Minimum spacing on quiet bridge visual approach to sfo.

Attributes
ACN	443033
Time
Date	199907
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo.airport
State Reference	CA
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : o90.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : zbr other vortac
Flight Phase	descent : approach
Route In Use	approach : instrument precision approach : charted visual arrival other
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : o90.tracon
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : z8l other
Flight Phase	descent : approach
Route In Use	approach : charted visual approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	443033
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other spatial deviation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Airport Airspace Structure Chart Or Publication Company
Primary Problem	Chart Or Publication
Air Traffic Incident	Pilot Deviation
Situations
Airport	design : sfo.airport
Chart	approach : quiet bridge visual

Narrative:

We were given clearance to follow preceding air carrier X B767 for quiet bridge visual to runway 28R and maintain 170 KTS to san mateo bridge. An air carrier Y B777 turns dogleg from the south, and air carrier Y is given clearance for runway 28L to maintain visual on air carrier X, an MD80. Air carrier Y accepted clearance and then proceeds to turn before us for the runway. Due to his early turn he can no longer maintain visual on us but we clearly have him in sight due to his large size and close proximity. We are forced to maneuver to remain aft of air carrier Y wingline. Winds were strong from the northwest (310 degrees/19 KTS) so I decided to proceed on to runway 28R for landing with minimum spacing between aircraft.

Original NASA ASRS Text

Title: MINIMUM SPACING ON QUIET BRIDGE VISUAL APCH TO SFO.

Narrative: WE WERE GIVEN CLRNC TO FOLLOW PRECEDING ACR X B767 FOR QUIET BRIDGE VISUAL TO RWY 28R AND MAINTAIN 170 KTS TO SAN MATEO BRIDGE. AN ACR Y B777 TURNS DOGLEG FROM THE S, AND ACR Y IS GIVEN CLRNC FOR RWY 28L TO MAINTAIN VISUAL ON ACR X, AN MD80. ACR Y ACCEPTED CLRNC AND THEN PROCEEDS TO TURN BEFORE US FOR THE RWY. DUE TO HIS EARLY TURN HE CAN NO LONGER MAINTAIN VISUAL ON US BUT WE CLRLY HAVE HIM IN SIGHT DUE TO HIS LARGE SIZE AND CLOSE PROX. WE ARE FORCED TO MANEUVER TO REMAIN AFT OF ACR Y WINGLINE. WINDS WERE STRONG FROM THE NW (310 DEGS/19 KTS) SO I DECIDED TO PROCEED ON TO RWY 28R FOR LNDG WITH MINIMUM SPACING BTWN ACFT.

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.