As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY CHARGER FAULT AND CB TRIP MESSAGES WHILE SITTING AT GATE, BURNING SMELL IN COCKPIT AND FORWARD CABIN. OPENED MID E& E -FOUND STRONG BURNT ELECTRICAL SMELL. REPLACED #2 BATTERY CHARGER PER A220 AMP 24-32-02. TEST PASSES. MSI WORK CARDS 0550-2001 AND 0550-2003 C/W ON LOG 8740269. (LP# 8740268; AIRCRAFT WAS GROUNDED)