Narrative:

While level at FL250 we received a TCASII RA telling us to climb. I started to climb at 1100 FPM. The first officer called ATC to let them know we were climbing. The TCASII gave us the clear of conflict at 25400 ft so we returned to FL250. ATC told us our traffic was level at FL240. We told him again we were responding to a TCASII RA. He said ok and that there was no problem.

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Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION DURING FLC RESPONSE TO A TCASII RA WITH OPPOSITE DIRECTION TFC.

Narrative: WHILE LEVEL AT FL250 WE RECEIVED A TCASII RA TELLING US TO CLB. I STARTED TO CLB AT 1100 FPM. THE FO CALLED ATC TO LET THEM KNOW WE WERE CLBING. THE TCASII GAVE US THE CLR OF CONFLICT AT 25400 FT SO WE RETURNED TO FL250. ATC TOLD US OUR TFC WAS LEVEL AT FL240. WE TOLD HIM AGAIN WE WERE RESPONDING TO A TCASII RA. HE SAID OK AND THAT THERE WAS NO PROB.

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.