What was found
DURING HEAVY CHECK MAINTENANCE FOUND CORROSION AFT WET AREA GUSSET AT FR90 RBL 24" AS MARKED. REMOVED, REPLACED AFT WET AREAS GUSSET AT FR90 RBL 24'' AND APPLIED SURFACE PROTECTION TO AFT WET AREA GUSSET AT FR90 RBL 24" REF SRM 51-40-08, 51-23-04, 51-23-05, 51-23-06. A/C REMAINS IN CHECK.