What was found
INTERMITTENT ELEC ODOR DURING CRUISE FLIGHT, ODOR WAS ASSOCIATED WITH COCKPIT AREA ONLY & DECREASED IN INTENSITY AT LWR ALTITUDE. INSPECTED AREA FOR ODORS IN AVIONICS BAY, JUNCTION BOX 1 AREA, COCKPIT, THROUGH BAY & AFT EQUIPMENT BAY. NOTHING UNUSUAL NOTED. RAN AIR CONDITIONING PACKS, BOTH DISPLAY COOL FANS, BOTH ARINC FANS & WINDSHIELD HEATS. NO DEFECTS NOTED. MDC SHOWED NO FAULTS & NO CIRCUIT BREAKERS FOUND TRIPPED. UNABLE TO DUPLICATE PROBLEM.