Narrative:

Our flight was on an IFR flight plan in VFR weather conditions. We were on radar vectors for a visual approach and we were level at 6000 ft as cleared. I noticed a glider coming directly towards us at our altitude. I immediately took the controls from the first officer and stated 'pull up; pull up.' then I keyed the microphone and told approach control we were climbing from 6000 feet to 7000 feet for traffic avoidance. We climbed to 6700 feet and then returned to our assigned altitude of 6000 feet. There was no TCAS warning as the glider had no transponder or electrical system. I estimate we missed the glider by 200 feet vertically.

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Original NASA ASRS Text

Title: An MD83 took evasive action to avoid a sailplane at his assigned altitude.

Narrative: Our flight was on an IFR flight plan in VFR weather conditions. We were on radar vectors for a visual approach and we were level at 6000 ft as cleared. I noticed a glider coming directly towards us at our altitude. I immediately took the controls from the First Officer and stated 'PULL UP; PULL UP.' Then I keyed the microphone and told Approach Control we were climbing from 6000 feet to 7000 feet for traffic avoidance. We climbed to 6700 feet and then returned to our assigned altitude of 6000 feet. There was no TCAS warning as the glider had no transponder or electrical system. I estimate we missed the glider by 200 feet vertically.

Data retrieved from NASA's ASRS site as of April 2012 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.