B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 204
Situational Awareness; Workload
Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Environment - Non Weather Related; Human Factors; Procedure
I was the Pilot Monitoring. We took off from SJC on Runway 30R on the TECKY 3 Departure. We experienced wake turbulence from preceding aircraft. The FO remarked after that he did not have command bars. I reengaged the LNAV and we began the right turn to the downwind portion. ATC queried us about our position and after confirming the navigation indications I said we show on course.  ATC stated we turned late to the downwind and assigned us a heading. The rest of the flight was uneventful.
I (F/O) was the Pilot Flying.  We were flying a [aircraft] which had several MEL's. Shortly after takeoff; I noticed I had no command bars so I requested to the Captain to fix issue. In addition and to add to this distraction; we departed behind a (other carrier) aircraft and experienced his wake; which required immediate Pilot action.Tower did not give adequate time/spacing in this particular case and we should have requested to wait a bit longer prior to taking off.  After recovering from the wake turbulence; and selecting LNAV; for whatever reason the aircraft was not tracking properly after selection for the departure. I then clicked off the autopilot and manually changed course. We then selected LNAV and reengaged the autopilot.  The aircraft did not immediately track our departure course according to Departure.
B737 flight crew reported a track deviation resulted when they momentarily lost LNAV capability following a wake turbulence encounter departing SJC.