As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRIC SMOKE IN COCKPIT DURING CLIMB. CAPTAIN TURNED OFF "ENG GEN" AND TURNED ON EMERGENCY POWER. STILL SMELLED SMOKE WITH EMERGENCY POWER ON. PERFORMED COM PROCEDURES, DECLARED AN EMERGENCY, AND RETURNED TO STL AND LANDED WITHOUT INCIDENT. FOUND AUTO GROUND SPOILER ACTUATOR TO BE THE CAUSE OF SMOKE AND FOUND CIRCUIT BREAKER B1-243 FAULTY. REPLACED CIRCUIT BREAKER. OPERATIONAL CHECK GOOD.