An air carrier crew on a den runway 16L visual approach with reported traffic in sight; ignored the ...

Attributes
ACN	1014279
Time
Date	201206
Local Time Of Day	1201-1800
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
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	Pilot Flying First Officer
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 8500 Flight Crew Type 4500
Events
Anomaly	Aircraft Equipment Problem Less Severe Conflict Airborne Conflict

Narrative:

At 10 miles on a visual approach to runway 16L at den; autopilot off; ILS backup; on profile. Approach control advised of a regional jet joining runway 16R at our right 3 o'clock. The captain and I both had him in sight. Switch to tower at 8 miles; tower again informed us of traffic joining 16R and that the regional jet had us in sight and that he would maintain visual separation. Regional jet joins extended runway center line; we [were] already on centerline for 16L. TCAS goes off 'monitor vertical speed.' I comply. TCAS changes to 'climb climb.' I do not comply as closely spaced parallel approaches are common and both aircraft were in perfect position. Suspect TCAS anomaly.

Original NASA ASRS Text

Title: An air carrier crew on a DEN Runway 16L visual approach with reported traffic in sight; ignored the TCAS warning because false warnings common on closely spaced visual approaches.

Narrative: At 10 miles on a visual approach to Runway 16L at DEN; autopilot OFF; ILS backup; on profile. Approach Control advised of a regional jet joining Runway 16R at our right 3 o'clock. The Captain and I both had him in sight. Switch to Tower at 8 miles; Tower again informed us of traffic joining 16R and that the regional jet had us in sight and that he would maintain visual separation. Regional jet joins extended runway center line; we [were] already on centerline for 16L. TCAS goes off 'monitor vertical speed.' I comply. TCAS changes to 'climb climb.' I do not comply as closely spaced parallel approaches are common and both aircraft were in perfect position. Suspect TCAS anomaly.

Data retrieved from NASA's ASRS site as of July 2013 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 crew on a den runway 16L visual approach with reported traffic in sight; ignored the TCAS warning because false warnings common on closely spaced visual approaches.