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 BETWEEN FASTENER HEADS ON LT WING TOP SKIN PANEL UPR SURFACE AT RIB 19 +3 AND 4.92" AFT OF FRONT SPAR; CORROSION REWORKED IAW SRM 57-21-11-283-014 REV 122. WORK ACCOMPLISHED ON LHT NR 5000761256-0010