As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN CIRCUIT BREAKER FOR CLEARVIEW & EYEBROW WINDOWS WAS PUSHED IN DURING FLIGHT, CONSIDERABLE ARCHING AND SPARKS CAME FROM CAPTAIN'S CLEARVIEW WINDOW BUY THE TERMINAL BLOCK. REPAIRED A BROKEN WIRE AT THE TERMINAL BLOCK AND REPLACED THE TERMINAL BLOCK IAW DC9 AMM 30-41-00-2.