Narrative:

Bird strike at rotation caused high vibration and loud abnormal engine noise with takeoff power. Upon leveling and reduced power; engine ran normal and all instruments read normal. We decided to return to bna and flew an ILS 02C. After landing we found bird remains in the cowl and 3 damaged fan blades.

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Original NASA ASRS Text

Title: An medium large transport aircraft struck birds during takeoff damaging an engine. The crew returned to land and discovered cowl and fan blade damage.

Narrative: Bird strike at rotation caused high vibration and loud abnormal engine noise with takeoff power. Upon leveling and reduced power; engine ran normal and all instruments read normal. We decided to return to BNA and flew an ILS 02C. After landing we found bird remains in the cowl and 3 damaged fan blades.

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.