Narrative:

We were cleared for takeoff on runway xxl to fly runway heading and climb to 5000 ft. Captain started takeoff and I called 80 KTS 'thrust set.' shortly after; I noticed a bird off the left side of the nose. Captain also saw it and commented on it. Immediately we heard a strange noise from the engine very loud and unusual. Captain announced he was going to continue the takeoff. I looked at the engine instruments and noticed the #2 engine had a higher N1 but was still producing thrust. I called V1; vr and we lifted off. The noise from the engine continued and the captain called for the qrc checklist for engine surge and stall. The checklist was performed by the relief pilots. Captain reduced the throttle of the #2 engine and the noise stopped. In the meantime I switched over to departure. We were given a heading of north and climb to 7000 ft. Then the captain decided to shut down the engine for safety and precautionary reasons due to a possible bird strike. The captain turned the aircraft over to me to fly and shut down the engine per the checklist with the relief pilots. Departure was notified that we had a bird strike and that we needed to assess our situation and that we would probably be dumping fuel and returning to ZZZ. They vectored us and climbed us to 11000 ft. We contacted our dispatch and maintenance. We started our dumping procedure. We dumped approximately 165000 pounds of fuel to reach our maximum landing weight. Once the dumping was accomplished we requested to return to ZZZ and land on runway xxr because of the longer runway length and the current winds at ZZZ. We were told that runway xxr was not available except in an emergency. We declared an emergency and landed on runway xxr and taxied into gate.

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Original NASA ASRS Text

Title: FOLLOWING BIRD STRIKE LATE IN TKOF ROLL; B747-400 SHUTS DOWN #2 ENGINE; DECLARES EMERGENCY; DUMPS 165;000 POUNDS OF FUEL AND RETURNS TO DEP ARPT.

Narrative: WE WERE CLRED FOR TKOF ON RWY XXL TO FLY RWY HDG AND CLB TO 5000 FT. CAPT STARTED TKOF AND I CALLED 80 KTS 'THRUST SET.' SHORTLY AFTER; I NOTICED A BIRD OFF THE L SIDE OF THE NOSE. CAPT ALSO SAW IT AND COMMENTED ON IT. IMMEDIATELY WE HEARD A STRANGE NOISE FROM THE ENG VERY LOUD AND UNUSUAL. CAPT ANNOUNCED HE WAS GOING TO CONTINUE THE TKOF. I LOOKED AT THE ENG INSTS AND NOTICED THE #2 ENG HAD A HIGHER N1 BUT WAS STILL PRODUCING THRUST. I CALLED V1; VR AND WE LIFTED OFF. THE NOISE FROM THE ENG CONTINUED AND THE CAPT CALLED FOR THE QRC CHKLIST FOR ENG SURGE AND STALL. THE CHKLIST WAS PERFORMED BY THE RELIEF PLTS. CAPT REDUCED THE THROTTLE OF THE #2 ENG AND THE NOISE STOPPED. IN THE MEANTIME I SWITCHED OVER TO DEP. WE WERE GIVEN A HDG OF N AND CLB TO 7000 FT. THEN THE CAPT DECIDED TO SHUT DOWN THE ENG FOR SAFETY AND PRECAUTIONARY REASONS DUE TO A POSSIBLE BIRD STRIKE. THE CAPT TURNED THE ACFT OVER TO ME TO FLY AND SHUT DOWN THE ENG PER THE CHKLIST WITH THE RELIEF PLTS. DEP WAS NOTIFIED THAT WE HAD A BIRD STRIKE AND THAT WE NEEDED TO ASSESS OUR SITUATION AND THAT WE WOULD PROBABLY BE DUMPING FUEL AND RETURNING TO ZZZ. THEY VECTORED US AND CLBED US TO 11000 FT. WE CONTACTED OUR DISPATCH AND MAINT. WE STARTED OUR DUMPING PROC. WE DUMPED APPROX 165000 LBS OF FUEL TO REACH OUR MAX LNDG WT. ONCE THE DUMPING WAS ACCOMPLISHED WE REQUESTED TO RETURN TO ZZZ AND LAND ON RWY XXR BECAUSE OF THE LONGER RWY LENGTH AND THE CURRENT WINDS AT ZZZ. WE WERE TOLD THAT RWY XXR WAS NOT AVAILABLE EXCEPT IN AN EMER. WE DECLARED AN EMER AND LANDED ON RWY XXR AND TAXIED INTO GATE.

Data retrieved from NASA's ASRS site as of May 2009 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.