As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN THE PROCESS OF COMPLYING WITH SB 53-159, BELLY SKIN REPLACEMENT STRINGER P/N 65-56441-8 WAS FOUND CORRODED ALONG TOP SIDE. STRINGER WAS REPAIRED. SUBMITTER STATED CAUSE OF CORROSION WAS EITHER MOISTURE BUILD-UP OR LACK OF FINISH ON THE PART.