As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRAME 349.00 FROM STGR 25L TO 25R HAS MULTIPLE SPOTS OF CORROSION. C-CHECK RO 1/16/2021. INSTALLED NEW FRAME AT FS 349 FROM STR 25L TO 25R, IAW SRM 51-42-06, 51-42-21. TASK CARD 51-900-1003-SKY COMPLETED. FORM M-337 ATTACHED, NO WEIGHT AND BALANCE CHANGE.