As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT 13 FLOOR PANEL WITH CORROSION. UPON FURTHER EVALUATION FOUND PANEL TO BE EXFOLIATED AND CRACKED REMOVED 9 EA HAT CHANNEL FROM FLOOR PANEL 13, (1 EA) HAT CHANNEL FOUND TO BE CRACKED PER DC9 51-30-2. FABBED PANEL AND 1 EA HAT CHANNEL PER DC9 SRM 53-23-0 TREATED AND PRIMED PER DC9 SRM 51-10-3 PARA 31 PARA 14 AND PARA 21 PAGE 40. INSTALLED 9EA HAT CHANNELS ON FLOOR PANEL 13 AND ANGLE PER DC9 SRM 51-30-2 PG 2 FIG 1.