As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUR HRS INTO FLT F/A SMELLED ELEC ODOR IN CABIN MID GALLEY AREA SMELL DISSIPATED, 30 MIN LATER SMELL RETURNED AND THERE WAS A RECIRC FAN STATUS MSG IN COCKPIT. TURNED BOTH RECIRC FANS OFF AND ODOR DISSIPATED. MTC MSG 21-24700 RECORDED FOUND RT LWR REC FAN INOP. NOTED BURNING ODOR UPON REMOVAL. INSTALLED NEW FAN PER M/M, OPS NORMAL MAT SYS TEST PASS OK FOR SERVICE.