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 DISCOVERED ON EXTERNAL SKIN LOCATED UPPER SURFACE BTWN RIB1-2 ON LH WING; PERFORMED PERMANENT REPAIR LOC EXTERNAL SKIN BTWN RIB 1-2 UPPER SURFACE ON LH WING IAW EA 57-0384-18 REV.0 PART 1 & 2 / EC A18-990-01. THIS JOB MUST BE INSPECTED AT 80600FC/161300 FH. THIS THRESHOLD INSPECTION APPLIED FROM REPAIR EMBODIMENT. REF. AEROMAN NR 2018-395089 FOR DETAILS.