As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONT OVERNIGHT MX - WHILE PERFORMING OPERATIONAL CHECK ON EMERGENCY LIGHTING SYSTEM MX FOUND EMERGENCY EXIT LIGHTS WILL NOT ILLUMINATE FROM 8ABC TO 14ABC INCLUDING EXIT HATCH LIGHTING. MX PERSONNEL FOUND CONNECTOR LOOSE AND RE-TIGHTEN CONNECTOR AT SEAT 12A BATTERY SUPPLY, PERFORMED OPS CHECKS ON EMERGENCY LIGHTING IAW EMB 145 AMM 33-50-00, OP'S CHECKS SATISFACTORY. A/C WAS RETURNED FOR SERVICE IN AIRWORTHY CONDITIONS.