MLG FLC RESPONDS TO TCASII RA. ALTDEV.

Narrative

AFTER LEVELING AT 11000 FT MSL ON THE AQN-2 ARR TO DFW AND HDG NE ON THE AQN 040 DEG RADIAL AT 18 DME; I RECEIVED A TCASII TA. AFTER CHKING THE TCASII DISPLAY; I LOOKED AHEAD TO VISUALLY ACQUIRE THE INTRUDER TARGET. I VISUALLY SIGHTED AN MLG AT MY 11:30 O'CLOCK CLBING TOWARDS MY ACFT. I THEN RECEIVED A TCASII RA WHICH INSTRUCTED ME TO CLB AT 1500 FPM. I COMPLIED WITH THE RA AND CLBED 500 FT ABOVE MY ASSIGNED ALT WHEN THE TCASII ISSUED THE CLR OF CONFLICT AURAL. DURING THE CLB; I NOTIFIED ATC THAT I WAS LEAVING MY ASSIGNED ALT TO COMPLY WITH THE TCASII RA. CTLR ASKED IF WE SAW THE TARGET AHEAD. I STATED THAT I INDEED HAD THE TARGET VISUALLY. CTLR STATED THE TARGET WAS ASSIGNED TO LEVEL AT 10000 FT MSL. HE ALSO ASKED WHY I WAS DEVIATING FROM ASSIGNED ALT SINCE I HAD VISUALLY SIGHTED TARGET. I TOLD HIM THAT MY COMPANY'S POLICY IS TO FOLLOW EVERY RA TO THE LETTER UNLESS THE RA WOULD RESULT IN A DANGER TO THE ACFT. THE CTLR THEN SAID 'WELL; YOU'LL BE HEARING ABOUT THIS ONE. CALL APCH ON (NEXT FREQ).' I BELIEVE THE RA I RECEIVED WAS ISSUED AS A CLASSIC EXAMPLE OF THE 'DFW BUMP' CAUSED BY LARGE CLB AND DSCNT RATES ACFT FLY HERE. CURRENT TCASII SOFTWARE DOESN'T RECOGNIZE THESE RATES AS NORMAL AND ISSUES MANY BOGUS RA'S. HOWEVER; BY LAW; I AM FORCED TO TRUST MY INSTS AND COMPLY WITH ALL RA'S. CTLRS MUST UNDERSTAND THAT A VISUAL SIGHTING DOES NOT RELIEVE ME OF THAT RESPONSIBILITY. A COLLISION CAN JUST AS EASILY OCCUR BTWN VISUAL TARGETS AS THOSE UNSEEN. THE SAFEST ACTION TO TAKE IS TO COMPLY WITH AN RA.