What was found
CABIN CREW REPORTED VISABLE SMOKE AND STRONG BURNING ODOR IN CABIN, STRONGEST AROUND ROWS 7-10. SMELL SPRED FROM AFT GALLEY TO COCKPIT DISSAPATED AFTER COMPLETION OF QRH (C9001 USED DUE TO EMPLOYEE NR 80553 NOT RECOGNIZED FOR ENTRY) INSPECTED ACFT IAW AMM 05-51-26 WHILE PERFORMING ENGINE RUNS FOUND LT RECIRC FAN CB POPPED WOULD NOT RESET. INSP LT RECIRC FAN FAN FOUND ELECTRICAL BURNING ODOR AND BEARING HARD TO TURN R & R LT RECIRCULATION FAN IAW AMM 21-25-02. OPS CHECK GOOD ALSO R & R BOTH LT AND RT FILTERS IAW AM ROTABLE PARTS CHANGE WAS INDICATED.