What was found
DURING DESCENT AT APPROXIMATELY 12,000 FT, FUMES WERE SMELLED IN THE COCKPIT. DIRTY, MUSTY, ACID SMELL. DONNED OXYGEN MASK FOR REMAINDER OF FLIGHT. INSPECTED ALL AVIONICS EQUIPMENT. NO FUMES NOTED. GROUND RAN ALL CTC'S ONE AT A TIME. NO FUMES NOTED. INSPECTED FORWARD ACCESSORY CONPARTMENT, NO FUMES NOTED. ALL SYSTEMS CHECKED GOOD.