As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING STRUTS HAD FILLED WITH WATER FROM SITTING OUTSIDE. RUST STAINS VISIBLE FROM OUTSIDE OF STRUT. WHEN POKED WITH AN AWL IT PUSHED A HOLE INTO STRUT AND DRAINED WATER. DRILLED A .0312 HOLE IN BOTTOM OF OTHER 3 STRUTS AND WATER CAME OUT IN EXCESS OF 1 CUP EACH. OWNER NOTIFIED OF UNAIRWORTHY CONDITION.