As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3813 THE CREW REPORTED THE F/A SAW SPARKS COMING FROM THE SPEAKER GRILL WHILE TAXIING. THE AIRCRAFT RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED BY REMOVING THE GRILL OF THE SPEAKER AND LOOKING AT ASSOCIATED COMPONENTS. THERE WAS NO EVIDENCE OF SPARKS OR BURNING NOTED. THE COVER WAS REINSTALLED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.