B737-700 flight crew reported encountering wake turbulence on arrival into lax in trail of a B777 th...

Attributes
ACN	1642849
Time
Date	201905
Local Time Of Day	1201-1800
Place
Locale Reference	LAX.Airport
State Reference	CA
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 220 Flight Crew Type 2300
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 321
Events
Anomaly	Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter

Narrative:

About eight miles in trail of a heavy B777; we experienced wake turbulence that upset the aircraft. The aircraft rolled uncommanded multiple times left and right up to 30-45 degrees. Pilot flying disengaged the autopilot at the first uncommanded roll and hand flew the aircraft. Pilot flying had the pilot monitoring cancel the IAP clearance; and we got vectors back around to [runway] 25L for an uneventful approach and landing. After landing; the a flight attendant notified us the B flight attendant was injured due to the turbulence. We called for a supervisor to meet us. She apparently fell and hit her head on one of the door handles in the rear of the aircraft. Flight attendant B was able to secure herself in her seat for landing. Paramedics/medical attention was not requested by the injured flight attendant. We inquired of the flight attendants if medical attention was needed; they said it was not. We received a replacement flight attendant in lax and the captain spoke with the operations' center chief pilot about what happened.

Original NASA ASRS Text

Title: B737-700 flight crew reported encountering wake turbulence on arrival into LAX in trail of a B777 that resulted in multiple 30 to 45 degree rolls in both directions. A Flight Attendant sustained minor injuries in the encounter.

Narrative: About eight miles in trail of a heavy B777; we experienced wake turbulence that upset the aircraft. The aircraft rolled uncommanded multiple times left and right up to 30-45 degrees. Pilot Flying disengaged the autopilot at the first uncommanded roll and hand flew the aircraft. Pilot Flying had the Pilot Monitoring cancel the IAP clearance; and we got vectors back around to [Runway] 25L for an uneventful approach and landing. After landing; the A Flight Attendant notified us the B Flight Attendant was injured due to the turbulence. We called for a Supervisor to meet us. She apparently fell and hit her head on one of the door handles in the rear of the aircraft. Flight Attendant B was able to secure herself in her seat for landing. Paramedics/medical attention was not requested by the injured Flight Attendant. We inquired of the flight attendants if medical attention was needed; they said it was not. We received a replacement Flight Attendant in LAX and the Captain spoke with the Operations' Center Chief Pilot about what happened.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

B737-700 flight crew reported encountering wake turbulence on arrival into lax in trail of a B777 that resulted in multiple 30 to 45 degree rolls in both directions. A flight attendant sustained minor injuries in the encounter.