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A320 flight crew on approach to sfo runway 28L elects to go around because of B747; on right base; overshooting turn on for runway 28R.
| Attributes | |
| ACN | 663258 |
| Time | |
| Date | 200504 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sfo.airport |
| State Reference | CA |
| Altitude | msl single value : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : nct.tracon tower : sfo.tower |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : nct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual approach : traffic pattern |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 220 flight time total : 10000 flight time type : 1200 |
| ASRS Report | 663258 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer oversight : pic |
| Experience | flight time last 90 days : 250 flight time total : 6500 flight time type : 550 |
| ASRS Report | 663255 |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued advisory flight crew : declared emergency flight crew : took precautionary avoidance action |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Norcal approach cleared us for a tipp toe visual runway 28L approximately 20 mi from the field. As we proceeded inside menlo and turned to a 310 degree heading; norcal advised us of traffic at our 1 O'clock position. A B747 was on a right base for the visual runway 28R. We made visual contact with the aircraft and were told they would keep us in visual contact throughout their approach. We switched over to tower frequency who then cleared us for the visual runway 28L. At that point; we noticed the B747 drifting into our airspace for runway 28L. We elected to stay at 5000 ft and not descend for the visual. I queried tower once again for clearance. He said the B747 would keep us in sight and cleared us for the approach. At that point; the B747 disappeared underneath our aircraft and was no longer visible. We stayed at 5000 ft and executed a go around. At no time did norcal or sfo tower offer any solution to the situation; ie; vectors; etc; to either aircraft.
Original NASA ASRS Text
Title: A320 FLT CREW ON APCH TO SFO RWY 28L ELECTS TO GO AROUND BECAUSE OF B747; ON R BASE; OVERSHOOTING TURN ON FOR RWY 28R.
Narrative: NORCAL APCH CLRED US FOR A TIPP TOE VISUAL RWY 28L APPROX 20 MI FROM THE FIELD. AS WE PROCEEDED INSIDE MENLO AND TURNED TO A 310 DEG HDG; NORCAL ADVISED US OF TFC AT OUR 1 O'CLOCK POS. A B747 WAS ON A R BASE FOR THE VISUAL RWY 28R. WE MADE VISUAL CONTACT WITH THE ACFT AND WERE TOLD THEY WOULD KEEP US IN VISUAL CONTACT THROUGHOUT THEIR APCH. WE SWITCHED OVER TO TWR FREQ WHO THEN CLRED US FOR THE VISUAL RWY 28L. AT THAT POINT; WE NOTICED THE B747 DRIFTING INTO OUR AIRSPACE FOR RWY 28L. WE ELECTED TO STAY AT 5000 FT AND NOT DSND FOR THE VISUAL. I QUERIED TWR ONCE AGAIN FOR CLRNC. HE SAID THE B747 WOULD KEEP US IN SIGHT AND CLRED US FOR THE APCH. AT THAT POINT; THE B747 DISAPPEARED UNDERNEATH OUR ACFT AND WAS NO LONGER VISIBLE. WE STAYED AT 5000 FT AND EXECUTED A GAR. AT NO TIME DID NORCAL OR SFO TWR OFFER ANY SOLUTION TO THE SIT; IE; VECTORS; ETC; TO EITHER ACFT.
Data retrieved from NASA's ASRS site as of January 2009 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.