Flight crew of a widebody transport air carrier aircraft took evasive action to avoid another aircraft on final for the other parallel runway due to TCASII RA and judgement of maintaining visual separation.

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Attributes
ACN	244339
Time
Date	199306
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10100 flight time type : 1000
ASRS Report	244339
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : instrument pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Sfo approach was conducting parallel visual approachs to runways 28L and 28R. My (widebody transport aircraft) was vectored to a right base and a right intercept for 28R. An air carrier large transport aircraft was vectored to a straight-in visual 28L approach. We joined together on the approach wingtip to wingtip. My TCASII went crazy with 'traffic! Traffic!, pull up, pull up, etc.' we had to turn it off. I was very uncomfortable with the approach and will not do it again. Possibly, sfo approach should not put large aircraft wingtip to wingtip to 28L and 28R.

Original NASA ASRS Text

Title: FLC OF A WDB ACR ACFT TOOK EVASIVE ACTION TO AVOID ANOTHER ACFT ON FINAL FOR THE OTHER PARALLEL RWY DUE TO TCASII RA AND JUDGEMENT OF MAINTAINING VISUAL SEPARATION.

Narrative: SFO APCH WAS CONDUCTING PARALLEL VISUAL APCHS TO RWYS 28L AND 28R. MY (WDB ACFT) WAS VECTORED TO A R BASE AND A R INTERCEPT FOR 28R. AN ACR LGT ACFT WAS VECTORED TO A STRAIGHT-IN VISUAL 28L APCH. WE JOINED TOGETHER ON THE APCH WINGTIP TO WINGTIP. MY TCASII WENT CRAZY WITH 'TFC! TFC!, PULL UP, PULL UP, ETC.' WE HAD TO TURN IT OFF. I WAS VERY UNCOMFORTABLE WITH THE APCH AND WILL NOT DO IT AGAIN. POSSIBLY, SFO APCH SHOULD NOT PUT LARGE ACFT WINGTIP TO WINGTIP TO 28L AND 28R.

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.