What was found
MAIN CABIN FR68 CORRODED AROUND ANCHOR NUT ABOVE STGR. 23R. GROUNDED - YES. REMOVED AND REPLACED NUT PLATE ON FR 68 AT STR 23R AND BLENDED CORROSION AT NUT PLATE HOLE IAW A320 SRM 53-41-12-283-001 FIG 2 SHEET 1 AND FOUND TO BE IN LIMITS. BLEND OUT IS L=2.3" W=1.3" MATERIAL LOSS IS .009" ORIGINAL THICKNESS .098" REMAINING IS .089" MAX ALLOWABLE LOSS IS .020" REPAIR IS CAT B INSPECTION THRESHOLD 60,000 FC INSPECTION METHOD DET RESTORED ALL PROTECTIVE FINISHES IAW A320 SRM 51-42-11 AND 51-75-12.