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B737NG captain reported encountering wake turbulence descending through FL320 12 miles in trail of a B777 on the dyamd arrival into sfo.
| Attributes | |
| ACN | 1653994 |
| Time | |
| Date | 201906 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZOA.ARTCC |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 212.35 Flight Crew Type 2341.78 |
| Events | |
| Anomaly | Ground Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
FL320; calm skies; slight 20 knot headwind on arrival. Autopilot on; aircraft rolled to approx 25 degrees bank and autopilot kicked off. First officer was hand flying and recovered to wings level. Seatbelt sign turned on and announcement made for everyone to take their seats. ATC notified and queried about what aircraft we were following. B777 aircraft was approximately 12 miles ahead. We asked to offset and a 1 mile left offset was given. We flew that offset on the arrival until wind conditions shifted at which time we removed the offset. No pax or crew injuries were reported.
Original NASA ASRS Text
Title: B737NG Captain reported encountering wake turbulence descending through FL320 12 miles in trail of a B777 on the DYAMD arrival into SFO.
Narrative: FL320; calm skies; slight 20 knot headwind on arrival. Autopilot on; aircraft rolled to approx 25 degrees bank and autopilot kicked off. First Officer was hand flying and recovered to wings level. Seatbelt sign turned on and announcement made for everyone to take their seats. ATC notified and queried about what aircraft we were following. B777 aircraft was approximately 12 miles ahead. We asked to offset and a 1 mile left offset was given. We flew that offset on the arrival until wind conditions shifted at which time we removed the offset. No pax or crew injuries were reported.
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.