An A319 flight crew experienced a bird strike in the left engine on takeoff. With abnormal oil pressure and vibration; the crew shut down the engine; declared an emergency; and returned to land at departure airport.

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Attributes
ACN	714632
Time
Date	200610
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 800
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : zzz.tracon tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure sid : zzz
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 228 flight time total : 16500 flight time type : 9350
ASRS Report	714632
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical inflight encounter : birds
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed in emergency condition flight crew : diverted to another airport flight crew : declared emergency
Consequence	other other
Supplementary
Problem Areas	Environmental Factor
Primary Problem	Environmental Factor

Narrative:

Night/VFR takeoff from runway X at ZZZ. Passing 800 ft AGL in climb; saw what appeared to be a large bird (goose?) streak through landing lights left of aircraft centerline followed immediately by 'thunk' sound and then loud; high pitched whining noise. Checked engine instruments and saw fluctuating oil pressure and higher vibration monitor reading on left engine. Slowly reduced thrust on both engines while continuing the climb to initially assigned altitude of 7000 ft. Noise and oil pressure fluctuations were reduced as thrust was reduced. Declared an emergency with departure control and asked for vectors back around to same runway. Xferred control of aircraft to first officer while I briefed flight attendants and made PA to passenger. Also told first officer to set up FMS for ILS to runway X at ZZZ. Took control back after briefing flight attendants and passenger. Accomplished checklists. Approach and landing uneventful. Evidence of bird strike found in left engine after we parked at the gate.

Original NASA ASRS Text

Title: AN A319 FLT CREW EXPERIENCED A BIRD STRIKE IN THE L ENG ON TKOF. WITH ABNORMAL OIL PRESSURE AND VIBRATION; THE CREW SHUT DOWN THE ENG; DECLARED AN EMER; AND RETURNED TO LAND AT DEP ARPT.

Narrative: NIGHT/VFR TKOF FROM RWY X AT ZZZ. PASSING 800 FT AGL IN CLB; SAW WHAT APPEARED TO BE A LARGE BIRD (GOOSE?) STREAK THROUGH LNDG LIGHTS L OF ACFT CTRLINE FOLLOWED IMMEDIATELY BY 'THUNK' SOUND AND THEN LOUD; HIGH PITCHED WHINING NOISE. CHKED ENG INSTS AND SAW FLUCTUATING OIL PRESSURE AND HIGHER VIBRATION MONITOR READING ON L ENG. SLOWLY REDUCED THRUST ON BOTH ENGS WHILE CONTINUING THE CLB TO INITIALLY ASSIGNED ALT OF 7000 FT. NOISE AND OIL PRESSURE FLUCTUATIONS WERE REDUCED AS THRUST WAS REDUCED. DECLARED AN EMER WITH DEP CTL AND ASKED FOR VECTORS BACK AROUND TO SAME RWY. XFERRED CTL OF ACFT TO FO WHILE I BRIEFED FLT ATTENDANTS AND MADE PA TO PAX. ALSO TOLD FO TO SET UP FMS FOR ILS TO RWY X AT ZZZ. TOOK CTL BACK AFTER BRIEFING FLT ATTENDANTS AND PAX. ACCOMPLISHED CHKLISTS. APCH AND LNDG UNEVENTFUL. EVIDENCE OF BIRD STRIKE FOUND IN L ENG AFTER WE PARKED AT THE GATE.

Data retrieved from NASA's ASRS site as of January 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.