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Air carrier widebody transport had to take a minor track deviation to keep visual separation from an large transport turning in front of the widebody transport.
| Attributes | |
| ACN | 181042 |
| Time | |
| Date | 199106 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 5000 |
| ASRS Report | 181042 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On approach for runway 28R (095 degree right, 'quiet bridge') we had to turn left and pull up slightly and slow down to avoid near mid air collision with an air carrier Y large transport on extended right base turn in front of us also for runway 28R. Nearest to large transport was about 1/2 mi at 12 O'clock and we were about 500' above him. Approach control cleared us for visibility to runway 28L after we confirmed visibility contact with large transport. Large transport turned wide and was south of runway 28L centerline before lining up with runway 28R.
Original NASA ASRS Text
Title: ACR WDB HAD TO TAKE A MINOR TRACK DEVIATION TO KEEP VISUAL SEPARATION FROM AN LGT TURNING IN FRONT OF THE WDB.
Narrative: ON APCH FOR RWY 28R (095 DEG R, 'QUIET BRIDGE') WE HAD TO TURN L AND PULL UP SLIGHTLY AND SLOW DOWN TO AVOID NEAR MID AIR COLLISION WITH AN ACR Y LGT ON EXTENDED R BASE TURN IN FRONT OF US ALSO FOR RWY 28R. NEAREST TO LGT WAS ABOUT 1/2 MI AT 12 O'CLOCK AND WE WERE ABOUT 500' ABOVE HIM. APCH CTL CLRED US FOR VIS TO RWY 28L AFTER WE CONFIRMED VIS CONTACT WITH LGT. LGT TURNED WIDE AND WAS S OF RWY 28L CTRLINE BEFORE LINING UP WITH RWY 28R.
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.