B737-700
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 125; Flight Crew Type 125
Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural FAR; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented
Environment - Non Weather Related; Human Factors; Procedure
On approach to 9R in Atlanta we flew through a large roll change due to wake turbulence from an aircraft ahead; aircraft went into Control Wheel Steering and disengaged LNAV mode. Loss of LNAV mode was not noticed until late turn onto 9R Localizer. Deviation corrected by Crew and ATC gave us a new heading to intercept the 9R Localizer. Remainder of the approach and landing was normal.
B737-700 First Officer reported a track deviation following a wake turbulence encounter on approach to ATL.