As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:D, MAIN CABIN BELLFRAME HAS 1 HOLE WITH NO E.D. AND 5 DRILL STARTS FS 1240 L-21L TO L-7L. BLENDED AREAS IAW SRM 53-2-0, FABRICATED AND INSTALLED FRAME AND SPLICES FROM L-18L TO L-21L IAW SRM 53-2-0 AND DHC SK-894-702-1 (REF UPS ENRG FILE NR DC8-53-1818).