What was found
CORROSION ON RAIL AT AFT CARGO BAY BS767+6 RBL8. ; / [01] VERIFIED APPLICABILITY OF SRM 53-60-53-0I-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE; [02] REMOVED CORROSION ON RAIL AT AFT CARGO BAY BS767+6 RBL8.MEASURES:L=1.300';W=0.900';D=0.030'; ORIGINAL THICKNESS:0.063';MATERIAL LOSS=0.030'; REMAINING THICKNESS OF MATERIAL=0.033'. THE RAIL IS OUT OF LIMITS. IAW. SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2 STEP 4.(2)(A). TOOL USED: DIGITAL CALIPER ID ATS2500; DUE DATA 03/2022; 05] CUT OUT THE DAMAGED THE UPPER FLANGE OF THE CARGO TRACK 3.3X.9 INCH PER SRM 53-00-53-2R-3 FIG 202 STEP 4B(1)(B). [07] HFEC INSPECTED CUT OUT IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23; NO CRACKS NOTED. EQUIP USED: NORTEC 600 ID: ATS1465; [08] RECEIVED REINFORCING CHANNEL SPLICE FROM MACHINE SHOP ON CUSTOMER RO # 825613 ; AFTER BEING MACHINED TO FIT AND PENETRANT INSPECTED . MATERIAL USED BAC1510-1355 ; 7050-T76511 EXTRUSION LOT# 1458838-1 ; FABRICATED ; LOCATED AND DRILLED IAW SRM 53-00-53-2R-2 OK TO TREAT AND PRIME; [10] APPLIED A CHEMICAL CONVERSION COATING AND PRIMER TO REINFORCING CHANNEL SPLICE AND REWORKED AREAS IAW SRM 51-20-01 AND SOPM 20-41-02 OK TO INSTALL; [11] VERIFIED CORRECTIVE ACTION ITEM 10. OK TO INSTALL NEW REINFORCING CHANNEL SPLICE GIVEN.; [12] INSTALLED THE REINFORCING CHANNEL SPLICE AT ACB RAIL BS 767+6 RBL8 IAW SRM 53-00-53-2R-2 REPAIR 2;