Narrative:

While climbing on mia 5 departure (winco transition) to 8000 ft, received revised clearance to stop climb at 6000 ft. Upon doing so, mia departure told an air carrier B757 on descent to fll to stop descent at 7000 ft. For an unknown reason the air carrier passed through 7000 ft and was approximately 2 NM in front of our aircraft and descending into us. TCASII ordered an RA of descent of at least 4000 FPM and I also sharply turned right off the SID. The B757 was visually sighted off my left, still descending and making a right turn also. I leveled off at approximately 4200 ft MSL on a 90 degree heading, instead of the 322 degree heading of the transition. ATC was contacted and advised of the RA conflict and I returned to the departure SID. I contacted ATC in mia after the flight and spoke with a supervisor who informed me that the B757, for an unknown reason, continued descent through his assigned 7000 ft and even said that he had us in sight. Also, a separate approach controller was talking to the B757 initially and was not coordinating with my controller until the last min. At this point, it was too late and evasive action was taken. No passenger or flight attendants were injured and the flight continued as normal.

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Original NASA ASRS Text

Title: AN SF3 CAPT DESCRIBED AN RA HE HAD WITH A B757, BEING CTLED BY ANOTHER SECTOR, THAT DID NOT STOP AT ITS ASSIGNED ALT.

Narrative: WHILE CLBING ON MIA 5 DEP (WINCO TRANSITION) TO 8000 FT, RECEIVED REVISED CLRNC TO STOP CLB AT 6000 FT. UPON DOING SO, MIA DEP TOLD AN ACR B757 ON DSCNT TO FLL TO STOP DSCNT AT 7000 FT. FOR AN UNKNOWN REASON THE ACR PASSED THROUGH 7000 FT AND WAS APPROX 2 NM IN FRONT OF OUR ACFT AND DSNDING INTO US. TCASII ORDERED AN RA OF DSCNT OF AT LEAST 4000 FPM AND I ALSO SHARPLY TURNED R OFF THE SID. THE B757 WAS VISUALLY SIGHTED OFF MY L, STILL DSNDING AND MAKING A R TURN ALSO. I LEVELED OFF AT APPROX 4200 FT MSL ON A 90 DEG HDG, INSTEAD OF THE 322 DEG HDG OF THE TRANSITION. ATC WAS CONTACTED AND ADVISED OF THE RA CONFLICT AND I RETURNED TO THE DEP SID. I CONTACTED ATC IN MIA AFTER THE FLT AND SPOKE WITH A SUPVR WHO INFORMED ME THAT THE B757, FOR AN UNKNOWN REASON, CONTINUED DSCNT THROUGH HIS ASSIGNED 7000 FT AND EVEN SAID THAT HE HAD US IN SIGHT. ALSO, A SEPARATE APCH CTLR WAS TALKING TO THE B757 INITIALLY AND WAS NOT COORDINATING WITH MY CTLR UNTIL THE LAST MIN. AT THIS POINT, IT WAS TOO LATE AND EVASIVE ACTION WAS TAKEN. NO PAX OR FLT ATTENDANTS WERE INJURED AND THE FLT CONTINUED AS NORMAL.

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.