B737 crew had multiple bird strikes on approach. The aircraft engine was damaged.

Attributes
ACN	622384
Time
Date	200401
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl single value : 2500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 200 flight time total : 14500 flight time type : 4500
ASRS Report	622384
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical inflight encounter : birds other anomaly
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem
Consequence	other other
Supplementary
Problem Areas	Environmental Factor
Primary Problem	Environmental Factor

Narrative:

We flew through a flock of very large birds (geese?) just outside the OM. We heard a few 'thumps' and knew that we hit at least 1 or 2. The autoplt was disconnected to make sure there was no control ability problem. The landing gear was then lowered to ensure that there was no problem getting the gear down and locked, which there wasn't. At about 500 ft AGL, the #2 engine was increased to about 43-44% N1. A compressor stall was felt along with vibration. The power lever was reduced, keeping the #2 engine below 42%. The landing was without incident, other than a very noticeable burning smell in the cabin. The #2 engine was shut down after clearing the runway. Postflt inspection showed bird ingestion in #2 engine with a lot of feathers and remains noted on the engine inlet.

Original NASA ASRS Text

Title: B737 CREW HAD MULTIPLE BIRD STRIKES ON APCH. THE ACFT ENG WAS DAMAGED.

Narrative: WE FLEW THROUGH A FLOCK OF VERY LARGE BIRDS (GEESE?) JUST OUTSIDE THE OM. WE HEARD A FEW 'THUMPS' AND KNEW THAT WE HIT AT LEAST 1 OR 2. THE AUTOPLT WAS DISCONNECTED TO MAKE SURE THERE WAS NO CTL ABILITY PROB. THE LNDG GEAR WAS THEN LOWERED TO ENSURE THAT THERE WAS NO PROB GETTING THE GEAR DOWN AND LOCKED, WHICH THERE WASN'T. AT ABOUT 500 FT AGL, THE #2 ENG WAS INCREASED TO ABOUT 43-44% N1. A COMPRESSOR STALL WAS FELT ALONG WITH VIBRATION. THE PWR LEVER WAS REDUCED, KEEPING THE #2 ENG BELOW 42%. THE LNDG WAS WITHOUT INCIDENT, OTHER THAN A VERY NOTICEABLE BURNING SMELL IN THE CABIN. THE #2 ENG WAS SHUT DOWN AFTER CLRING THE RWY. POSTFLT INSPECTION SHOWED BIRD INGESTION IN #2 ENG WITH A LOT OF FEATHERS AND REMAINS NOTED ON THE ENG INLET.

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.