As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL INSPECTION, FOUND LEFT REAR WING ATTACH FITTING CORRODED AND WATER STANDING IN FUSELAGE. REMOVED FITTING AND CLEANED CORROSION. LOWER .5 INCH WAS CORRODED APPROXIMATELY 20 PERCENT OF THICKNESS OF PART. REPLACED WITH NEW FITTING IAW PIPER SB 977. SUBMITTER RECOMMENDS THIS SB BECOME AN AD DUE TO FREQUENCY OF PIPER AIRCRAFT WITH THIS PROBLEM.