As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*** CORROSION*** FLIGHT DECK BETWEEN STA 259.5 AND STA 270 ; WL 208 ; LBL2 TO RBL2 INTERCOSTAL SUPPORT CHANNEL HAS CORROSION. REMOVED AND INSTALLED NEW INTERCOSTAL UPPER CHANNEL ON FLIGHT DECK BETWEEN STA259.5 AND STA 270 WL 208; LBL 2 RBL2 AS PER B737-700 SRM 51-40-02-0G-1 AND DRAWING #141A5210.