As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED ELECTRIC EMERGENCY ABNORMAL AND EMERGENCY LIGHTS NOT ARMED MESSAGES, RETURNED TO DCA. REINITIALIZED ELECTRICAL SYSTEM IAW EMB AMM 24-36-00 WITH NO DEFECTS NOTED. PERFORMED ENGINE RUNS WITH ELECTRICAL LOAD TRANSFER NORMAL AND OPERATIONAL CHECK OF EMERGENCY LIGHTS WITH NO DEFECTS. RETURNED AIRCRAFT TO SERVICE.