What was found
AT APPROX 15:25Z (4 HOURS INTO FLIGHT) A CRUISE ALTITUDE, A "SMELL OF SMOKE BETWEEN ROWS 25 AND 26 LASTED APPROX 30 MIN", BY AN IN-FLIGHT TEAM MEMBER. AFTER BEING ADVISED OF THE ISSUE VIA ACARS, MAINT CONTROL ADVISED THE CREW TO COMPLETELY TURN OFF THE IN-FLIGHT ENTERTAINMENT SYS (IFE) AS A PRECAUTION AND POSSIBLE FAULT ISOLATION. UPON LANDING, CREW MEMBERS BRIEFED MAINT TECH FOR TROUBLESHOOTING ISSUE. AFTER A DETAILED VISUAL INSP AND EXTENSIVE OPS CHECK OF SUSPECTED SYS COMPONENTS, THE DISCREPANCY COULD NOT BE DUPLICATED DURING THE OVERNIGHT MAINT CHECK. SINCE NO DEFECT OR MALFUNCTION COULD BE IDENTIFIED, NO COMPONENTS WERE REPLACED. STC`S AND PMA`S ARE IN COMPLIANCE. AS OF NOW THERE ARE NO KNOWN AD OR SB RELATED TO VRD`S IFE SYS. (K)