As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, MOMENTARY BAG SMOKE EICAS MESSAGE AND CARGO WARNING LIGHT. EICAS MESSAGE WENT AWAY IMMEDIATELY, WARNING LIGHT REMAINED ILLUMINATED. NO FIRE OR SMOKE OBSERVED THROUGH SIGHT WINDOW IN LAV. MX RESET AND PERFORMED AN OPS CHECK OF THE BAG SMOKE DETECTION SYS SUCCESSFULLY. ACFT WAS APPROVED FOR RETURN TO SERVICE.