EMB ERJ 170/175 ER/LR
Flight Crew Air Transport Pilot (ATP)
Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Flight Crew Executed Go Around / Missed Approach
Human Factors; Procedure; Weather
Upon starting our brief prior to our descent into ZZZ; my First Officer (FO) read out the latest ATIS; which was OVC Clouds at 2500 feet and a temperature of 0 degrees Celsius. Once he was done briefing the weather; I asked him to get ice speeds just in case we would run into icing conditions. We never did and the field was VFR upon arrival. As we were on final approach; I noticed that our Vapp speed was substantially above green dot and that something didn't quite feel right about our approach. Despite this feeling; I looked at our configuration and there was no indication that something was wrong. I continued the approach. Our Vapp speed at this time was around 142. At about 250 AGL; I immediately noticed a reduction in airspeed and within half a second to a second it went below green dot. This was followed by a red windshear caution and I set thrust to max power and went around. I executed the windshear avoidance maneuver as per the company manual. Upon setting ourselves up to try the approach again; we came back around and landed at 16L with light windshear as we crossed the threshold. As we were taxiing to our gate; my FO mentioned that our original landing was setup with ice speeds. I asked him why he had configured us for ice speeds when we never got the 'Stall Protect Ice Speed' EICAS message and he responded with; 'Because you told me to get ice speeds.' He had misunderstood me trying to be proactive when I had requested this 'just in case' and thought I wanted him to set us up with Ice speeds regardless of the situation. This was not my intent whatsoever as I assumed he was aware to not set up the box with ice speeds unless the 'Stall Protect Ice Speed' EICAS message popped up. Unfortunately; I didn't catch this until after we landed.I should have communicated better with my FO; in order to make sure that he wouldn't misunderstand me. I should have questioned the high Vref and Vapp speeds in relation to our weight once we got on final. I shouldn't have assumed that my FO knew not to setup the box with ice speeds despite the Stall Protect Ice Speeds not having shown up on the EICAS.not having shown up on the EICAS.
EMB-175 Captain reported that after a windshear encounter and go-around; it was discovered that the First Officer had calculated 'ice speeds' rather than normal speeds due to a miscommunication.