As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MX INSP FOUND THE LT WING INBD WATER DRAIN VALVE BOTH WITH CORROSION. THE ACFT WAS REMOVED FROM SERVICE. CLEANED AND TREATED CORROSION AT LT WING INBD WATER DRAIN VALVE IAW SRM 51-21-42. NO MATERIAL REMOVED. THE ACFT WAS RETURNED TO SERVICE.