As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO PIT R/H TRANSITION PANEL HAS MULTIPLE AREAS OF CORROSION FROM STA 727 TO STA 767. GROUNDED - YES. REMOVED CORROSION FROM AFT PIT R/H TRANSITION PANEL FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2. REMOVED AND REPLACED TRANSITION PANEL IAW B737-900ER SRM 53-00-53-2R-5. W:4.6" O:.040" R:0.0" L:2.4" D:.040".