What was found
MAINTENANCE REPORTED LEVEL 2 CORROSION IN THE AFT WET AREA, FLOOR SUPPORT INTERCOSTAL AT FR89-FR90, RBL10. MAINTENANCE REMOVED AND REPLACED THE AFT WET AREA INTERCOSTAL PANEL SUPPORT AT FR89-FR90, RBL10 IAW E170 SRM 51-43-03, 51-40-02 AND 51-40-03.