A B747-400 relief pilot reported experiencing high vibration and loud noise from #1 engine after tak...

Attributes
ACN	1002407
Time
Date	201204
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Pilot Not Flying Relief Pilot
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 13000 Flight Crew Type 2000
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Bird / Animal

Narrative:

Completing gear retraction a loud 'growling' noise started on left side of aircraft. Engine vibration N2 5.0 was only indication of an abnormal situation. A few minutes after takeoff there were three jolts with no indications from the engines; a call from flight attendants alerted us to smoke coming from engine number one with each of the jolts. Once ATC was notified; dispatch/maintenance consulted and checklists completed. We dumped fuel to maximum landing weight and returned to [departure airport]. Notified on ground of bird strike; crew debriefed and critiqued.

Original NASA ASRS Text

Title: A B747-400 Relief Pilot reported experiencing high vibration and loud noise from #1 engine after takeoff. They returned to departure airport where they were advised they had struck a bird.

Narrative: Completing gear retraction a loud 'growling' noise started on left side of aircraft. Engine vibration N2 5.0 was only indication of an abnormal situation. A few minutes after takeoff there were three jolts with no indications from the engines; a call from flight attendants alerted us to smoke coming from engine number one with each of the jolts. Once ATC was notified; Dispatch/Maintenance consulted and checklists completed. We dumped fuel to maximum landing weight and returned to [departure airport]. Notified on ground of bird strike; crew debriefed and critiqued.

Data retrieved from NASA's ASRS site as of July 2013 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.

A B747-400 relief pilot reported experiencing high vibration and loud noise from #1 engine after takeoff. They returned to departure airport where they were advised they had struck a bird.