DO-328 HAD A TCASII RA AT DEN.

Narrative

WE WRE CLRED FOR A VISUAL APCH BEHIND AN AIRBUS ON RWY 35R AT DEN ARPT. AS WE CALLED THE AIRBUS IN SIGHT; WE BEGAN A R BASE LEG FOR RWY 35R. AT THAT INSTANT; THE AIRBUS THAT WE THOUGHT WE SAW BEGAN TO LOOK MORE AND MORE LIKE AN MD80. AS A CREW; WE QUERIED EACH OTHER ABOUT THE SIT AND WHAT AIRPLANE WE THOUGHT WE SAW. THEN CAME A TCASII ADVISORY FOR 'TFC.' THIS WAS THEN IMMEDIATELY FOLLOWED BY A TCASII RA TO 'REDUCE VERT DSCNT.' BEING UNSURE OF THE WHEREABOUTS OF THE AIRBUS; I NOT ONLY FOLLOWED THE RA INSTRUCTIONS; BUT I ALSO LEVELED THE ACFT AND JUST CONTINUED ON A BASE LEG UNTIL EVERYTHING WAS SORTED OUT. AS WE GOT THE RA TFC IN SIGHT; IT WAS A BE-1900 ON FINAL FOR RWY 35L. AT THIS TIME; DUE TO CONTINUING THE BASE LEG TO GET THE TFC MATTER TAKEN CARE OF; WE HAD BADLY OVERSHOT RWY 35R. I IMMEDIATELY CORRECTED AND WE TOLD DEN TWR THAT WE HAD A TCASII RA THAT WE NEEDED TO TAKE CARE OF AND NOW WERE CONTINUING ON FINAL FOR RWY 35R. THEY CALLED TFC AT 11 O'CLOCK POS AND 1 MI. WE TOLD THEM WE HAD THE TFC IN SIGHT AND THEN WE WERE CLRED TO LAND. WE LANDED UNEVENTFULLY AND NO MORE WAS SAID. I THINK A COUPLE OF ITEMS WERE LINKED TO THE SIT THAT OCCURRED. FIRST; OUR 'UN-ASSURANCE' OF HAVING THE CORRECT AIRPLANE IN SIGHT AS WE WERE CLRED FOR THE VISUAL APCH TO RWY 35R; AND SECOND I BELIEVE THAT THE BE-1900 HAD ORIGINALLY OVERSHOT RWY 35L WHICH IN TURN CAUSED THE RA. THESE FACTORS LED TO THE OVERSHOOTING; OURSELVES; TO RWY 35R AND CAUSED FOR CONFUSION THROUGHOUT THE VISUAL APCH.