Air carrier on visual approach to runway 28R at sfo received TCAS RA with commuter traffic on runway...

Narrative:

After being cleared for the visual approach runway 28R at sfo were given traffic at 9 o'clock going to the left runway. We advised traffic in sight as did they. They were maintaining visual on us. We were on glideslope and on localizer when I noticed the commuter aircraft appeared to be going underneath us. Checking TCAS it showed him below us as we were descending. I was going to tell tower when the TCAS gave a traffic alert which quickly changed to an RA. At this point we executed an RA go around and informed tower of such. Tower said the other aircraft had us in sight. I informed him that we felt he was below us and with the RA were going around. We completed the go around and landed uneventfully.

Original NASA ASRS Text

Title: Air carrier on visual approach to Runway 28R at SFO received TCAS RA with commuter traffic on Runway 28L and executed go around; both aircraft were maintaining visual separation with one another.

Narrative: After being cleared for the visual approach Runway 28R at SFO were given traffic at 9 o'clock going to the left runway. We advised traffic in sight as did they. They were maintaining visual on us. We were on glideslope and on localizer when I noticed the commuter aircraft appeared to be going underneath us. Checking TCAS it showed him below us as we were descending. I was going to tell Tower when the TCAS gave a traffic alert which quickly changed to an RA. At this point we executed an RA go around and informed Tower of such. Tower said the other aircraft had us in sight. I informed him that we felt he was below us and with the RA were going around. We completed the go around and landed uneventfully.

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.

Attributes
ACN	858265
Time
Date	200910
Local Time Of Day	1801-2400
Place
Locale Reference	SFO.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Events
Anomaly	Conflict Airborne Conflict

Air carrier on visual approach to runway 28R at sfo received TCAS RA with commuter traffic on runway 28L and executed go around; both aircraft were maintaining visual separation with one another.