As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STARTER/GENERATOR TERMINAL BLOCK WAS SEVERELY BURNED AND DAMAGED FROM SEVERE ARCING TO THE POINT OF BURNING PAINT ON LOWER COWLING. TERMINAL BLOCK FELL APART WHEN TOUCHED. POSSIBLE CAUSE: ARCING FROM POWER TERMINAL TO BLOCK MOUNTING BOLTS INTERNALLY WITHIN THE BLOCK.