As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3819 - PSM-PWM - AFTER TAKEOFF, THE CREW NOTICED A ONE AMP CIRCUIT BREAKER POPPED WITH SMOKE EMITTING FROM THE CIRCUIT BREAKER PANEL. THE AIRCRAFT RETURNED TO PSM LANDING WITHOUT INCIDENT. MAINTENANCE WAS DISPATCHED TO THE AIRCRAFT AND FOUND THE ALTITUDE ALERTER TO BE DEFECTIVE. MAINTENANCE REMOVED AND REPLACED THE ALTITUDE ALERTER AND THE CIRCUIT BREAKER AND RETURNED THE AIRCRAFT TO SERVICE. (M)