Flight Crew Last 90 Days 168; Flight Crew Total 17000; Flight Crew Type 7491
Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued New Clearance; Flight Crew Took Evasive Action
Environment - Non Weather Related; Procedure
Descending on the AVSAR 3B arrival to [Runway] 23L at MMMX we encountered wake turbulence from a B-747 12 miles ahead on the same arrival. We adjusted our speed and descent rate to avoid any further encounter. A few minutes later we were cleared for the ILS 23L and to caution wake turbulence behind the 747. The following controller told us to turn to a 160 heading to intercept the ILS. I told him I didn't want to cut the turn to the ILS to reduce our wake turbulence separation. He insisted that we turn at that time. We began the turn as requested but at a gradual rate to maintain a safe distance. The wind was out of the east at about 7 kts which would have maintained the wake on the glide slope. We landed uneventfully.
A B737 Captain reported encountering wake turbulence 12 miles in trail of a B747 on approach to MMMX.