What was found
FLT 1818, POS-JFK. DIVERTED TO ORF. BURNING ODOR AT CRUISE 10 MINS LATER VENT BLOWER FAULT AND EXTRACT FAULT; ACCOMPLISHED TSM 05-50-00-810-831-A INSPECTION FOUND EXTRACT FAN TO BE AT FAULT. WILL MEL EXTRACT FAN MCC NOTIFIED. EXTRACT FAN PLACED ON MEL 21-26-02-B CAT C MX 4 UPDATED PLACARD INSTALLED MCC NOTIFIED. AIR CONDITIONING INLET VALVE VERIFIED IN THE OPEN POSITION PER MEL 21-26-02-B (M) PROCEDURE. R & R EXTRACT FAN IAW AMM 21-26-51 OPS CHECK OK. MDDR CLEAR MX-4 UPATED. PLACARD REMOVED.