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[i]Sometime prior to ingress into the lunar module, the window of the range/range-rate meter broke. Upon ingress, the crew saw many glass particles floating in the spacecraft, presenting a hazardous situation ... A surface flaw deeper than the threshold depth for the glass operating stress must have existed on the outside of the meter window at launch. The flaw started growing as the cabin depressurized during the launch phase, and finally grew large enough for the glass to break. For future missions, an exterior glass doubler will be added ... In addition, all similar glass applications in the lunar module and command module were reviewed and changes are being made.[/i]
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