What was found
DURING CLIMB-OUT LAS HAD A BURNING ODOR IN COCKPIT. TURNED UTILITY BUSS SWITCHES OFF. ODOR KEPT GETTING WORSE. TURNED LEFT PACK OFF, SAW SMOKE COMING FROM F/O'S GASPER. TURNED EQUIPMENT COOLING FAN TO ALTERNATE. DIVERTED TO DENVER. MAINTENANCE: TROUBLE/SHOOTING SYSTEM IAW MM 21-00-01. INSPECTED AIR CONDITIONING SYSTEM, FOUND RECIRCULATION AIR FILTER AND EQUIPMENT COOLING FILTER VERY DIRTY. REPLACED BOTH FILTERS IAW MM 21-25-02. RAN PACKS FOR SEVERAL HOURS, NO ODOR NOTED. A/C OK TO CONTINUE SERVICE.