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B737 flight crew reported a track deviation resulted when they momentarily lost LNAV capability following a wake turbulence encounter departing sjc.
| Attributes | |
| ACN | 1450698 |
| Time | |
| Date | 201705 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | SJC.Airport |
| State Reference | CA |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | SID TECKY3 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 204 |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 282 |
| Events | |
| Anomaly | Conflict Airborne Conflict Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
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 first officer 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.
Original NASA ASRS Text
Title: B737 flight crew reported a track deviation resulted when they momentarily lost LNAV capability following a wake turbulence encounter departing SJC.
Narrative: 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.
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.