What was found
DURING D-CHECK, FUSELAGE SKIN AT STR 4L FROM STA 400 TO STA 420 IS DAMAGED. REMOVED FASTENERS PER SRM 51-30-2. CUT OUT DAMAGE AREA AND INSTALLED DOUBLER 2024-T3.050 13 INCH BY 9 INCH PER SRM 53-30-3, FIGURE 14, PRC EDGES PER SRM 51-20-4. TAT: 53,881.4 HRS. TAC: 36,380.