As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE: CORROSION LOWER SILL LOC. FR68 AT LEVEL STR 23L AT AT GALLEY AREA. PERFORMED PERMANENT REPAIR ON LOWER SILL LOCATED AT LEVEL OF FR68 AND STRG 23L AT AFT GALLEY AREA IAW A321 SRM 53-41-14-300-001 STEP 2.A FIGURE 001 (SHEET 1, SHEET 3 AND SHEET 9) REPAIR PRINCIPLE 5."