As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE C-CHECK, CORROSION WAS FOUND IN THE MLG BEAM AT NR 4 FLAP TRACK OUTBOARD ATTACH POINT. THE CORROSION WAS REMOVED AND IT WAS DETERMINED TO BE BEYOND LIMITS. INSTALLED OVERSIZED BUSHING PER BOEING IPC. THE REPAIR WAS CARRIED OUT IAW AIA ENGINEERING DEVIATION REPORT NR B2 06407 AND AIA NON-ROUTINE M40 53402. (X)