Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 200; Flight Crew Total 20000; Flight Crew Type 5000
Communication Breakdown; Confusion; Distraction; Situational Awareness
ATC Issue All Types; Conflict Ground Conflict; Less Severe; Ground Incursion Runway; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Requested ATC Assistance / Clarification
Airport; Environment - Non Weather Related; Procedure
We were cleared for takeoff 34R. Another aircraft had just cleared Runway 34R at E and not turned south on to B taxiway. We were cleared for takeoff. As we approached E on 34R we were in the process of rotating and it was apparent that the other aircraft's tail was not on the taxiway side of the intersection markings. The tail of the other aircraft was not intruding over the runway side marker paint. As we passed the tail of the other aircraft we experienced a strong bump from his engines. Takeoff and climb were normal after that.
We mentioned it to Tower who replied that he was 'clear of the runway.'
An Air Carrier Crew departed SEA Runway 34R and received jet blast when barely airborne from a B747-400 which had not cleared the runway hold short lines to exit the runway.