An air carrier jet on a long final for den runway 16R experienced a TCAS RA with traffic assigned to...

Attributes
ACN	956763
Time
Date	201106
Local Time Of Day	1201-1800
Place
Locale Reference	DEN.Tower
State Reference	CO
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 22800 Flight Crew Type 11400
Events
Anomaly	Conflict Airborne Conflict Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

Established on the ILS approximately 13 miles out we reported the runway in sight and were cleared for the visual approach. We were advised there was traffic to the east joining the ILS to 16L. We reported the traffic in sight and continued the visual with the ILS backup to 16R. As the traffic for 16L began to turn to the final; we got a TCAS RA descend. When we looked over for visual confirmation we were surprised to see our traffic no longer turning to intercept 16L; but now turning straight toward us. In responding to the RA; we managed to descend below the traffic as he passed above us and out of sight. Thinking that the other traffic was merely close; I delayed responding to the RA till I had visual confirmation. Traffic passed closer than we'd have liked and we are still not sure of what he was doing.

Original NASA ASRS Text

Title: An air carrier jet on a long final for DEN Runway 16R experienced a TCAS RA with traffic assigned to intercept the 16L final approach course. The traffic had not intercepted the final to the left and flew through the localizer for the right runway.

Narrative: Established on the ILS approximately 13 miles out we reported the runway in sight and were cleared for the visual approach. We were advised there was traffic to the east joining the ILS to 16L. We reported the traffic in sight and continued the visual with the ILS backup to 16R. As the traffic for 16L began to turn to the final; we got a TCAS RA descend. When we looked over for visual confirmation we were surprised to see our traffic no longer turning to intercept 16L; but now turning straight toward us. In responding to the RA; we managed to descend below the traffic as he passed above us and out of sight. Thinking that the other traffic was merely close; I delayed responding to the RA till I had visual confirmation. Traffic passed closer than we'd have liked and we are still not sure of what he was doing.

Data retrieved from NASA's ASRS site as of April 2012 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.

An air carrier jet on a long final for den runway 16R experienced a TCAS RA with traffic assigned to intercept the 16L final approach course. The traffic had not intercepted the final to the left and flew through the localizer for the right runway.