What was found
DURING HEAVY MAINTENANCE, REF: SRM 53-41-11-300-004, DOSSIER 81769917, MX244. FOUND WITH CORROSION DAMAGE ON THE AFT LAV VENT AT FR 69-FR70 BETWEEN STGR31R AND STGR32R AFFECTING SKIN PANEL. REPAIRED, TRIMMING OUT THE DAMAGED AREA AND PERFORMING A HFEC INSPECTION OF THE AREA FOLLOWED BY THE INSTALLATION OF A DOUBLER IN THE AREA. SURFACE PROTECTION IS TO BE INSTALLED AS PER SRM. MAJOR REPAIR