B737-300 captain reported encountering wake vortex in trail of a B777 on arrival to lax that resulte...

Attributes
ACN	1021609
Time
Date	201207
Local Time Of Day	1201-1800
Place
Locale Reference	LAX.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	STAR SEAVU
Flight Plan	IFR
Aircraft 2
Make Model Name	B777 Undifferentiated or Other Model
Flight Phase	Initial Approach
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 132 Flight Crew Type 13000
Events
Anomaly	Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter

Narrative:

We were arriving into lax on the seavu arrival landing 25L. Weather was night VMC. At about 20 miles out we were cleared the visual but assigned 170 KTS. We were following a heavy B777 five miles ahead. We experienced significant jetwash/vortices putting us in 45 degrees right bank. I disconnected the autopilot and regained controlled flight and told approach we were slowing to final approach airspeed to gain separation. Approach vectored us out of the pattern to a vector of 210 degrees and stated they would re-sequence us. Subsequently they asked us if we would like to offset and continue. We accepted. We continued uneventfully; staying one dot high on the ILS. Traffic following us became too close and was cleared to land on 25R. Our separation remained five miles due to ATC airspeed assignments. Because it was VMC; I could have been more forceful in staying high on glide slope much earlier in the approach than usual.

Original NASA ASRS Text

Title: B737-300 Captain reported encountering wake vortex in trail of a B777 on arrival to LAX that resulted in a 45 degree bank. ATC provided a clearance off course.

Narrative: We were arriving into LAX on the SEAVU Arrival landing 25L. Weather was night VMC. At about 20 miles out we were cleared the visual but assigned 170 KTS. We were following a heavy B777 five miles ahead. We experienced significant jetwash/vortices putting us in 45 degrees right bank. I disconnected the autopilot and regained controlled flight and told Approach we were slowing to final approach airspeed to gain separation. Approach vectored us out of the pattern to a vector of 210 degrees and stated they would re-sequence us. Subsequently they asked us if we would like to offset and continue. We accepted. We continued uneventfully; staying one dot high on the ILS. Traffic following us became too close and was cleared to land on 25R. Our separation remained five miles due to ATC airspeed assignments. Because it was VMC; I could have been more forceful in staying high on glide slope much earlier in the approach than usual.

Data retrieved from NASA's ASRS site as of July 2013 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.

B737-300 captain reported encountering wake vortex in trail of a B777 on arrival to lax that resulted in a 45 degree bank. ATC provided a clearance off course.