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B737-900 flight crew reported encountering wake turbulence on arrival from preceding B777 into sfo; which resulted in a 50 degree right bank.
| Attributes | |
| ACN | 1294612 |
| Time | |
| Date | 201509 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | B737-900 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR BDEGA1 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
ATC cleared us to descend via the BDEGA1 arrival to sfo. Nct approach never issued us a runway to expect. (ATIS advised 28R/28L landings in use) we queried nct as to runway assignment crossing corkk. We immediately programmed runway 28L into FMC and proceeded to brixx. Shortly after passing corkk we encountered significant wake turbulence resulting in instant 50 degree right bank. I disconnected automation and flew the airplane back to straight and level while first officer requested heading of 170 to avoid additional wake. ATC advised a left turn to 110 degrees to avoid departure traffic.wake turbulence.
Original NASA ASRS Text
Title: B737-900 flight crew reported encountering wake turbulence on arrival from preceding B777 into SFO; which resulted in a 50 degree right bank.
Narrative: ATC cleared us to descend via the BDEGA1 arrival to SFO. NCT approach never issued us a runway to expect. (ATIS advised 28R/28L landings in use) We queried NCT as to runway assignment crossing CORKK. We immediately programmed runway 28L into FMC and proceeded to BRIXX. Shortly after passing CORKK we encountered significant wake turbulence resulting in instant 50 degree right bank. I disconnected automation and flew the airplane back to straight and level while FO requested heading of 170 to avoid additional wake. ATC advised a left turn to 110 degrees to avoid departure traffic.Wake turbulence.
Data retrieved from NASA's ASRS site 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.