A321
Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 23000
ATC Issue All Types; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued New Clearance; Flight Crew Took Evasive Action; Flight Crew Requested ATC Assistance / Clarification
Procedure; Environment - Non Weather Related
At cruise FL340 on EAGUL6 arrival into PHX between Zuni and SLIDR when First Officer (F/O) and myself began to feel the aircraft vibrate and shudder. [We] then went into a roll to the left. Not sure if our bank exceeded 30 degrees or not but the F/O who was flying pilot turned off autopilot and rolled plane back level with little if any loss of altitude. I then asked ATC if they had a heavy in our area and they told us they had a B747 that they descended from FL380 in front of us but they were 10 miles ahead. [A B737] behind us reported the same wake turbulence at FL340. We then rearmed the autopilot and requested an offset to the right of course to avoid any further occurrences. I did speak with our flight attendants to let them know what had happened; and as we then started to descend into PHX while briefing the passengers on the current weather in PHX I mentioned that what they felt was the wake turbulence from another aircraft. We landed Runway 26 behind the 747 but slowed for more spacing and remained slightly above the glide path to avoid any further wake encounter. Failure of ATC to provide proper separation from heavy while descending him in front of us. Vector heavy to avoid same course as us or provide more separation.
A321 Captain reported encountering wake turbulence on arrival into PHX 10 miles in trail of a B747 that descended through his altitude.