What was found
CORROSION ON COUNTERSINKS AND SETTLEMENT AREA OF FUEL ACCESS DOOR 520DT AT LT WING. CORROSION AT FUEL ACCESS PLATE 520DT ON COUNTERSINK WAS REMOVED, MEASURED AND FOUND OUT OF LIMITS WITH 3 ADJACENT HOLES DIAMETER MAX 0.619IN, 0.672IN AND 0.694 IN IAW SRM 57-10-01 AND ACCESS PLATE WAS REPLACED IAW SRM 57-10-01 IN TO CONDITION 2. TOOL USED, PN 1127, SN 60555.