As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POST-FLT INSP, R-1 DOOR EPAS GREEN STATUS LT INOP. REMOVED AND REPLACED THE 2 9V BATTERIES IN THE R-1 EPAS BATTERY PACK, REF B777 AMM: 52-11-20-4-2. RE-ARMED R-1 EPAS SAFETY SW W/ GREEN FLASHING STATUS LT FUNCTION RESTORED NML. ITEM OK FOR SVC.