A B767-300 ON TKOF CLB AT 20 FT HAD COMPRESSOR STALL #1 ENG WITH HIGH EGT'S AND VIBRATIONS. DECLARED AN EMER AND DIVERTED. BIRD STRIKE AT LIFTOFF.

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AT APPROX 20 FT AFTER LIFTOFF; I FELT A STRONG YAW TO THE R INDICATIVE OF PWR LOSS ON THE L ENG. I IMMEDIATELY PROCEEDED TO FLY THE ENG-OUT PROFILE WHILE WE CONFIRMED THE EMER. WE SUBSEQUENTLY HEARD A SERIES OF LOUD BANGING NOISES; WHICH WAS ASSOCIATED WITH NUMEROUS PWR FLUCTUATIONS; ALONG WITH A L ENG MAX EGT EXCEEDENCE INDICATED ON EICAS. THE CREW CONCURRENTLY DETERMINED WE WERE HAVING A SERIES OF SEVERE COMPRESSOR STALLS AND REFERRED TO THE APPROPRIATE QRC CHKLIST. WE DECLARED AN EMER WHILE FINISHING THE QRC CHKLIST; NOTIFIED DISPATCH WHILE DUMPING FUEL OVER LAKE MICHIGAN. AFTER DUMPING ABOUT 20000 LBS; WE RECEIVED A MESSAGE FROM DISPATCH VIA ACARS AND HAD A DISCUSSION ABOUT CEASING THE DUMP AND RETURNING TO DO AN OVERWT LNDG. AFTER CONFIRMING WITH DISPATCH WE WOULD BE LEGAL REGARDING OUR RWY/PERFORMANCE LIMITS FOR LNDG; WE ELECTED TO RETURN AND DO AN OVERWT LNDG ON RWY 14R AT ORD. SUPPLEMENTAL INFO FROM ACN 634703: I CHKED THE ENG PARAMETERS AND OBSERVED FLUCTUATING EGT AND A MAX EXCEEDENCE EGT OF 704 DEGS. I BEGAN WORKING WITH THE RELIEF FO TO RUN THE HIGH EGT/COMPRESSOR STALL QRC. ALTHOUGH WE DID NOT SHUT DOWN THE ENG; WE PREPARED FOR AN ENG FAILURE ON FINAL; BUT ELECTED TO LAND FLAPS 30 DEGS. CALLBACK CONVERSATION WITH RPTR ACN 634490 REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE L ENG FAILURE WAS ONE OR MORE BIRDS INGESTED INTO THE L ENG ON LIFTOFF. THE RPTR SAID THE ENG WAS REPLACED DUE TO COMPRESSOR DAMAGE AND EGT EXCEEDANCE.