As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION, FOUND LEFT & RIGHT EXTERIOR EMERGENCY LIGHTS INOPERATIVE DURING PS1 CHECK. REMOVED AND REPLACED THE BATTERY POWER SUPPLY IAW MM 33-50-04 AND EXTERNAL EMERGENCY LIGHT ON RIGHT SIDE IAW MM 33-50-10. AIRCRAFT RETURNED TO SERVICE.