What was found
DURING FLIGHT, RT FIRE ANNUNCIATOR ILLUMINATED FOR 3 TO 5 SECONDS. SHUT DOWN ENGINE AS PRECAUTION NO SECONDARY FIRE INDICATIONS DID NOT DISCHARGE BOTTLE. DIVERTED, LANDED WITHOUT INCIDENT. INSPECTED RT FIRE DETECTION SYS NO DEFECTS NOTED, INSPECTED FIRE BOTTLE FOUND MOISTURE IN ELECTRICAL BOOT, CLEANED MOISTURE. OPS CHECK OK.