DC10 and B757 assigned parallel visual approachs on runway 28L and runway 28R in sfo. DC10 is slightly behind B757, but has a higher minimum approach speed. Spacing is such that DC10 slides slightly ahead of B757. B757 executes a go around at 500 ft.

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Attributes
ACN	401705
Time
Date	199805
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 500 msl bound upper : 500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : sfo
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	landing other
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	landing : go around landing other
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	other other : other pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 8000 flight time type : 1000
ASRS Report	401705
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 100 flight time total : 21000 flight time type : 6000
ASRS Report	402480
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	none taken : anomaly accepted other other
Consequence	Other
Miss Distance	horizontal : 750 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other
Situations
Airport	other physical facility

Narrative:

On an approach to sfo, we were cleared for a visual to runway 28L and a B757 was cleared to runway 28R. ATC asked us to keep visual with the B757 and contact tower, we were both cleared to land and just about side-by-side. On short final, we were slightly in front of the B757 and they asked about whether, since we had a visual and were instructed to keep visual separation, we should be slightly passing them on short final. Bottom line was that they initiated a go around. My concern is, was it our responsibility to not pass them, even though we were not given instructions to not pass? On the charted visual instructions it notes to keep a slight staggered separation. We were not cleared for the charted visual, so do those notes apply? Even though the B757 opted for a go around, there appeared to be nothing unsafe. Callback conversation with reporter revealed the following information: callback confirmed the distraction caused by the wingtip-to-wingtip operation diverted the first officer and so's attention outside. The captain was distraction making sure he did not fly right of the runway 28L localizer. The end result was the crew forgot landing gear extension until well inside the OM. They also missed several altitude callouts and had a delayed checklist.

Original NASA ASRS Text

Title: DC10 AND B757 ASSIGNED PARALLEL VISUAL APCHS ON RWY 28L AND RWY 28R IN SFO. DC10 IS SLIGHTLY BEHIND B757, BUT HAS A HIGHER MINIMUM APCH SPD. SPACING IS SUCH THAT DC10 SLIDES SLIGHTLY AHEAD OF B757. B757 EXECUTES A GAR AT 500 FT.

Narrative: ON AN APCH TO SFO, WE WERE CLRED FOR A VISUAL TO RWY 28L AND A B757 WAS CLRED TO RWY 28R. ATC ASKED US TO KEEP VISUAL WITH THE B757 AND CONTACT TWR, WE WERE BOTH CLRED TO LAND AND JUST ABOUT SIDE-BY-SIDE. ON SHORT FINAL, WE WERE SLIGHTLY IN FRONT OF THE B757 AND THEY ASKED ABOUT WHETHER, SINCE WE HAD A VISUAL AND WERE INSTRUCTED TO KEEP VISUAL SEPARATION, WE SHOULD BE SLIGHTLY PASSING THEM ON SHORT FINAL. BOTTOM LINE WAS THAT THEY INITIATED A GAR. MY CONCERN IS, WAS IT OUR RESPONSIBILITY TO NOT PASS THEM, EVEN THOUGH WE WERE NOT GIVEN INSTRUCTIONS TO NOT PASS? ON THE CHARTED VISUAL INSTRUCTIONS IT NOTES TO KEEP A SLIGHT STAGGERED SEPARATION. WE WERE NOT CLRED FOR THE CHARTED VISUAL, SO DO THOSE NOTES APPLY? EVEN THOUGH THE B757 OPTED FOR A GAR, THERE APPEARED TO BE NOTHING UNSAFE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: CALLBACK CONFIRMED THE DISTR CAUSED BY THE WINGTIP-TO-WINGTIP OP DIVERTED THE FO AND SO'S ATTN OUTSIDE. THE CAPT WAS DISTR MAKING SURE HE DID NOT FLY R OF THE RWY 28L LOC. THE END RESULT WAS THE CREW FORGOT LNDG GEAR EXTENSION UNTIL WELL INSIDE THE OM. THEY ALSO MISSED SEVERAL ALT CALLOUTS AND HAD A DELAYED CHKLIST.

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.