B747-400
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 250; Flight Crew Total 25000; Flight Crew Type 5000
Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Procedure
SFO Tower cleared us to 'line up and wait 28R'; a B747-400 had landed in front of us and was told to hold short of Runway 28L. We were then cleared for take off. Close to V1 we heard the Tower issue the B747 a clearance to cross Runway 28L. He was on Taxiway Q at the time. We were just starting our rotation when we passed Taxiway Q and were subjected to significant buffeting from his jet blast. We managed to complete the take off without incident. The First Officer mentioned that this was the second time this has happened to him at SFO. The Tower needs to be aware of the hazard of jet blast from this size aircraft and not allow taxi while another aircraft is taking off behind it. A smaller aircraft would be even more adversely affected.
B747 departure from SFO Runway 28R was subjected to significant buffeting on rotation from another B747 being taxied across Runway 28L at Taxiway Q; the reporter indicating that this was the second encounter at SFO.