As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A MAINTENANCE VISIT FOUND CORROSION DAMAGE TO FLOOR SUPPORT FRAME HAT CHANNEL BETWEEN Y=1745 TO Y=1766 AND LONGERON 21 LEFT. DAMAGE EXCEEDED LIMITATIONS IAW DC-8 SRM. REMOVED DAMAGE, TREATED AREA IAW DC-8 SRM 51-1-8. FABRICATED AND INSTALLED NEW HAT CHANNEL IAW DC-8 SRM 51-3-0.