As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4167 THE CREW REPORTED THE LEFT AFT EXTERIOR EMERGENCY LIGHT FAILED TO ILLUMINATE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE LEFT AFT EXTERIOR EMERGENCY LIGHT. THE OPERATIONAL CHECK WAS GOOD IAW AMM 33-50-10. THE AIRCRAFT WAS RETURNED TO SERVICE.