An air carrier captain reported a pop up TCAS RA on a 5 NM final to den runway 16 at about 2;000 fee...

Attributes
ACN	1184301
Time
Date	201406
Local Time Of Day	1801-2400
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Airbus Industrie Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Component
Aircraft Component	Traffic Collision Avoidance System (TCAS)
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 245 Flight Crew Total 16000 Flight Crew Type 3100
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 0 Vertical 100

Narrative:

Maneuvering for landing for visual approach at den just outside of the fap got a pop up TCAS climb command. Threat aircraft showed 100 feet below us basically superimposed on our position. There were no previous traffic alerts. We went from maneuvering for a normal approach and landing to a 'climb climb' command. The green fly to arc was very small and at the top of the vvi and was commanding 3;200 feet per min. We executed the escape maneuver and went around. We informed the tower that we were executing a TCAS climb. ATC said they were unaware of any aircraft in our vicinity however the purser informed us after landing that he saw an aircraft out the window. Subsequent vectors for the next approach were uneventful.

Original NASA ASRS Text

Title: An air carrier Captain reported a pop up TCAS RA on a 5 NM final to DEN Runway 16 at about 2;000 feet and executed the escape maneuver and go-around. ATC reported no traffic at that location.

Narrative: Maneuvering for landing for visual approach at DEN just outside of the FAP got a pop up TCAS Climb command. Threat aircraft showed 100 feet below us basically superimposed on our position. There were no previous traffic alerts. We went from maneuvering for a normal approach and landing to a 'Climb Climb' command. The green fly to arc was very small and at the top of the VVI and was commanding 3;200 feet per min. We executed the escape maneuver and went around. We informed the Tower that we were executing a TCAS climb. ATC said they were unaware of any aircraft in our vicinity however the Purser informed us after landing that he saw an aircraft out the window. Subsequent vectors for the next approach were uneventful.

Data retrieved from NASA's ASRS site 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 captain reported a pop up TCAS RA on a 5 NM final to den runway 16 at about 2;000 feet and executed the escape maneuver and go-around. ATC reported no traffic at that location.