An air carrier B737-300 on final approach was cleared to maintain visual on parallel traffic, but reporter had to pass other aircraft and unable to maintain visual. Tower ordered a go around.

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Attributes
ACN	378130
Time
Date	199708
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 1000 msl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sfo
Operator	common carrier : air carrier
Make Model Name	B737-300
Navigation In Use	Other Other
Flight Phase	descent : approach landing : go around
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Make Model Name	B767 Undifferentiated or Other Model
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 3000
ASRS Report	378130
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : clearance other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

We were on tiptoe runway 28L sfo approach, told to maintain visual separation with a B767, 1 O'clock, 3 mi. Told ATC (bay) that we would not be able to stay behind the B767. Bay said no problem 'it looks like it's going to work.' called sfo tower and told them unable to continue to maintain visual separation. They asked B767 if they had us in sight -- they did. Tower still issued us a go around. No more passing for me. Next time, it's ATC's problem.

Original NASA ASRS Text

Title: AN ACR B737-300 ON FINAL APCH WAS CLRED TO MAINTAIN VISUAL ON PARALLEL TFC, BUT RPTR HAD TO PASS OTHER ACFT AND UNABLE TO MAINTAIN VISUAL. TWR ORDERED A GAR.

Narrative: WE WERE ON TIPTOE RWY 28L SFO APCH, TOLD TO MAINTAIN VISUAL SEPARATION WITH A B767, 1 O'CLOCK, 3 MI. TOLD ATC (BAY) THAT WE WOULD NOT BE ABLE TO STAY BEHIND THE B767. BAY SAID NO PROB 'IT LOOKS LIKE IT'S GOING TO WORK.' CALLED SFO TWR AND TOLD THEM UNABLE TO CONTINUE TO MAINTAIN VISUAL SEPARATION. THEY ASKED B767 IF THEY HAD US IN SIGHT -- THEY DID. TWR STILL ISSUED US A GAR. NO MORE PASSING FOR ME. NEXT TIME, IT'S ATC'S PROB.

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.