As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ENGINE START EMERGENCY LIGHTS ROW 7, 8, & 9 BLINK ON AND OFF. MAINTENANCE INSPECTED AND REPLACED THE 7LK BATTERY IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.