As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEFECT 723485: 3R WINDOW SPARKS AND ARCHING OBSERVED ON THERMAL SWITCH. - - RESOLUTION: FOUND EVIDENCE OF R3 THERMAL SWITCH IMPROPERLY SEATED INTO CLIP AND CAUSED ARCHING RESEATED THERMAL SWITCH REF AMM 30-41-31 AND OPS CHECK GOOD THIS CLEARS MEL 30-11-4 MDDR # 127486