What was found
***CORROSION*** FWD CARGO BAY R/H Z-CHANNEL HAS CORROSION FROM STA 500C+10 TO 500F+10 RBL 24 WL 156 / CORROSION ON Z-CHANNEL AT STA 500C+10 TO 500F+10 RBL24 WL156 FOUND TO BE OUT OF LIMITS. REMOVED DAMAGED R/H Z-CHANNEL. LOCATED AND DRILLED NEW Z-CHANNEL ITEM #BAC1496-444 #7075T6 LOT #5084276-1 P.O. #745571. TREATED; PRIMED AND INSTALLED IRT SRM 53-00-53-1A-2 FIGURE 4.A(2)D. SRM 51-40-02-G-0; SRM 51-40-05-G-0 AMM 51-21-72-370-801 SRM 53-00-53-2R-5 BOEING DWG 143A7500 REV:A AND BOEING DWG 143A7501 REV A 57773U 10/5/19