B737-700 flight crew reported a course deviation resulted when they were distracted by a wake turbul...

Attributes
ACN	1535609
Time
Date	201804
Local Time Of Day	0601-1200
Place
Locale Reference	LAX.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
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
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 261
Events
Anomaly	Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter

Narrative:

On irnmn one arrival into lax we were slowed to 170 for spacing behind a B777. We encountered wake turbulence in the descent that was severe enough in pitch from side to side [and] required autopilot disengagement. We had briefed a visual approach to runway 24R; and [we] were cleared for the visual behind the B777. I was concerned about altitude behind that aircraft with the earlier turbulence and was distracted as we were on a dogleg to final. With my lax VOR frequency in primary; and localizer frequency for 24R in standby; we flew through final and were queried by the tower due to traffic inbound behind and above our path for 25L. We told him we were correcting and continued uneventfully.

Original NASA ASRS Text

Title: B737-700 flight crew reported a course deviation resulted when they were distracted by a wake turbulence encounter on arrival into LAX.

Narrative: On IRNMN ONE Arrival into LAX we were slowed to 170 for spacing behind a B777. We encountered wake turbulence in the descent that was severe enough in pitch from side to side [and] required autopilot disengagement. We had briefed a visual approach to Runway 24R; and [we] were cleared for the visual behind the B777. I was concerned about altitude behind that aircraft with the earlier turbulence and was distracted as we were on a dogleg to final. With my LAX VOR frequency in primary; and Localizer frequency for 24R in standby; we flew through final and were queried by the Tower due to traffic inbound behind and above our path for 25L. We told him we were correcting and continued uneventfully.

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 a course deviation resulted when they were distracted by a wake turbulence encounter on arrival into lax.