What was found
DURING THE BOARDING PROCESS, BOTH PILOTS DETECTED ELECTRONIC OVERHEAT ODOR. MAINTENANCE PERFORMED TROUBLESHOOTING USING REFERENCE TSM 24-00-00-810-823, ELECTRICAL BURNING SMELL OR FUMES FOUND IN THE CABIN, COCKPIT, CARGO, OR AVIONICS COMPARTMENT AND IDENTIFIED THE SMOKE ODOR COMING FROM THE NR 2 FLIGHT MANAGEMENT GUIDANCE COMPUTER. MAINTENANCE REMOVED AND REPLACED THE FLT MANAGEMENT GUIDANCE COMPUTER AND PERFORMED OPERATIONAL TEST, REFERENCE AMM 22-83-34 PB 401.