What was found
AFT PIT DOOR SURROUND FWD SHIELD HAS CORROSION.TIPR833K. GROUNDED - YES. REMOVED CORROSION FROM THE AFT PIT DOOR SURROUND FWD SHIELD PER B737-800 SRM 53-60-15-1A-1.2.A. ORIG THICKNESS IS .050" PER B737-800 SRM 53-60-15-0I-1 TABLE 4. REMOVED .020", REMAINING THICKNESS IS .030" AND IS FOUND TO BE OUT OF LIMITS PER B737-800 SRM 53-60-15-1A-1.4.H.(2). REMOVED AND REPLACED AFT PIT DOOR SURROUND FWD SHIELD PN: 146A8127-12 PO: 1054886.5 IAW B737-800 SRM 51-40-02 & SRM 51-40-05.