As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING BC4 CHECK DISCOVERED LEVEL 2 GALVANIC CORROSION ON THE LOWER SILL, RT SIDE OF CABIN, AT FR 66 AND Y-1732. MAINTENANCE REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW SRM 53-41-14. FABRICATED ANGLE AND FILLERS IAW SRM 53-41-14. INSTALLED FABRICATED REPAIR PARTS AT LOWER SILL FR 66 AND Y-1732 IAW SRM 53-41-14 REPAIR NO. 6 FIG 201.