As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 0577383) CORROSION ON FWD CARGO R/H Z CHANNEL FROM STA 500A TO STA 500L WL158. REMOVED FWD CARGO R/H ZEE CHANNEL STA 500A-500L AND REPLACED WITH NEW FAB IAW B737-900 SRM 53-00-53-2R PROCEDURE 5, 51-40-02-0G SEC. 4.E. FIG 8 AND 4.B. (1-2) AND BOEING DWG# 143A7500.