What was found
ON TAKEOFF FROM ILN, DURING LANDING GEAR RETRACTION, GOT SUBSTANTIAL IMPACT SOUND FROM LEFT ENGINE AREA, AND BURNING SMELL AFTER SOUND. NO ENGINE ABNORMALITIES OR EXCEEDANCES. LANDED UNDER WEIGHT. C/W BIRD STRIKE INSPECTION BORESCOPE & BLADE REPLACEMENT ON LT ENGINE REF W/P 600264766 FOR DOCUMENTATION. MAINTENANCE PULLED THE THREE DAMAGED BEYOND LIMIT BLADES AND ADDITIONAL 180 BLADE FOR A TOTAL OF FOUR BLADES THAT NEED CHANGED. AIRCRAFT TOOK SOME BIRDS AS WELL, BUT NO DENTS ON AIRFRAME FOUND.