As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PHASE 5 INSPECTION, FOUND LT WING CUFF TKS PANEL PRESSURES SWITCH BADLY CORRODED AND METAL EXFOLIATED ON THE SURFACE OF THE SWITCH. SUBMITTER STATED POOR QUALITY OF METAL USED IN MAKING SWITCH BODY WITH POSSIBLE TKS FLUID LEAKAGE LIKELY CAUSE.