A B757 in bos ingested birds at liftoff.

Attributes
ACN	627599
Time
Date	200408
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bos.airport
State Reference	MA
Altitude	agl single value : 30
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : bos.tower
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 210 flight time total : 6000 flight time type : 2000
ASRS Report	627599
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	inflight encounter : birds
Independent Detector	other flight crewa other flight crewb other other : 3
Resolutory Action	other
Consequence	other other
Supplementary
Problem Areas	Environmental Factor
Primary Problem	Environmental Factor

Narrative:

At liftoff we saw 2 birds cross the nose from left to right. A moment later we heard a bang. The nose yawed slightly right and immediately recovered. Both engines looed normal and aircraft flew normally. We decided to continue with the turn after tof. I suggested we level at our initial altitude of 5000 ft. We proceeded to clean up the aircraft and tower called and informed us they observed flame from the rear of the engine for a second. The cabin crew did the same. The captain decided we should continue climb out. Departure control informed us a visual inspection of the runway was negative for birds, etc. While investigating further, we called our dispatcher and maintenance coordinator. He electronically queried the engine. (This provides him with more data than we have displayed.) he told us everything looed normal and both he and the dispatcher stated they had no objections to the flight continuing. I suggested that we may have unseen damage and the maintenance coordinator restated that he thought everything was fine. The captain elected to continue to destination. Postflt inspection revealed no visible damage. Both engines operated normally throughout flight.

Original NASA ASRS Text

Title: A B757 IN BOS INGESTED BIRDS AT LIFTOFF.

Narrative: AT LIFTOFF WE SAW 2 BIRDS CROSS THE NOSE FROM L TO R. A MOMENT LATER WE HEARD A BANG. THE NOSE YAWED SLIGHTLY R AND IMMEDIATELY RECOVERED. BOTH ENGS LOOED NORMAL AND ACFT FLEW NORMALLY. WE DECIDED TO CONTINUE WITH THE TURN AFTER TOF. I SUGGESTED WE LEVEL AT OUR INITIAL ALT OF 5000 FT. WE PROCEEDED TO CLEAN UP THE ACFT AND TWR CALLED AND INFORMED US THEY OBSERVED FLAME FROM THE REAR OF THE ENG FOR A SECOND. THE CABIN CREW DID THE SAME. THE CAPT DECIDED WE SHOULD CONTINUE CLBOUT. DEP CTL INFORMED US A VISUAL INSPECTION OF THE RWY WAS NEGATIVE FOR BIRDS, ETC. WHILE INVESTIGATING FURTHER, WE CALLED OUR DISPATCHER AND MAINT COORDINATOR. HE ELECTRONICALLY QUERIED THE ENG. (THIS PROVIDES HIM WITH MORE DATA THAN WE HAVE DISPLAYED.) HE TOLD US EVERYTHING LOOED NORMAL AND BOTH HE AND THE DISPATCHER STATED THEY HAD NO OBJECTIONS TO THE FLT CONTINUING. I SUGGESTED THAT WE MAY HAVE UNSEEN DAMAGE AND THE MAINT COORDINATOR RESTATED THAT HE THOUGHT EVERYTHING WAS FINE. THE CAPT ELECTED TO CONTINUE TO DEST. POSTFLT INSPECTION REVEALED NO VISIBLE DAMAGE. BOTH ENGS OPERATED NORMALLY THROUGHOUT FLT.

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.