As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO PIT L/H TRANSITION PANEL HAS MULTIPLE AREAS OF CORROSION THROUGHOUT FROM STA 727 TO STA 827. GROUNDED - YES. REMOVED CORROSION FROM AFT PIT LH TRANSITION PANEL. FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2. REMOVED AND REPLACED TRANSITION PANEL IAW B737-900 ER SRM 53-00-53-2R-5 W 1.0 O .040 R .000 L 2.0 D .040.