What was found
HKG/ICN - AFTER TAKEOFF CLIMBING THROUGH 13,000 FEET, HAD INDICATION OF MAIN DECK CARGO FIRE. NO EICAS, NO WARNING BELL, JUST OVERHEAD SWITCH. IT WAS RAINING VERY HARD AND HIGH MOISTURE CONTENT IN AIRCRAFT. DEEP CLEANED MAIN DECK CARGO FIRE SWITCH. PERFORMED CMC GROUND TEST PASS PER MM 26-16-00. (M)