What was found
WIRING HARNESS CUTOUTS IN STA. 110 AND 124 BULKHEADS ON THE RT SIDE OF THE FUSELAGE IS CRACKED IN THE EXTREME CORNER DUE TO IMPROPER REINFORCEMENT OF BULKHEADS AND FUSELAGE FLEXING IN FLIGHT. REMANFACTURE OF BULKHEAD WITH THICKER MATERIAL TO WITHSTAND IN FLIGHT STRESS OR ENSURE THAT BULKHEAD IS PROPERLY SUPPORT TO PREVENT FLEXING OR CHANGE THE CUTOUT SHAPE FOR THE WIRING HARNESS SO THAT IT IS LESS SQUARE PREVENTING AN AREA OF CONCENTRATED STRESS.