As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BAGG EXT LIGHT & BAGG SMOKE EICAS WARNING AT GATE, THEN EICAS WARNING IMMEDIATELY EXTINGUISHED. R & R BOTH FWD & AFT SMOKE DETECTOR FROM THE CARGO COMPARTMENT IAW AMM 26-15-01. PERFORMED OPERATIONAL TEST IAW AMM 26-15-00. OPERATIONS CHECKED GOOD, NO MSG NOTED.