As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE RECENT C-CHECK, THE UPPER CHORD AT BS 1840 WAS FOUND CORRODED BETWEEN LBL 75 AND 98 ON THE HORIZONTAL SURFACE AND EXTENDED DOWN ONTO THE VERTICAL SIDE. CORRODED SECTION WAS REMOVED, REPLACED AND REPAIR ANGLES WERE INSTALLED. REWORKED AREA EXTENDS FROM LBL 65 AND 105. REPAIR APPROVED PER BOEING TELEX. (M)