As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SERVICE DOOR SURROUND STRUCTURE LOWER SILL HAS MODERATE CORROSION LOCATED BETWEEN FS 349 AND FS 364 ON UPPER AND LOWER SURFACES. WORST AREA IS AT FWD NUTPLATE HOLE AND MEASURES APPROX 1.8" DIA X .005" DEEP ON TOP SURFACE AND .7 DIA X .002" DEEP ON LOWER SURFACE. REPAIRED IAW REO 601R-53-61-1303, REV.