As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY EQUIPMENT PLACARD - GENERAL PROCEDURE - DURING INSPECTION WAS FOUND 01EA EMERGENCY FLASH GREEN LIGHT FAILURE AT POSITION OVERHEAD FLIGHT CREW REST. REMOVED AND REPLACED BATTERY EMERGENCY FLASH LIGHT AS PER DMC-B787-A-25-64-00-00B-921A-A AT POSITION OVERHEAD FLIGHT CREW REST. ITEM GOOD FOR SERVICE.