As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. 4R DOOR OUTSIDE EMERGENCY LIGHT SWITCH WAS IN ARM POSITION. MAINTENANCE REPLACED 4R DOOR EMERGENCY LIGHT BATTERY PACKS FORWARD AND AFT (SEE AALA201810249017) PER AMM 33-51-06 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.