As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CARGO FAIL CAS MESSAGE AND THE RED CARGO FIRE BUTTON CAME ON INTERMITTENTLY. MAINTENANCE INSPECTED AND REPLACED THE DIMMER BOX IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.