Repairs can cover and conceal evidence of structural weakening Fatigue damage under patches known as doublers can be deadly, and an expanded hunt must be mounted to find spreading cracks before they cause a catastrophe. That is the central message in a battery of recommendations issued April 8 by ...
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"This is a dangerous precedent," says Jim Hall, former Safety Board chairman By appointing the team to investigate the fatal Feb. 1 crash of the space shuttle Columbia, the action of the National Aeronautics and Space Administration (NASA) is analogous to an airline appointing the panel ...