A319 captain reports engine vibration just after lift off. Engine is retarded to idle and flight ret...

Attributes
ACN	814713
Time
Date	200812
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 500
Environment
Weather Elements	Fog
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	814713
Events
Anomaly	aircraft equipment problem : critical inflight encounter : birds
Independent Detector	aircraft equipment other aircraft equipment : ecam other flight crewa
Resolutory Action	flight crew : landed as precaution flight crew : diverted to another airport other
Consequence	other other
Supplementary
Problem Areas	Environmental Factor Aircraft
Primary Problem	Environmental Factor

Narrative:

After 'positive rate; gear up' and requesting pm for engine heat we heard a loud noise and felt aircraft vibration. About 15 seconds later we got an ECAM engine vibration on engine #2. Pulled engine #2 to idle and the vibration and noise stopped. Climbed on top of clouds at 3000 ft. Cleaned up to flaps 1 degree and turned off engine heat. Tried engine #2 at higher power setting then idle and vibration returned. Pulled engine backed to idle and told approach we were returning to field. Switched first officer to PF and I notified flight attendants; passenger and company we were returning to field. First officer flew the approach and we landed without further incident. We elected to leave engine #2 running in idle until on the ground. Total flight time was approximately :15. Landing weight was approximately 144000 pounds. Rate of descent at touchdown was less than 350 FPM. Upon landing we discovered that we had ingested a bird into engine #2. A bird glanced off the radome and was ingested into engine #2.

Original NASA ASRS Text

Title: A319 CAPTAIN REPORTS ENGINE VIBRATION JUST AFTER LIFT OFF. ENGINE IS RETARDED TO IDLE AND FLIGHT RETURNS FOR OVERWEIGHT LANDING. BIRD INGESTION IS FOUND TO BE THE CAUSE.

Narrative: AFTER 'POSITIVE RATE; GEAR UP' AND REQUESTING PM FOR ENG HEAT WE HEARD A LOUD NOISE AND FELT ACFT VIBRATION. ABOUT 15 SECONDS LATER WE GOT AN ECAM ENG VIBRATION ON ENG #2. PULLED ENG #2 TO IDLE AND THE VIBRATION AND NOISE STOPPED. CLBED ON TOP OF CLOUDS AT 3000 FT. CLEANED UP TO FLAPS 1 DEG AND TURNED OFF ENG HEAT. TRIED ENG #2 AT HIGHER PWR SETTING THEN IDLE AND VIBRATION RETURNED. PULLED ENG BACKED TO IDLE AND TOLD APCH WE WERE RETURNING TO FIELD. SWITCHED FO TO PF AND I NOTIFIED FLT ATTENDANTS; PAX AND COMPANY WE WERE RETURNING TO FIELD. FO FLEW THE APCH AND WE LANDED WITHOUT FURTHER INCIDENT. WE ELECTED TO LEAVE ENG #2 RUNNING IN IDLE UNTIL ON THE GND. TOTAL FLT TIME WAS APPROX :15. LNDG WT WAS APPROX 144000 LBS. RATE OF DSCNT AT TOUCHDOWN WAS LESS THAN 350 FPM. UPON LNDG WE DISCOVERED THAT WE HAD INGESTED A BIRD INTO ENG #2. A BIRD GLANCED OFF THE RADOME AND WAS INGESTED INTO ENG #2.

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.

A319 captain reports engine vibration just after lift off. Engine is retarded to idle and flight returns for overweight landing. Bird ingestion is found to be the cause.