As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A HEAVY MAINTENANCE CHECK, THE FLOORBOARD SUPPORT INTERCOSTAL AT STATION 1986 LBL 60 TO 71 WAS FOUND TO BE CRACKED AND CORRODED. REMOVED SUPPORT EXTRUSION MATERIAL ID SUPPORT AND FABRICATED IAW DAC DWG AGA7091. ALODINED AND PRIMED IAW DC10 SRM 512101 VOL 2. INSTALLED IAW DC10 SRM 513501 VOL 2.