As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT THRU AROUND 4000' EICAS ADVISORY MESSAGE CARGO FWD FIREX HI ARM ILLUMINATED AND THE OVERHEAD PANEL LIGHT ILLUMINATED RED. NO OTHER SMOKE OR FIRE WARNINGS PRESENT. MESSAGE EXTINGUISHED AFTER ABOUT A MINUTE. REMOVED FROM SERVICE. PERFORMED E175 FIM TASK 26-23-00-810-821-A FOR GRC FWD FIREX HI ARM CAS MSG. NO FURTHER DEFECTS NOTED. NO FURTHER MSGS DISPLAYED. PERFORM GVI ON FWD CARGO AND SMOKE DEFECTORS WITH NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.