What was found
DURING "C" CHECK IN SAT, CENTER CARGO DOOR CUTOUT AT FS 1781 BELOW STR 42 AT EXISTING REPAIR DOUBLER AND EXISTING A/C SKIN STRUCTURE HIT AND PUSHED INTO FRAME 1781 (LOWER T/E OF DOOR CUTOUT). REMOVED HEATER TUBES FROM AFT TQ BOX FS 1781-1787 BETWEEN 538R-542R IAW SRM 51-31-01 TO FOM. REMOVED FLOOR SILL WITH ROLLER AT FS 1781-1793 RBL60 IAW SRM 51-31-01 TO FOM. REMOVED EXISTING REPAIR DOUBLER IAW SRM 51-33-01 2 DOUBLERS AND 1 FILLER, BLENDED DAMAGED AREA AT AFT SECTION OF CARGO DOOR CUTOUT IAW SRM 53-50-00 FIG 26 SHEET 1 AND 2. REMOVED LWR AFT LWR CORNER DOUBLER AND TRIPLER FOR FOM IAW SRM 51-33-01; HFEC PER NDT SPM 06-10-01.001. NO CRACKS NOTED. OK TO FAB`D DOUBLERS AND INSTALL PER EA 010-5350-11-A0296.