What was found
(LOG 0032587) CORROSION ON AFT CARGO COMPARTMENT L/H Z CHANNEL STA 727 TO STA 727I. LBL 25 WL 158. REMOVED AND REPLACED ZEE CHANNEL STA 727-727I+8 LBL 25 WL 158 IAW B737 SRM 51-40-02, B737 SRM 53-00-53-2R PROCEDURE 5, B737 SRM 51-40-05-0G, B737 AMM 51-00-58-201, B737 AMM 51-21-72-370-801 AND BOEING DRAWING# 146A7500.