What was found
(AUS) CABIN AFT VACUUM CLEANER OUTLET CONNECTOR ON RH SIDE OF PASSENGER CABIN SHOWED EVIDENCE OF ARCING BETWEEN THE CONNECTOR LIVE TERMINAL AND THE MOUNTING TRIM PANEL WITH A 25.4MM (1IN) DIAMETER BURN ON THE ADJACENT SOUND PROOFING BLANKET - INVESTIGATION FOUND MANUFACTURER HAD FITTED INCORRECT PANELS - UNAPPROVED PART - MANUFACTURING ERROR