Narrative:

I was flying and called for 45 degree flaps and the captain selected 45. The flaps started to move; but stopped at around 41 and then started to move up and down 1-2 degrees. We decided to return the flap lever to 30 degrees because that was the last solidly held flap position. At this point we were approximately four miles from the runway and decided to cancel the approach to run the abnormal checklist. After the go around; we finished the checklist and returned for a landing with 30 degrees of flaps.

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Original NASA ASRS Text

Title: A CRJ-200 flight crew executed a go around following a flap extension anomaly; ran the appropriate checklists; and landed uneventfully at a lesser flap setting.

Narrative: I was flying and called for 45 degree flaps and the Captain selected 45. The flaps started to move; but stopped at around 41 and then started to move up and down 1-2 degrees. We decided to return the flap lever to 30 degrees because that was the last solidly held flap position. At this point we were approximately four miles from the runway and decided to cancel the approach to run the abnormal checklist. After the go around; we finished the checklist and returned for a landing with 30 degrees of flaps.

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.