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 OF THE UPPER AFT FUSELAGE EXTERIOR PLATING, A CRACK WAS IDENTIFIED AT FUSELAGE STATION 1559, LONGERON 17 RIGHT. THE CRACK WAS REMOVED BY CUT OUT. THE REPAIR FILLER AND EXTERNAL DOUBLER WERE FABRICATED AND INSTALLED IAW THE DOUGLAS STRUCTURAL REPAIR MANUAL 53-2-1. (M)