Narrative:

The basic overview is that we felt the approach controller did not recognize a traffic conflict that we observed on our TCASII. We were approximately 20 mi south of roc inbound descending through 12000 with a clearance to 6000. ATC pointed out traffic at 12 O'clock and 10 mi swbound (we were nebound). We noticed him on TCASII at about the same time. We told ATC we were IMC. We then questioned ATC about the wisdom of continuing our descent. He said we would clear the traffic. As we came about 6 mi from the traffic I leveled off at 10500 and advised ATC that we had leveled at 10500. We then requested 11000 and were denied. We then requested a heading change and were assigned a 40 degree right turn to 090 and shortly thereafter we were assigned 11000. As we were in the turn to 090, we missed the other aircraft (according to our TCASII) by 1 mi and 500 ft. From there on, our separation increased. At no time did we receive a TA or RA from TCASII. We feel the problem is an ATC controller cutting the separations too close for the situation (roc with very little traffic). It also brings to light that I can't totally trust a controller with TCASII telling me otherwise and what do we do when this happens at ord or atl?

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Original NASA ASRS Text

Title: TCASII SHOWED TFC. FLC REQUESTED TURN TO AVOID. GRANTED AND CLB BACK TO 11000. TFC PASSED 500 FT AND 1 MI.

Narrative: THE BASIC OVERVIEW IS THAT WE FELT THE APCH CTLR DID NOT RECOGNIZE A TFC CONFLICT THAT WE OBSERVED ON OUR TCASII. WE WERE APPROX 20 MI S OF ROC INBOUND DSNDING THROUGH 12000 WITH A CLRNC TO 6000. ATC POINTED OUT TFC AT 12 O'CLOCK AND 10 MI SWBOUND (WE WERE NEBOUND). WE NOTICED HIM ON TCASII AT ABOUT THE SAME TIME. WE TOLD ATC WE WERE IMC. WE THEN QUESTIONED ATC ABOUT THE WISDOM OF CONTINUING OUR DSCNT. HE SAID WE WOULD CLR THE TFC. AS WE CAME ABOUT 6 MI FROM THE TFC I LEVELED OFF AT 10500 AND ADVISED ATC THAT WE HAD LEVELED AT 10500. WE THEN REQUESTED 11000 AND WERE DENIED. WE THEN REQUESTED A HDG CHANGE AND WERE ASSIGNED A 40 DEG R TURN TO 090 AND SHORTLY THEREAFTER WE WERE ASSIGNED 11000. AS WE WERE IN THE TURN TO 090, WE MISSED THE OTHER ACFT (ACCORDING TO OUR TCASII) BY 1 MI AND 500 FT. FROM THERE ON, OUR SEPARATION INCREASED. AT NO TIME DID WE RECEIVE A TA OR RA FROM TCASII. WE FEEL THE PROBLEM IS AN ATC CTLR CUTTING THE SEPARATIONS TOO CLOSE FOR THE SITUATION (ROC WITH VERY LITTLE TFC). IT ALSO BRINGS TO LIGHT THAT I CAN'T TOTALLY TRUST A CTLR WITH TCASII TELLING ME OTHERWISE AND WHAT DO WE DO WHEN THIS HAPPENS AT ORD OR ATL?

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.