B757 flight crew executed a missed approach after getting a TCASII RA on final approach at sfo.

Attributes
ACN	441092
Time
Date	199906
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo.airport
State Reference	CA
Altitude	msl single value : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sfo.tower
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 28r
Route In Use	approach other arrival other
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : sfo.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	441092
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne critical non adherence : required legal separation other spatial deviation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action flight crew : executed missed approach flight crew : took evasive action
Supplementary
Problem Areas	Airport FAA
Primary Problem	FAA
Air Traffic Incident	Operational Error
Situations
ATC Facility	procedure or policy : sfo.tower

Narrative:

Sfo pass on final, causes TCASII RA. While executing FMS qball approach and speed restr, controller kept getting me to say I had a B737 at my 8 O'clock position in sight and same him me. They allowed him to close on us to the point I received a TCASII RA, which I followed, which resulted in a missed approach. The verbiage during and after this event indicated the sfo controllers are unaware that I have no legal authority/authorized (nor desire) to assume that a third aircraft has not -- repeat not -- intruded the airspace and disregard the TCASII warning. They are evidently of the belief that if they can get both aircraft to see each other TCASII may be disregarded. If I am in error on the legalities of this type situation, I would appreciate a message back, though I would have to think long and hard about disregard of any TCASII warning. It has saved the bacon for many I know.

Original NASA ASRS Text

Title: B757 FLC EXECUTED A MISSED APCH AFTER GETTING A TCASII RA ON FINAL APCH AT SFO.

Narrative: SFO PASS ON FINAL, CAUSES TCASII RA. WHILE EXECUTING FMS QBALL APCH AND SPD RESTR, CTLR KEPT GETTING ME TO SAY I HAD A B737 AT MY 8 O'CLOCK POS IN SIGHT AND SAME HIM ME. THEY ALLOWED HIM TO CLOSE ON US TO THE POINT I RECEIVED A TCASII RA, WHICH I FOLLOWED, WHICH RESULTED IN A MISSED APCH. THE VERBIAGE DURING AND AFTER THIS EVENT INDICATED THE SFO CTLRS ARE UNAWARE THAT I HAVE NO LEGAL AUTH (NOR DESIRE) TO ASSUME THAT A THIRD ACFT HAS NOT -- REPEAT NOT -- INTRUDED THE AIRSPACE AND DISREGARD THE TCASII WARNING. THEY ARE EVIDENTLY OF THE BELIEF THAT IF THEY CAN GET BOTH ACFT TO SEE EACH OTHER TCASII MAY BE DISREGARDED. IF I AM IN ERROR ON THE LEGALITIES OF THIS TYPE SIT, I WOULD APPRECIATE A MESSAGE BACK, THOUGH I WOULD HAVE TO THINK LONG AND HARD ABOUT DISREGARD OF ANY TCASII WARNING. IT HAS SAVED THE BACON FOR MANY I KNOW.

Data retrieved from NASA's ASRS site as of July 2007 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.