As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN, FLOOR STRUCTURE, R/H INTERCOSTAL STA 967-STA 947.5 CORRODED ON MULTIPLE LOCATIONS. REMOVED & REPLACED R/H INTERCOSTAL IN THE AFT CABIN R/H SIDE AT STA. 947.5 TO 967 IAW B737-900 SRM 51-40-02-0G.(LOG 1638677 - AIRCRAFT WAS GROUNDED).