As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN AT STA 1136 .091 FLOOR SUPPORTS ON LEFT AND RIGHT SIDES APPROXIMATELY 12" FROM BL 0 ARE CRACKED AT FWD O/B SIDES. REMOVED AND REINSTALLED CABIN FLOOR SUPPORTS ON LEFT AND RIGHT SIDE STA 1136.091 IAW DC9 SRM 51-30-1 PG 1. REPAIRED CRACKS IAW DC9 SRM 53-01 PG 13 FIG 1 SHEET 4. STOP DRILLED CRACKS. HFEC PER NDTSPM 06-10-01.0001 NO DEFECT NOTED. FABBED AND INSTALLED DOUBLERS IAW DC9 SRM 53-01 PG 13 FIG 2 SHEET 4.