Engine vibration causes return land.

Attributes
ACN	250684
Time
Date	199309
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mco
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mco
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : takeoff climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7200 flight time type : 2000
ASRS Report	250689
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other other
Consequence	other Other
Supplementary
Primary Problem	Aircraft

Narrative:

Possible bird strike. At V1 engine indications normal. Fan vibration started to increase on #2 engine. At 1000 ft fan vibration indicated 1.1, at 5000 ft fan vibration #2 engine really bad -- 2.1, at 8000 ft fan vibration #2 engine really bad -- 2.9. Return to mco was initiated with power reduction on #2 engine. No overtemps, overspds or abnormal indications other than fan vibration #2 noted. Post-flight inspection revealed damage to 3 blades #2 engine.

Original NASA ASRS Text

Title: ENG VIBRATION CAUSES RETURN LAND.

Narrative: POSSIBLE BIRD STRIKE. AT V1 ENG INDICATIONS NORMAL. FAN VIBRATION STARTED TO INCREASE ON #2 ENG. AT 1000 FT FAN VIBRATION INDICATED 1.1, AT 5000 FT FAN VIBRATION #2 ENG REALLY BAD -- 2.1, AT 8000 FT FAN VIBRATION #2 ENG REALLY BAD -- 2.9. RETURN TO MCO WAS INITIATED WITH PWR REDUCTION ON #2 ENG. NO OVERTEMPS, OVERSPDS OR ABNORMAL INDICATIONS OTHER THAN FAN VIBRATION #2 NOTED. POST-FLT INSPECTION REVEALED DAMAGE TO 3 BLADES #2 ENG.

Data retrieved from NASA's ASRS site as of July 2007 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.