As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PREPARING FOR DEPARTURE, WHEN THE FLAPS WERE SELECTED TO 12 DEGREES, THE FLAP INDICATOR REMAINED AMBER. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED AND REPLACED THE FLAP CONTROL UNIT, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 27-50-00. OPERATION CHECKS WERE COMPLETED.