Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 69; Flight Crew Total 10301; Flight Crew Type 2994
Physiological - Other
Flight Deck / Cabin / Aircraft Event Illness / Injury; Inflight Event / Encounter Weather / Turbulence; Inflight Event / Encounter Loss Of Aircraft Control
Flight Crew Regained Aircraft Control; General Physical Injury / Incapacitation
Weather
During cruise flight attendants were seated by Captain due to continuous light chop with reports of moderate chop ahead. After close to an hour of flight attendants being seated; we experienced a momentary encounter with moderate mountain wave turbulence where the aircraft banked about 20 degrees and airspeed increased 10 to 15 kts. Event lasted about 10 seconds. Pilot spoke with FAs (Flight Attendants) and they all said they were fine as well as all passengers. Everyone was seated during the turbulence encounter. Later in the flight a FA said her neck had some pain and she thought it was due to the turbulence encounter earlier. She said she was ok to perform her duties for the remainder of the flight and for her return flight. Dispatch and the station were notified; and a FA supervisor met the aircraft to discuss the incident/injury with the flight attendant.
Air carrier First Officer reported that an encounter with mountain wave turbulence cause a brief loss of control and resulted in a Flight Attendant injury.