What was found
FUMES (NO FIRE) SMELLED IN COCKPIT AND CABIN DURING CRUISE. ALL FLT CREWS AGREE ELECTRICAL. IDENTIFIED SOURCE OF FUMES ODOR TO BE COMING FROM NR 1 T/R UNIT. CHANGED BOTH TRANSFORMER/RECTIFIER UNIT & MAIN BATTERY CHARGER AS PRECAUTIONARY. IAW AMM 24-32-11-400-801 & 24-31-21-400-802-2 ALL INSPECTIONS COMPLETE PER 05-51-26-200-801C1. OK TO CONTINUE ROTABLE PARTS CHANGE WAS INDICATED - TT # 1384452 SN OFF 01943 TT # 1384991 SN OFF 02237 CHARGER, BATTER OFF 29-2431-9-0002 1943 ON 29-2431-9-0002 1729 TRANSFORMER, RE OFF 29-2421-9-0001 2237 ON 29-2421-9-0001 0543.