B737 first officer reported bird strike in right engine causing vibration. An emergency was declared...

Attributes
ACN	838792
Time
Date	200906
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Bird / Animal

Narrative:

Ingested bird in #2 engine at rotation. Vibration started immediately. Cause was unknown at the time because we didn't see the bird. #2 engine vibration was 3.5 with noticeable vibration and sound. Declared an emergency and returned to field. Ran QRH pulled engine back till vibration stopped. Landed flaps 15 with #2 at idle. Normal landing and roll out.

Original NASA ASRS Text

Title: B737 First Officer reported bird strike in right engine causing vibration. An emergency was declared and flight returned for landing with the engine at idle.

Narrative: Ingested bird in #2 engine at rotation. Vibration started immediately. Cause was unknown at the time because we didn't see the bird. #2 engine vibration was 3.5 with noticeable vibration and sound. Declared an emergency and returned to field. Ran QRH pulled engine back till vibration stopped. Landed Flaps 15 with #2 at idle. Normal landing and roll out.

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.

B737 first officer reported bird strike in right engine causing vibration. An emergency was declared and flight returned for landing with the engine at idle.