B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 137; Flight Crew Type 8000
Flight Deck / Cabin / Aircraft Event Illness / Injury; Inflight Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Regained Aircraft Control; General Physical Injury / Incapacitation
Environment - Non Weather Related; Procedure
Descending through 11;000 feet; the aircraft rolled left then right.  As the roll started left again I disconnected the autopilot and applied power.  The rolling motion was uncontrollable until we climbed.  [A] Flight Attendant was knocked to the ground and complained of a hurt neck.  After notifying ATC of the event; ATC indicated that we were 10 miles in trail of a 777.Preventative Measures: I am not sure.  We were well in trail and at an appropriate altitude for Flight Attendant duties.
Reporter stated with 10 miles separation he was not very concerned about a wake turbulence encounter and was surprised at the intensity of the event.
Descending through 11;000 feet into LAX on SADDE 6 Arrival approaching SMO; we encountered severe wake turbulence. We were unable to maintain aircraft control for approximately 15 seconds. The aircraft rolled hard right then left. The Captain disconnected autopilot; applied power and tried to climb above it. We eventually climbed out of it; and I notified ATC. Then I checked with the Flight Attendants to see if anyone was injured.  I was informed that [a] Flight Attendant was injured. I notified ATC. The Flight Attendant received medical care upon landing.
B737 flight crew reported loss of aircraft control; for approximately 15 seconds; when they encountered severe wake turbulence 10 miles in trail of a B777 on approach to LAX. A Flight Attendant was reportedly slightly injured in the event.