As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4253 DURING TAXI THE CREW REPORTED THE EMERGENCY LIGHT WAS NOT ARMED WITH COCKPIT IN ARM POSITION. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE EMERGENCY LIGHT ARM SWITCH IAW AMM 20-43-03. THE OPERATIONAL CHECK WAS GOOD IAW EMB AMM 33-50-00. THE AIRCRAFT WAS RETURNED TO SERVICE.