An air carrier on the sfo 28R localizer took evasive action and executed a go around after another a...

Attributes
ACN	1232532
Time
Date	201501
Local Time Of Day	1801-2400
Place
Locale Reference	SFO.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 23500 Flight Crew Type 4000
Events
Anomaly	Conflict NMAC Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance
Miss Distance	Horizontal 0 Vertical 400

Narrative:

While descending to 2500 feet on the localizer to rwy 28R (with a good ident); we were told of parallel rj traffic for 28L and they had us in sight. We got visual on them as well even though visibility was about 3 miles and the runways not in sight. As we continued the approach; the rj slowly moved toward us and flew directly over us but was about 400 feet above us. It looked like they were also flying the 28R localizer. We asked the controller to clarify our runway and their runway assignment and they sounded confused but started to move back toward 28L. Since they were on top of us we couldn't go around. So as I decided to break off the approach (hand fly) and turn right because I could see that they were descending on top of us; we got a descend RA. I complied with the RA while the captain (pm) informed the controller. Now we were way right of localizer and low so once we were out from under the rj we performed a go around. We were given vectors around for an uneventful ILS 28L.

Original NASA ASRS Text

Title: An air carrier on the SFO 28R localizer took evasive action and executed a go around after another air carrier on the 28L localizer drifted 400 feet over them with no ATC intervention.

Narrative: While descending to 2500 feet on the localizer to Rwy 28R (with a good ident); we were told of parallel RJ traffic for 28L and they had us in sight. We got visual on them as well even though visibility was about 3 miles and the runways not in sight. As we continued the approach; the RJ slowly moved toward us and flew directly over us but was about 400 feet above us. It looked like they were also flying the 28R localizer. We asked the Controller to clarify our runway and their runway assignment and they sounded confused but started to move back toward 28L. Since they were on top of us we couldn't go around. So as I decided to break off the approach (hand fly) and turn right because I could see that they were descending on top of us; we got a descend RA. I complied with the RA while the Captain (PM) informed the Controller. Now we were way right of localizer and low so once we were out from under the RJ we performed a go around. We were given vectors around for an uneventful ILS 28L.

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 on the sfo 28R localizer took evasive action and executed a go around after another air carrier on the 28L localizer drifted 400 feet over them with no ATC intervention.