What was found
DURING CHECK-C MAINT IN THE AFT CABIN AND CARGO BIN, THE FORMER RING WAS CORRODED AT STA 1271, LONGERON 27L TO 29R. INSTALLED NEW Z FRAME FROM LBL 37 TO RBL 11, PER SRM 53-02, FIG 2.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING CHECK-C MAINT IN THE AFT CABIN AND CARGO BIN, THE FORMER RING WAS CORRODED AT STA 1271, LONGERON 27L TO 29R. INSTALLED NEW Z FRAME FROM LBL 37 TO RBL 11, PER SRM 53-02, FIG 2.