Medium Large Transport
Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 9060
Workload; Time Pressure; Distraction
Inflight Event / Encounter Weather / Turbulence
Flight Crew Executed Go Around / Missed Approach; Flight Crew Took Evasive Action
Weather
During approach to runway 27 right at ORD we encountered a decreasing performance windshear at approximately 700 feet AGL. The windshear computer displayed the red WINDSHEAR display on both attitude indicators and the subsequent WS/WS mode was activated in both FMA windows located above the attitude indicator. I called out 'ESCAPE; SET MAX THRUST!' the first officer set APR thrust and pitched into the windshear guidance bars which while I monitored the radio altitude. We exited the windshear condition after about 9 secs as verified by the windshear annunciation leaving both attitude indicator displays and backed up with increasing radio altitude and increasing aircraft performance. We had saved about 800 pounds of fuel during arrival and had about 3;800 pounds on board the aircraft; so I decided to attempt a second approach. However we did inform Dispatch that in the event of an unsuccessful second approach that we would be [advising ATC] for fuel and possibly diverting to MKE as their runways seemed more suited for the winds that we were experiencing. We landed successfully on our 2nd attempt to runway 27R at ORD without any windshear indications. Gust wind conditions at ORD. Just prior to the windshear computer activating the ORD tower controller reported a momentary gust up to 41 knots. I believe ORD Tower could re-orient the arrivals to utilize runways 22L and 22R when wind conditions favor those runways more. As opposed to utilizing the three parallel arrivals just to suit the arrival rate. I feel like they may have been more concerned about delays and keeping the arrival rate high as opposed to utilizing the runways best suited for aircraft performance.
[Report narrative contained no additional information.]
Air carrier flight crew reported encountering a wind shear event while conducting an approach at ORD. An escape maneuver was successfully performed followed by an uneventful approach and landing.