As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CONVOLUTED FIN STOCK IS BONDED INTO PLACE AS A 'HEAT SINK' IN THE BATTERY CHARGER. THE STOCK CAME LOOSE AND AS THE TECHNICIAN WAS CHECKING SOME COMPONENTS IT CAME IN TOUCH WITH A POWERED TRANSISTOR CAUSING A SHORT. ARCING OCCURRED. SEVEN OTHER UNITS WERE FOUND WITH THE SAME PROBLEM OF A LOOSE FIN STOCK.