As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON COUNTERSINK AT RT WING FUEL TANK ACCESS PLATE 1456C. CORROSION ON COUNTERSINK HOLES AT ACCESS PLATE NR 1456C WAS REMOVED AND MEASURED. MAX DIAMETER ALLOWABLE IS 0.532" AND MAX DIAMETER MEASURED ON 3 ADJACENT HOLES IS 0.580". THEREFORE ITS OUT OF LIMITS IAW SRM 51-22 -2A AND WAS REPLACED.