As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING POWER ON CHECKLIST, THE EMERGENCY LIGHTS WILL NOT ILLUMINATE ON THE RIGHT SIDE MAIN CABIN ZONES, 1 AND 2. ALL OTHER EMERGENCY LIGHTS ARE ILLUMINATED. A POWER CYCLE OF THE AIRPLANE WAS COMPLETED UNSUCCESSFULLY. INITIATED #3 E-BATT TEST/RESET FUNCTION. PERFORMED SATISFACTORY OPERATIONAL CHECK IAW GL-7500 AMM 33-53-05.