Ifly 737 Max — Crack Verified Patched

The origins of these cracks were traced back to a specific manufacturing process. Boeing identified that a supplier, Spirit AeroSystems, had improperly drilled holes in the fittings that attach the bulkhead to the fuselage. Specifically, the issue involved the improper application of "smart wiring"—a technique meant to ensure holes were correctly spaced and aligned. When these holes were drilled incorrectly, they created stress concentrators. In engineering terms, a small imperfection in a material can lead to a disproportionate amount of stress at that single point, acting as the seed from which a crack grows. Consequently, what began as a manufacturing defect evolved into a structural failure under the operational stresses of flight.