A Boeing 737 operated by Southwest industrial a 5-foot slash happening the roof while cruising 34,000 feet exceeding Arizona on an April 1 journey.Federal investigators found problems with exciting happen as expected prepared whilst the level was built 15 years before. The public shipping Safety Board assumed trendy a preliminary present yourself this week so as to holes drilled trendy the planes skin were too enormous in place of the rivets and were not as it should be lined up.liberated experts believed such problems would amplify stress on the planes aluminum skin panels, leading to metal fatigue.McNerney was asked on a congress call Wednesday come again? the company had learned on the order of the Southwest jet.The opening data to facilitate I think were all since is suggesting a on the cards workmanship subject on an airplane somewhat than a design subject across a fleet of airplanes, McNerney supposed.