As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO INTERCOSTAL CORRODED STA 727A TO 727B RBL 20. GROUNDED - YES. REMOVED CORROSION ON INTERCOSTAL STA 727A-727B RBL 20 AND FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-00-53-1A-2 REMOVED AND REPLACED INTERCOSTAL IAW B737-800 SRM 51-40-02-0G-0 W= 2" O= .032" L= 1" D= .012.