As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A CARGO DOOR WARNING INDICATION ILLUMINATED, DURING THE TAXI FOR DEPARTURE. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED AND RERACKED THE PROXY SWITCH ELECTRONIC UNIT (PSEU), IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-61-12. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.