As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 0321559) CORROSION ON EQUIP COOLING OVERBOARD EXHAUST VALVE DOUBLER STA 360+3-360+16 STR 28L. REMOVED AND REPLACED DOUBLER DAMAGED ON EQUIP COOLING OVERBOARD EXHAUST VALVE STA 360+2-380+4 STR 28L PER B737-800 DWG 143A3233 REV. F AND SRM 51-40-02-0G.