A flight crew returned to their departure airport after experiencing excessive vibration indications...

Attributes
ACN	924671
Time
Date	201012
Local Time Of Day	1801-2400
Place
Locale Reference	PHL.Airport
State Reference	PA
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Widebody Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Bird / Animal

Narrative:

[We noticed] excessive vibration at liftoff; noticed the right engine N1 vibration at 7.5. [We] continued departure and called maintenance control. They advised a return to phl where we made an overweight landing. I had noticed a large white bird fly under the nose at liftoff but thought we had missed the bird. After returning to the gate maintenance observed numerous damaged fan blades due to an apparent birdstrike in the right engine.

Original NASA ASRS Text

Title: A flight crew returned to their departure airport after experiencing excessive vibration indications for the right engine. Inspection revealed damage to the right engine fan blades due to an apparent bird strike.

Narrative: [We noticed] excessive vibration at liftoff; noticed the right engine N1 vibration at 7.5. [We] continued departure and called Maintenance Control. They advised a return to PHL where we made an overweight landing. I had noticed a large white bird fly under the nose at liftoff but thought we had missed the bird. After returning to the gate Maintenance observed numerous damaged fan blades due to an apparent birdstrike in the right engine.

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.