As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED NO AIR CONDITIONING AND BURNING SMELL. FAN/AIR COND. SELECTOR SWITCH AND POWER WIRES FOR EVAPORATOR FANS NR 1 AND NR 2 BURNED. SUSPECT CAUSE DUE TO NR 1 EVAPORATOR FAN FAILURE LAST MONTH. WIRES AND SWITCH WERE HEATED, STARTING CORROSION CREATING RESISTANCE, BURNED SWITCH AND THEN FAILED. RECOMMEND INSPECTION OF THIS AREA AT EVAPORATOR FAN FAILURE.