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ISS Rotary Joint Surprise

Spacewalkers make disturbing discovery: metal shavings inside solar wing joint, AP

“Spacewalking astronauts doing construction work outside the international space station Sunday made a disturbing discovery: what appear to be metal shavings inside a joint that is needed to turn a set of solar power panels. The rotary joint, 10 feet in diameter, has experienced intermittent vibrations and power spikes for nearly two months. Space station managers were hoping a thermal cover or bolt might be hanging up the mechanism, which would have been relatively easy to fix, and were disheartened when Daniel Tani radioed down that metal shavings were everywhere.”