B737-700
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 176; Flight Crew Type 8115
Inflight Event / Encounter Unstabilized Approach; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Took Evasive Action; Flight Crew Executed Go Around / Missed Approach
Environment - Non Weather Related; Procedure
ATC sequenced us approximately 1.5-2 miles behind a B747 landing parallel runway; we were landing 28L and the B747 was ahead of us landing 28R. ATC notified us to use caution due to the possibility of wake turbulence. ATIS indicated wind was variable at five knots. The F/O purposely deviated slightly above glideslope (no more than one dot) and was flying an additional five knots above target speed. As we approached approximately 150-200 ft AGL; we started to encounter the wake turbulence from the B747 that had landed ahead of us. The F/O made good corrections but the updraft and lateral displacement put us in an unsafe position to land. We executed a go-around and were vectored back around for an uneventful landing.ATC sequencing us ahead of (or further behind) the B747 would have prevented this event. Because the wind was variable at only five knots; there was a significant potential for the wake turbulence to affect our landing on the parallel runway.
As the Pilot Flying and cleared for a visual approach to 28L we experienced wake from the aircraft ahead which had landed on the parallel runway in front of us. We experienced the wake at approximately 300 ft and both the PM and I came to the same coordinated conclusion that we should discontinue the approach. A normal go-around and approach and landing were completed. Both Tower and Departure were given the reason for the go-around.
B737-700 Captain reported executing a go-around after encountering wake turbulence from a B747 landing on the parallel runway at SFO.