As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO L/H TRANSITION HAS MULTIPLE AREAS OF CORROSION BETWEEN STA 727+4" TO STA 727I+8". GROUNDED - YES. REMOVED CORROSION, TO BE OUT OF LIMITS IAW B737-900 SRM 53-00-53-1A-2 REPAIRED TRANSITION IAW B737-900 SRM 53-00-53-2R-5W:1.0 O:.040 R:.030 L:4.250 D:.010.