Flight Crew Air Transport Pilot (ATP)
Communication Breakdown
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Flight Crew Executed Go Around / Missed Approach
Human Factors; Procedure; Weather
On the Arrival we encountered a line of weather that was moving west to east and were given deviations to maneuver around the weather while lining up for downwind on Runway 18R. ATIS was calling for +RA on the field with wind shear advisories in effect. The Captain and I reviewed the wind shear procedure and precautions well in advance of arriving into the area. Once we were cleared for the approach to 18R; Tower warned of possible wind shear on a 1 mile final to runway 18R. At the time we were on roughly a 4 mile final and planned to carry an additional 5 knots of airspeed. Winds were reported as 250 at 11 knots. At roughly a 1 mile final (300' AGL) we encountered about a 20 knot loss of airspeed along with a Ground proximity Warning System (GPWS) 'GLIDESLOPE' alert. As the Pilot Flying (PF); I recognized the wind shear and immediately pushed the throttles up to correct the situation while performing the wind shear procedure.Although I think we safely aviated through the problem and recovered safely on the second approach; here's what we both learned from the debrief. While performing the wind shear escape maneuver as the PF I said; 'wind shear' but did not make it 100% clear to the Captain what I was doing. There was some miscommunication between the Captain and I whether or not we were doing a wind shear escape or a go-around. We did not receive a 'Windshear' warning from the GPWS.
Widebody Aircraft First Officer reported performing a successful windshear escape maneuver; but noted a possible lack of communication with the Captain as to whether he was performing a windshear maneuver or a go-around.