As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL CABIN EMERGENCY LIGHTS STAY ILLUMINATED WHEN THE SWITCH IS IN THE ARM POSITION. ATTEMPTED TO CHARGE BATTERIES, OPS CHECK FAILED. DISCONNECTED CONNECTOR PLUG FROM AFT BATTERY AND LIGHTS WORKED AS THEY SHOULD. REMOVED AND REPLACED AFT BATTERY WITH NEW BATTERY. CHARGED BATTERY FOR ONE HOUR AND OPS CHECKED SYSTEM WITH NO DEFECTS NOTED IAW AMM 33-52-01. ORIG SUBMISSION DATE: 12/27/2022