What was found
DURING CRUISE, PILOTS EXPERIENCED SLIGHT SMOKE AND BURNING ODOR. DIVERTED TO DES MOINES AND LANDED UNEVENTFULLY. INSPECTED CABIN, AVIONICS BAY, AND CARGO BAYS AND FOUND NO DEFECTS. FOUND LEFT CABIN FAN SUPPLY CIRCUIT BREAKER POPPED AND LEFT FAN INDICATION IN THE COND PAGE. APPLIED MEL PROVISIONS FOR LEFT CABIN FAN. AIRCRAFT RETURNED TO SERVICE.