As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, SECONDARY NRC IN REF NRC 00427 -CORROSION WAS FOUND OVER STRG 28R BETWEEN FR 86/87 AT CF III INTERNAL STRUCTURE STRINGER 28R BETWEEN FR 86/87 AT CFIII INTERNAL STRUCTURE WAS REPAIRED PER EMB190 SRM 53-23-03 / REPAIR 51P.