B737-400
Flight Crew Air Transport Pilot (ATP)
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew FLC complied w / Automation / Advisory
Environment - Non Weather Related
[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.
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.