Narrative:

Air carrier X climbing through approximately 11500 ft with clearance to 13000 ft at approximately 2500 FPM. TCASII issued TA for traffic Y at 12 O'clock high and slightly above immediately followed by an RA to descend rapidly. TCASII RA complied with, descended to about 10500 ft. TCASII announced clear of conflict and climb resumed. Advised ATC during evasive maneuver and they acknowledged traffic at 11700 ft. Resumed climb after clear.

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Original NASA ASRS Text

Title: ACR X TCASII TA RA HAD NMAC WITH VFR ACFT. EVASIVE ACTION DSND. SEE AND AVOID CONCEPT.

Narrative: ACR X CLBING THROUGH APPROX 11500 FT WITH CLRNC TO 13000 FT AT APPROX 2500 FPM. TCASII ISSUED TA FOR TFC Y AT 12 O'CLOCK HIGH AND SLIGHTLY ABOVE IMMEDIATELY FOLLOWED BY AN RA TO DSND RAPIDLY. TCASII RA COMPLIED WITH, DSNDED TO ABOUT 10500 FT. TCASII ANNOUNCED CLR OF CONFLICT AND CLB RESUMED. ADVISED ATC DURING EVASIVE MANEUVER AND THEY ACKNOWLEDGED TFC AT 11700 FT. RESUMED CLB AFTER CLR.

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.