What was found
PACK 1 MAKES WEIRD NOISE AND BURNING SMELL, THEN GOT PACK 1 OVERHEAT CAUTION. C/W FIM TASK 21-51-00-810-804-A. FOUND TO BE TRANSITORY CONDITION NO FAULTS NOTED. PACK 1 RESTORED TO ORIGINAL CONFIGURATION, INTERROGATED CMC AND FOUND NO CORRELATED CMC MSG. PERFORMED OPC IAW AMM 21-51-00-700-802-A FOUND ACM TO BE SEIZED THEN GOT PACK 1 OVHT MSG ON EICAS. OPS CHK GOOD MULTIPLE TIMES. REMOVED AND REPLACED #1 PACK ACM IAW EM-2100-049 AND EMB-145 M/M 21-51-03, OPS CHECK GOOD.