As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-4 CHECK INSPECTION, FOUND FORWARD ENTRY DOOR CORROSION ON SECOND FRAME FROM BOTTOM AFT LOWER CORNER INSIDE. REPAIRED FRAME IAW DC-8 SRM 52-2-0 FIGURE 2. TREATED AND PRIMED. C-4 CHECK WORK CARD NR 3043, NON-ROUTINE TASK CARD NR 87497.