What was found
MAIN CARGO FIRE EICAS MESSAGE ON BLOCK IN, WENT TO GROUND POWER. ALSO MAIN CARGO LOOP 2, MAIN CARGO LOOP 1. WARNING ELEX, AND CABIN ALT AUTO 2, CABIN ALT AUTO 1. TOWER DECLARED EMERGENCY. PERFORMED MAIN CARGO LOOP 1 & 2 BITE PROCEDURE IAW FIM 26-16-00-815-808-003-3. R & R MAIN CARGO SMOKE DETECTOR A1, LOOP 1 IAW MM 26-16-01-422-009-003. PERFORMED OPS CHECK IAW MM 26-16-00-715-217-003. ALSO, REF CABIN ALT AUTO 1 & 2 ITEM 1, THIS PAGE. OPS CHECK GOOD.