What was found
ENG 1 FAILURE ON CLIMBOUT, AFTER T/O CHECK COMPLETE, PASSING 5,500 FT LOUD BANG ENG 1 FAIL MESSAGE ON EICAS E1 FAILURE / DECLARED EMERGENCY / EQP SWAP FLT CONT. ENG #1 INSP REVIELED HEAVY DAMAGE TO COMPRESSOR, PERFORMED ENGINE REPLACEMENT OF #1 ENGINE AS PER ENVOY W/C 71-000-00 OPS CHECK AND LEAK CHECK GOOD.