As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE CORROSION WAS FOUND ON FRAME 80 (P/N 170-65422-003) AT S-28R. THE CORROSION WAS BLENDED OUT WITH A MAXIMUM DEPTH OF .066" FROM A NOMINAL THICKNESS OF .118" WHICH IS OUT OF LIMITS. THE CORRODED FRAME WAS REMOVED AND REPLACED WITH A NEW FRAME PER EO E175-53MR-417.