Narrative:

Takeoff conditions were IMC and windy. It was my leg to fly. Before takeoff we briefly briefed the possibility of wind shear after takeoff. Once we did the takeoff; we actually encountered a caution wind shear. The reason for this [report] is my insufficient wind shear SOP. I did not move the thrust lever to max nor said the callout. Because I did not move the levers to max thrust the wind shear guidance did not activate. However; because I seemed to have tunnel vision; thought it did activate and ensured positive aircraft control at all times. The captain also missed the call outs; however I do not blame the captain for it as she was probably focused on seeing if I would ever push the thrust lever to max and ensure I had positive aircraft control.the captain and I had a thorough briefing once we landed about the issues and how we could have done better. We briefed that next time we should ensure we go over the procedure mentally and do some chair flying to better prepare as to avoid the heat of the moment mistakes in not the most comfortable turbulence and situation. Additionally; I learned how my body reacted and will ensure next time I do the SOP properly.at the moment of wind shear; I knew what I had to do; callout wind shear max thrust and push it to max thrust. However; in the heat of the moment I may have suffered confirmation bias when I heard the attcs (automatic takeoff thrust control system) move thrust automatically to max thrust and made me hesitate. So when I noticed my hesitation I just forgot about SOP and focused on maintaining aircraft control by ensuring airspeed wings level with the rolling tendencies the turbulence was doing.

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Original NASA ASRS Text

Title: Air carrier flight crew reported receiving a windshear warning on takeoff and failing to preform the Wind Shear Maneuver.

Narrative: Takeoff conditions were IMC and windy. It was my leg to fly. Before takeoff we briefly briefed the possibility of wind shear after takeoff. Once we did the takeoff; we actually encountered a caution wind shear. The reason for this [report] is my insufficient wind shear SOP. I did not move the thrust lever to max nor said the callout. Because I did not move the levers to max thrust the wind shear guidance did not activate. However; because I seemed to have tunnel vision; thought it did activate and ensured positive aircraft control at all times. The Captain also missed the call outs; however I do not blame the Captain for it as she was probably focused on seeing if I would ever push the thrust lever to max and ensure I had positive aircraft control.The Captain and I had a thorough briefing once we landed about the issues and how we could have done better. We briefed that next time we should ensure we go over the procedure mentally and do some chair flying to better prepare as to avoid the heat of the moment mistakes in not the most comfortable turbulence and situation. Additionally; I learned how my body reacted and will ensure next time I do the SOP properly.At the moment of wind shear; I knew what I had to do; callout wind shear max thrust and push it to max thrust. However; in the heat of the moment I may have suffered confirmation bias when I heard the ATTCS (Automatic Takeoff Thrust Control System) move thrust automatically to max thrust and made me hesitate. So when I noticed my hesitation I just forgot about SOP and focused on maintaining aircraft control by ensuring airspeed wings level with the rolling tendencies the turbulence was doing.

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.