As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) A PORTABLE INVERTER WAS USING THE AIRCRAFT''S 28 VOLT SUPPLY TO POWER A LIFEPACK DEFLIBRILLATOR/MONITOR 120 V AT 3.5 AMPS. DURING CLIMB, THE PARAMEDIC ADVISED THE FLIGHT CREW OF SMOKE IN THE CABIN. THE PARAMEDIC DETERMINED THAT THE CAUSE OF SMOKE WAS THE PORTABLE INVERTER. FOLLOWING DISCONNECTION, ALL SMOKE GENERATION CEASED. IT APPEARS THAT THE SILICON RECTIFIER SHORTED.