As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO : LEFT HAND TRANSITION PANEL FROM STA 727 TO STA 847 HAS VARIOUS SPOTS OF CORROSION. SPOTS CIRCLED IN RED GREASAE PEN. GROUNDED - YES. REMOVED CORROSION.ORIGIONAL THICKNESS .040"MOST MATERIAL REMOVED .013".REMAINING THICKNESS .027". FOUND TO BE OUT OF LIMITS.REMOVED DAMAGED TRANSITION PANEL.FABRICATED, LOCATED, DRILLED REPAIR PARTS P/N BAC.1496-377 7075-T62 PO 1060011.1. APPLIED ALODINE, PRIMER AND INSTALLED REPAIR PARTS IAW B737-900 SRM 53-00-53-1A-2 AND SRM 53-00-53-2R-5