As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CRACKS WERE FOUND. REFER EC A18-414-01. FUSELAGE/ CENTER FUSELAGE/ ALI 521110-01/ FR16LT & FR20LT FASTENER HOLES/ MULTIPLE CRACKS- PERMANENT REPAIR; APPROVED THIS REPAIR PER REF /3/ RDAS AND IS CLASSIFIED AS MAJOR CATEGORY 'B'.