What was found
CORROSION ON COUNTERSINK AT WING ACCESS PLATE NR 1357C. SM, CARD 407, ZONE 100. CORROSION WAS REMOVED, COUNTERSINK WERE MEASURED AND MAXIMUM DIAMETER ALLOWABLE IS .532" AND WERE FOUND 2 COUNTERSINKS OUT OF LIMITS, MEASURED .539" AND .539" THEREFORE HOLES AND COUNTERSINKS WERE REWORKED AND MEASURED 1, 1.0 .329" COUNTERSINK .617" NR 2, 1.0 .330" COUNTERSINK .605" , BUSHINGS WERE FABRICATED WITH OD NR 1 .330 AND COUNTERSINK .511" NR 2, OD. .3305" AND COUNTERSINK .512" AREAS AND BUSHINGS WERE TREATED AND BUSHINGS WERE INSTALLED IAW SRM 51-22-2A, COND II AND 51-10-3. TOOL USED GAGE, PN 1127, S/N 55759 D/D 23-MAR-16.