ATC CLRNC HAD LTSS FROM ACR X EVASIVE ACTION TAKEN.

Narrative: THE CTLR WAS WORKING ACR X, AN EBOUND DEP. THE CTLR TURNED ACR X TO A 090 DEG HDG AND CLBED ACR X TO 6000 FT. THE CTLR THEN POINTED OUT ARR TFC ACR Y TO ACR X AS 1 O'CLOCK, 4 MI, 7000 FT. ACR X RPTED THE TFC IN SIGHT. THE ARR CTLR THEN YELLED OUT THAT ACR Y WAS RESPONDING TO AN RA ON HIS TCASII. THE CTLR THEN NOTICED THE CONFLICT ALERT GOING OFF WITH ACR Y AT 6500 FT, IMMEDIATELY FOLLOWED BY 6100 FT. THE CTLR ADVISED ACR X TO MAINTAIN VISUAL SEPARATION. ACR X TOLD THE CTLR HE STILL HAD ACR Y IN SIGHT AND WAS DSNDING A FEW HUNDRED FT. THE TARGETS THEN PASSED. THE TCASII ACFT DEV WAS 1100 FT. SUPPLEMENTAL INFO FROM ACN 247277: ACR Y ADVISED HE WAS DSNDING IN RESPONSE TO AN RA. I TOLD HIM THERE WAS NO TFC ABOVE HIM, EVERYTHING WAS BELOW HIM. WHEN I OBSERVED HIS ALT WAS 6500 FT, I TOLD HIM TO LEVEL OFF, BUT HE CONTINUED DSNDING. THERE WAS TFC BELOW HIM AT 6000 FT.

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.