Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 172.68; Flight Crew Type 2600.53
Inflight Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Regained Aircraft Control; Flight Crew Requested ATC Assistance / Clarification; General Physical Injury / Incapacitation
Environment - Non Weather Related; Procedure
We were on descent [on an] RNAV arrival into LAS. ATC was attempting to create separation [with] a heavy aircraft we were following. The autopilot was engaged and [we] encountered a rapid roll to the left which created an upset that required full aileron flight control deflection to stabilize the aircraft in level flight. After the aircraft was stabilized I was in contact with the flight attendants and was informed by the purser that one crew member was down in the aft galley. I landed without further event in LAS. Paramedics met the flight and evaluated the cabin crew. There were no passenger injuries [since] they were all in their seats with the seat belt sign on. The flight attendants were up in the cabin performing their final cabin checks. The event took place at 14;000 feet. Both LAX Center and Vegas Approach Control were trying to create separation for [us] right after departure from LAX. When I informed Vegas Approach that we had an upset he asked if [it] was wake turbulence from the heavy we were following.
B737NG Captain reported an injury to a Flight Attendant resulting from an upset in a wake turbulence encounter on arrival into LAS.