Russian aviation authorities have grounded the country’s fleet of its newest model of civilian airliner, the Sukhoi Superjet 100. Metal fatigue, a problem usually associated with older airplanes, was discovered in the tail section of a new Sukhoi plane, the Russian regulator Rosaviatsia said Friday. The grounding was the latest setback for the Russian jet, … Continue reading Russia grounds the Sukhoi Superjet SSJ100 over safety concerns