As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THERE ARE TWO PIN HOLES MOST LIKELY CAUSED BY CORROSION ON LT FWD OMEGA BEAM BETWEEN FRAME 15 & 16. C-CHECK CLEANED OUT CORROSION HOLES, INSTALLED PLUG RIVETS & APPLIED SURFACE FINISH ON TWO PIN HOLES IN LT FWD OMEGA BEAM BETWEEN FRAME 15 & 16 IAW ETD.