What was found
FUSELAGE SKIN HAS A 1.25" CRACK UNDER THE NR 3 VHF ANTENNA. FOUND WHILE ACCOMPLISHING HFEC INSPECTION AT BS 727D, LBL1-RBL1. WL.148. REMOVED ALL FASTNERS COMMON TO SB B737-53-1287. FABRICATED REPAIR DOUBLER AND TRIPLER FROM 2024-T3 0.071 PO AVIM15101500030 AND A 2024-T3 FILLER FROM 0.063, PO AVIA15062400021 IAW SB 737-53-1287, FIG 20. CUT OUT CRACKED CONDITION AND PREFORMED A HFEC INSPECTION IAW SB 737-53-1287 AND DWG 65C37049-3 FABRICATED, LOCATED, DRILLED AND DEBURRED ALL REPAIR PARTS IAW SB 737-53-1287 AND DWG 65C37049-3. ALODINE AND PRIMED REPAIR PARTS IAW SRM 51-20-01. INSTALLED REPAIR IAW SB 737-53-1287 DWG 65C37049-3AND SRM 51-40-02.