As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE C-CHECK INSPECTION, FLOORBEAM BETWEEN FUSELAGE STATION 226 AND 270 WAS FOUND TO BE CRACKED. REPAIR OF THE FLOORBEAM WAS ACCOMPLISHED BY FABRICATING AND INSTALLING REPAIR DOUBLERS IN ACCORDANCE WITH FAA DER APPROVED SKETCH B68-R29 AND THE DOUGLAS STRUCTURAL REPAIR MANUAL.