As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PIT RH SIDE DOOR CUTOUT SHIELD PANEL HAS POSSIBLE CORROSION IN (5EA) SCREW HOLES AND UNDER NUTPLATES AT BETWEEN STA 787 TO 767 CIRCLES IN RED. GROUNDED - YES. REMOVED AND INSTALLED A NEW SHIELD PANEL AT AFT PIT R/H SIDE DOOR CUTOUT APROX STA 787 TO 767 IAW B737-900 SRM 51-40-02 AND BAC DWG # 146A0081 REV A CORROSION WAS 100% LOSS AT LOWEST POINT.