Boeing Company Undifferentiated or Other Model
Flight Crew Last 90 Days 200; Flight Crew Total 9380; Flight Crew Type 5740
Aircraft Equipment Problem Less Severe; Inflight Event / Encounter Weather / Turbulence
Flight Crew Executed Go Around / Missed Approach; General Maintenance Action
Aircraft; Human Factors; Weather
Dulles Tower [was] reporting windshear alert. We had a 20 KT gain at 500 FT and began going high on glideslope. Executed missed approach when got a TE Flap Disagree EICAS. Flap handle at 20 and flaps locked out at 23. Ran the checklist and performed uneventful 20 flap approach to landing.
Air Carrier First Officer reports a go around due to an unstabilized approach caused by windshear. A TE flap disagree EICAS message is displayed during the go around with the flaps locked at 23 degrees. After compliance with QRH procedures an uneventful partial flap landing ensues.