As recently as February of this year, weight issues made flights tail hit the runway: https://www.google.com/amp/s/news.yahoo.com/amphtml/software-bug-caused-tw

As recently as February of this year, weight issues made flights tail hit the runway: https://www.google.com/amp/s/news.yahoo.com/amphtml/software-bug-caused-two-alaska-010000035.html https://www.google.com/amp/s/news.yahoo.com/amphtml/software... > a software glitch was responsible for the incident. According to the Seattle Times, the tailstrikes occurred largely as the result of a bug in a program sold by a Swedish firm called DynamicSource. The program is supposed to deliver “crucial weight and balance data” that pilots enter into their flight computers to help determine stuff like “how much thrust the engines will provide and at what speed the jet will be ready to lift off.” In this case, the tool delivered faulty data that “seriously undervalued [the] weights for the airplanes.”