What was found
AFT CARGO PIT LEFT FRAME CHANNEL STA 787 LBL 30 WL 160 HAS CORROSION AROUND FASTENER HOLE / BLENDED DAMAGE AT AFT CARGO PIT LEFT FRAME CHANNEL STA 787 LBL 30 WL 160 AROUND FASTENER HOLE IAW B737 SRM 51-10 -02-0G-0 AND SRM 53-00-0 7- 1A-1 FIG 102 DETAIL C. VERIFIED WITH 10X MAG. CHECKED AND VERIFIED LIMITS. ORIGINAL MATERIAL THICKNESS .063'. REMAINING MATERIAL .050'. FOUND TO BE OUT OF LIMITS IAW B737 SRM 53-00-07-1A-1 FIG 102 DETAIL C / TOOL ID # AAR 36646 / CAL DUE 02 OCT 19. REMOVED DAMAGED FRAME CHANNEL & INSTALLED NEW FRAME CHANNEL P/N 146A9403U89 A TAG A22285 IAW B737 SRM 51-40-02-0G-0 & DWG 146A9403. APPLIED CIC TO FRAME CHANNEL IAW B737 SRM 20-41-05.