What was found
INTERMITTENT MAIN CARGO LOOP 1 STATUS MESSAGES. PERFORMED OPS TEST OF MAIN DECK CARGO SMOKE DETECTION SYSTEM IAW AMM 26-00-00 OPS TEST GOOD. NO FAULTS NOTED AT THIS TIME. AT TIME OF VISITING ACFT STATS MSGS WERE NOT PRESENT. PERFORMED FIM 26-14 FT 809 FOUND FAULT WHEN PRESSING ENG/APU/CARGO SWITCH AND MN CARGTO LOOP 1 AND MAIN CARGO LOOP 2 DID NOT APPEAR ON THE "ECS/MSG". NEEDS FURTHER TROUBLESHOOTING. T/S IAW FIM 26-14 FT 809, OPS CHECKED IAW AMM 26-14-00. SYSTEM CKS NORMAL, NO DEFECTS NOTED.