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B737 flight crew reported encountering wake turbulence on approach to sfo 6 miles in trail of a B777 that resulted in a 60 degree bank.
| Attributes | |
| ACN | 1468587 |
| Time | |
| Date | 201707 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Total 11376 Flight Crew Type 5700 |
| Person 2 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 3330 |
| Events | |
| Anomaly | Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
We were following a B777. We were in visual contact; however sfo is now requiring vectors to ILS during night time hours. Downwind we encountered some wake turbulence and advised ATC. On base leg we encountered stronger wake turbulence that put the aircraft into a greater than 30 degree left bank; generating 'attitude' alert. The first officer was pilot flying and disconnected the autopilot and recovered. We advised ATC and they said that we were 6 miles in trail of the B777. They gave us vectors to have greater spacing. No further encounters.
Original NASA ASRS Text
Title: B737 flight crew reported encountering wake turbulence on approach to SFO 6 miles in trail of a B777 that resulted in a 60 degree bank.
Narrative: We were following a B777. We were in visual contact; however SFO is now requiring vectors to ILS during night time hours. Downwind we encountered some wake turbulence and advised ATC. On base leg we encountered stronger wake turbulence that put the aircraft into a greater than 30 degree left bank; generating 'Attitude' alert. The FO was pilot flying and disconnected the autopilot and recovered. We advised ATC and they said that we were 6 miles in trail of the B777. They gave us vectors to have greater spacing. No further encounters.
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.