Do-328 had a TCASII RA at den.

Attributes
ACN	518800
Time
Date	200107
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : den.airport
State Reference	CO
Altitude	msl single value : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Do 328 TP (Turboprop)
Flight Phase	descent : approach
Route In Use	approach : visual arrival : vfr
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : den.tower
Operator	common carrier : air taxi
Make Model Name	Beech 1900
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain observation : company check pilot oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 3724 flight time type : 457
ASRS Report	518800
Events
Anomaly	conflict : airborne critical non adherence : required legal separation other anomaly other other spatial deviation
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Airport Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

We wre cleared for a visual approach behind an airbus on runway 35R at den airport. As we called the airbus in sight, we began a right base leg for runway 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 situation and what airplane we thought we saw. Then came a TCASII advisory for 'traffic.' this was then immediately followed by a TCASII RA to 'reduce vertical descent.' being unsure of the whereabouts of the airbus, I not only followed the RA instructions, but I also leveled the aircraft and just continued on a base leg until everything was sorted out. As we got the RA traffic in sight, it was a be-1900 on final for runway 35L. At this time, due to continuing the base leg to get the traffic matter taken care of, we had badly overshot runway 35R. I immediately corrected and we told den tower that we had a TCASII RA that we needed to take care of and now were continuing on final for runway 35R. They called traffic at 11 O'clock position and 1 mi. We told them we had the traffic in sight and then we were cleared to land. We landed uneventfully and no more was said. I think a couple of items were linked to the situation that occurred. First, our 'un-assurance' of having the correct airplane in sight as we were cleared for the visual approach to runway 35R, and second I believe that the be-1900 had originally overshot runway 35L which in turn caused the RA. These factors led to the overshooting, ourselves, to runway 35R and caused for confusion throughout the visual approach.

Original NASA ASRS Text

Title: 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.

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.