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B737-400 first officer reported encountering wake vortex after takeoff in trail of a B777 that resulted in a windshear warning. Reporter stated 'inadequate separation' was the cause of the event.
| Attributes | |
| ACN | 1190692 |
| Time | |
| Date | 201407 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
[We were] cleared to takeoff runway 28L following a B777 takeoff. Waited two minutes for roll and passing 600 ft we got a windshear warning. Did not have any speed deviations and warning went away after approximately 3 seconds. [We] initiated windshear memory items. ATIS winds were 290/18. We realized the cause of the warning came from B777 jetwash. Cause: inadequate separation between B777 takeoff and our takeoff clearance.
Original NASA ASRS Text
Title: B737-400 First Officer reported encountering wake vortex after takeoff in trail of a B777 that resulted in a windshear warning. Reporter stated 'inadequate separation' was the cause of the event.
Narrative: [We were] cleared to takeoff Runway 28L following a B777 takeoff. Waited two minutes for roll and passing 600 FT we got a windshear warning. Did not have any speed deviations and warning went away after approximately 3 seconds. [We] initiated windshear memory items. ATIS winds were 290/18. We realized the cause of the warning came from B777 jetwash. Cause: Inadequate separation between B777 takeoff and our takeoff clearance.
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.