As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE: SEVERAL CORROSIONS ON FLOOR STRUCTURE WEB UPPER BTW FR 15-16 AND Y=.-320 TO Y=-930 LH SIDE; REF TOMX WO 2047 NR 00262. REMOVED AND REPLACED DOUBLE UPPER SURFACE BTW FR 15-16 Y=-320 TO Y=-930 LH SIDE REF SRM 51-41-02 AND 51-42-02.