Narrative:

We (aircraft X) had just begun a scheduled far part 121 flight from pbi to rdu. We were approximately 40 mi northeast of pbi and had been cleared to maintain 15000 ft. As we passed 14000 ft for 15000 ft, I heard mia instruct a B757 (aircraft Y) to maintain 16000 ft and center called out traffic as a fokker F100 to level at 15000 ft (us). Immediately after talking to aircraft, ZMA called them out to us as a B757 to level at 16000 ft. I don't recall the distance callout, but the relative position to us was stated as 10 O'clock. I picked up the traffic and acknowledged contact with ZMA. Upon acknowledging we had traffic, ZMA instructed us to maintain visual contact with the B757 and that the B757 would be cleared to descend through our altitude. I acknowledged with a call sign as I was sizing up the situation. I don't believe air carrier ever acknowledged us in sight. Here's the situation. We were on a converging course with air carrier and we were actually in the leveloff at 15000 ft. Air carrier was cleared to descend through our altitude to what I found out from center was 7000 ft (their cleared to altitude). When I acknowledged having traffic, I did not expect center to clear them through our altitude -- it just wasn't going to work. Immediately after I acknowledged with our call sign to maintain visual separation, I queried center as to air carrier clearance altitude. About this time we received an RA to 'reduce climb.' we were around 14400 fr for 15000 ft. About this time air carrier informed ZMA they would level off until past us. We then received a 'monitor vertical speed' at which time the first officer (who was fling) descended to just above 14000 ft. This whole scenario played out in approximately 30-45 seconds. It was a bad clearance issued by center as we had nowhere to go without deviating from our assigned clearance. We couldn't climb without busting our assigned altitude. We couldn't turn behind or ahead of air carrier as we didn't know what he was going to do. And, we couldn't really descend -- we were stuck. I would imagine air carrier received an RA also. Lesson: never call out traffic -- it can bite you!

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Original NASA ASRS Text

Title: F100 PIC INITIATES EVASIVE TCASII MANEUVER AS CTLR ISSUES VISUAL SEPARATION, DSCNT CLRNC TO B757.

Narrative: WE (ACFT X) HAD JUST BEGUN A SCHEDULED FAR PART 121 FLT FROM PBI TO RDU. WE WERE APPROX 40 MI NE OF PBI AND HAD BEEN CLRED TO MAINTAIN 15000 FT. AS WE PASSED 14000 FT FOR 15000 FT, I HEARD MIA INSTRUCT A B757 (ACFT Y) TO MAINTAIN 16000 FT AND CTR CALLED OUT TFC AS A FOKKER F100 TO LEVEL AT 15000 FT (US). IMMEDIATELY AFTER TALKING TO ACFT, ZMA CALLED THEM OUT TO US AS A B757 TO LEVEL AT 16000 FT. I DON'T RECALL THE DISTANCE CALLOUT, BUT THE RELATIVE POS TO US WAS STATED AS 10 O'CLOCK. I PICKED UP THE TFC AND ACKNOWLEDGED CONTACT WITH ZMA. UPON ACKNOWLEDGING WE HAD TFC, ZMA INSTRUCTED US TO MAINTAIN VISUAL CONTACT WITH THE B757 AND THAT THE B757 WOULD BE CLRED TO DSND THROUGH OUR ALT. I ACKNOWLEDGED WITH A CALL SIGN AS I WAS SIZING UP THE SIT. I DON'T BELIEVE ACR EVER ACKNOWLEDGED US IN SIGHT. HERE'S THE SIT. WE WERE ON A CONVERGING COURSE WITH ACR AND WE WERE ACTUALLY IN THE LEVELOFF AT 15000 FT. ACR WAS CLRED TO DSND THROUGH OUR ALT TO WHAT I FOUND OUT FROM CTR WAS 7000 FT (THEIR CLRED TO ALT). WHEN I ACKNOWLEDGED HAVING TFC, I DID NOT EXPECT CTR TO CLR THEM THROUGH OUR ALT -- IT JUST WASN'T GOING TO WORK. IMMEDIATELY AFTER I ACKNOWLEDGED WITH OUR CALL SIGN TO MAINTAIN VISUAL SEPARATION, I QUERIED CTR AS TO ACR CLRNC ALT. ABOUT THIS TIME WE RECEIVED AN RA TO 'REDUCE CLB.' WE WERE AROUND 14400 FR FOR 15000 FT. ABOUT THIS TIME ACR INFORMED ZMA THEY WOULD LEVEL OFF UNTIL PAST US. WE THEN RECEIVED A 'MONITOR VERT SPD' AT WHICH TIME THE FO (WHO WAS FLING) DSNDED TO JUST ABOVE 14000 FT. THIS WHOLE SCENARIO PLAYED OUT IN APPROX 30-45 SECONDS. IT WAS A BAD CLRNC ISSUED BY CTR AS WE HAD NOWHERE TO GO WITHOUT DEVIATING FROM OUR ASSIGNED CLRNC. WE COULDN'T CLB WITHOUT BUSTING OUR ASSIGNED ALT. WE COULDN'T TURN BEHIND OR AHEAD OF ACR AS WE DIDN'T KNOW WHAT HE WAS GOING TO DO. AND, WE COULDN'T REALLY DSND -- WE WERE STUCK. I WOULD IMAGINE ACR RECEIVED AN RA ALSO. LESSON: NEVER CALL OUT TFC -- IT CAN BITE YOU!

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.