What was found
AFT WET AREA FR 86-87, STGR 27R-28R HAS 1(EACH) CORRODED INTERCOSTAL FWD OF AFT HOT DRAIN MAST. (C-CHECK RO 10/31/2022) / REMOVED AND REPLACED INTERCOSTAL BETWEEN FR 86-87, STGR 27-28R. REF SRM 51-40-08. DOES NOT EFFECT WEIGHT AND BALANCE OF AIRCRAFT.