What was found
DURING ROUTINE C-CHECK INSPECTION, A CRACK WAS DETECTED ON THE FUSELAGE STATION 1660 LONGERON 11L UPPER AFT CORNER ON THE AFT ENTRY DOOR CUTOUT. REPAIR ACCOMPLISHED, REMOVED DAMAGE, FABRICATION AND INSTALLATION OF REPAIR FILLER, DOUBLER AND TRIPLER IN ACCORDANCE WITH THE DOUGLAS STRUCTURAL REPAIR MANUAL.