What was found
NOTICED A SLIGHT ODOR OF ELECTRICAL SMOKE OR POSSIBLE PLASTIC BURNING IN OVEN. CALLED F/A & WHO SAID OVENS WERE OFF BUT THEY NOTICED THE ODOR IN THE CABIN. ODOR DISSIPATED IN A COUPLE OF MINUTES. NO VISIBLE SMOKE. NOTHING INOPERATIVE IN CABIN OR FLIGHT DECK. ONLY A FLICKERING SEAT BELT SIGN BY ROW 27, A/B 2 HOURS LATER CREWMEMBER AROUND THE WINDOW EXIT ROW THINKS HE GOT A WHIF OF VERY SHORT DURATION, 2 SEC, WHEN THE LEAD CHANGED VIDEO TAPE. WE SECURED THE IFE & WI-FI. CAME BACK DIVERTED. UPON INVESTIGATION FOUND RT RECIRCULATION FAN INOPERATIVE AND SMELLING DUE TO BEARING FAILURE. REMOVED FAN IAW MM 21-25, CPC 898386. INSTALLED NEW RT RECIRCULATION FAN AND VIBRATION MONITOR. OPS CHECK GOOD, SECURED BACK WALL OF FWD CARGO BIN IAW AMM 21-25-01.