Air carrier medium large transport and air carrier widebody transport, on visual approachs to parallel runways come in close proximity requiring evasive action by air carrier medium large transport.

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Attributes
ACN	94171
Time
Date	198809
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : oak
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10700
ASRS Report	94171
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	unspecified : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared for a visual approach and told to maintain 180 KTS. I configured flaps to 5 position and landing gear down. At about 5 mi and 2000' MSL, my first officer said, 'what's that,' as he looked past me out my left window. I saw widebody transport Y to my left, same altitude about 100' away on a parallel course, yet closing on my position. I applied power, climbed and turned slightly right and kept him in sight as he passed below and slightly aft of my left wing. He corrected back left and we both flew our simultaneous approach to lndgs on 28L and 28R, respectively. Medium large transport Y had been told to keep me in sight and it appeared he failed to do so and maneuvered into my airspace.

Original NASA ASRS Text

Title: ACR MLG AND ACR WDB, ON VISUAL APCHS TO PARALLEL RWYS COME IN CLOSE PROX REQUIRING EVASIVE ACTION BY ACR MLG.

Narrative: WE WERE CLRED FOR A VISUAL APCH AND TOLD TO MAINTAIN 180 KTS. I CONFIGURED FLAPS TO 5 POS AND LNDG GEAR DOWN. AT ABOUT 5 MI AND 2000' MSL, MY FO SAID, 'WHAT'S THAT,' AS HE LOOKED PAST ME OUT MY LEFT WINDOW. I SAW WDB Y TO MY LEFT, SAME ALT ABOUT 100' AWAY ON A PARALLEL COURSE, YET CLOSING ON MY POS. I APPLIED POWER, CLBED AND TURNED SLIGHTLY RIGHT AND KEPT HIM IN SIGHT AS HE PASSED BELOW AND SLIGHTLY AFT OF MY LEFT WING. HE CORRECTED BACK LEFT AND WE BOTH FLEW OUR SIMULTANEOUS APCH TO LNDGS ON 28L AND 28R, RESPECTIVELY. MLG Y HAD BEEN TOLD TO KEEP ME IN SIGHT AND IT APPEARED HE FAILED TO DO SO AND MANEUVERED INTO MY AIRSPACE.

Data retrieved from NASA's ASRS site as of August 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.