What was found
DURING TAXI STRONG RUBBER BURNING SMELL IN THE COCKPIT AND CABING. AFTER TURNING OFF RECIRCULATING FAN, SMELL DISSIPATED.-C/A-REMOVED AND REPLACED BOTH RECIRCULATING FANS, THERMAL SWITCHES, AND AVIONICS BAY FANS. REMOVED AND REPLACED #1 EXHAUST FAN IAW AMM 21-26-02 ALSO REMOVED AND REPLAED #1 EXHAUST FAN THERMAL SWITCHES S0019 AND S0021 IAW AMM 21-26-04 OPS CHECK GOOD NO DEFECTS NOTED AT THIS TIME. REMOVED AND REPLACED CONTACTOR K0234OPTS CHECK GOOD IAW AMM 21-24-03 AND 21-20-00. REMOVED AND REPLACED RH CABIN RECIRCULATION FAN IAW AMM 21-24-01. OPS CHECK GOOD. A/C IS IN SERVICEABLE COND.