As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A/C CONVERSION, MAINTENANCE DISCOVERED CORROSION AT FIVE LOCATIONS ALONG THE LOWER MAIN SILL OF THE FWD LWR CARGO DOOR JAMB SPANNING FROM STA 500TO 632 RBL 42. THE CORROSION WAS REMOVED FROM EACH LOCATION PER SRM 53-00-15 FIG 101 EXCEEDING PUBLISHED LIMITS.