What was found
30 MINUTES BEFORE LANDING, DETECTED AN ELECTRICAL BURNING ODOR THROUGHT ENTIRE CABIN. TURNED OFF PC POWER SYS IMMEDIATELY AND ODOR SLOWLY WENT AWAY. F/A COULD NOT PINPOINT WHERE THE ODOR WAS COMING FROM. AFTER TURNING PC POWER OFF, GEN 1, 3, 2, AND 4 LOADS WERE 65, 75, 95, AND 90 RESPECTIVELY. ACFT LANDED SAFETLY. MX PERFORMED TROUBLESHOOTING IAW FIM 21-20-00-810-801-A, BLOCK 1-6, 8-10, NO FAULTS FOUND. MX PERFORMED OPS TEST OF PASSENGER PC POWER STATIC INVERTER COOLING FAN IAW AMM 24-20-03-700-802-A. OPS CHECKED GOOD, NO DEFECTS NOTED. COULD NOT DUPLICATE.