As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5027, DURING CRUISE AT FL 330, SENIOR FLIGHT ATTENDANT REPORTED UNIDENTIFIED FUMES AT REAR LEFT SIDE OF "A" ZONE. NO SMOKE VISIBLE. PASSENGER REPORTED SIMULTANIOUS LOSS OF AUDIO ENTERTAINMENT. THE AIRCRAFT WAS FERRIED FROM YQX TO IND. MAINTENANCE AT IND REMOVED AND REPLACED THE MUX ENCODER BELOW SEAT 9D AND PERFORMED AN OPERATIONAL CHECK.