As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
***CORROSION*** AFT CARGO Z CHANNEL RBL 22 STA727B+3-757 WL156 / REMOVED AND REPLACED AFT CARGO Z CHANEL RBL22 STA 727A-767 WL156 PER SRM 51-40-02-0G-0 AND DWG# 146A7500 57903U 04DEC19 AFTER EVALUATION OF CORROSION ON AFT CARGO R/H Z CHANNEL FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 FIG. 103 DETAIL D