What was found
FWD CARGO PIT AFT OF DOOR TRANSITION/Z ANGLE, AT STA 500A HAS CORROSION MARKED. GROUNDED - YES. REMOVED CORROSION FROM FWD PIT AFT SHIELD IAW B737-800 SRM 53-30-15-1A-1, ORIGINAL THICKNESS 0.032 IAW B737-800 SRM 53-30-15-01-1, REMOVED 0.015, REMAINING THICKNESS IS 0.017 FOUND TO BE OUT LIMIT IAW B737-800 SRM 53-30-15-1A-1, REMOVED AND REPLACED IAW B737-800 SRM 51-40-02, BOEING DWG 143A8126 REV: A.