What was found
ORD - AFTER TAKEOFF, SMOKE AND FUMES FROM BEHIND F/E. PULLED RADIO PRIMARY CIRCUIT BREAKER AND SMOKE AND FUMES WENT AWAY. REF: PREVIOUS WRITE-UP 07. REPLACED PANEL AND INSTALLED RADIO PRIMARY CIRCUIT BREAKER AND VARIABLE CONTROL TRANSFORMER. CHECKED ALL CENTER PANEL LIGHTS FOR ONE HOUR AND CHECKED BEHIND B-18 CIRCUIT BREAKER PANEL. ALL CHECKED NORMAL.