As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT LOWER WING PLANK ACCESS HOLE NR 10 AT WS 188.040, 550BB HAS CORROSION AT INBD AND OTBD ENDS. INBD CORROSION MEASURES APPROX 1.3" LONG X .10" WIDE X .002" DEEP. OTBD CORROSION MEASURES APPROX 1.5" LONG X .11" WIDE X .002" DEEP. COMPLIED WITH ECTC EO 600-57-81, & REO 601R-57-21-030, REV H.