![]() Peyton said that many flight crews that day had notified dispatch to let them know they felt the DynamicSource data on the weight was off. 'At that point, two in a row like that, that’s when I said, "No, we're done." That's when I stopped the thing,' Alaska's on-duty director of operations Bret Peyton told the Seattle Times about hearing about two scrapings six minutes apart. The reason that both flights returned was so that the aircraft's 'tail skid,' a piece of hardware on the back of the plane designed to absorb impact, could be inspected by safety crews. The ground stop lasted for around 22 minutes. Of the 727 Alaska flights that took off that day, only 30 had incorrect data and only two scraped their tails However, the passengers did not notice that anything had occurred, an Alaska Airlines spokesperson said. Of the 727 Alaska flights that took off that day, only 30 had incorrect data and only two scraped their tails.ĭespite the miscalculation, both flights were well within safety limits, Alaska Airlines said.ĭuring take off, both the pilots and flight attendants heard the scraping sound. The result was that both pilots ended up using less power than required to take off and both rotated too early. ![]() That morning, DynamicSource had undergone a software update that caused a bug, meaning that the pilots believed the planes were 20,000 to 30,000 pounds lighter than they actually were. ![]() The Times report says that the Alaska Airlines planes use a Swedish software brand named DynamicSource to determine how much power needs to be used for take off, based on the weight of the plane. ![]() The second plane, Alaska Flight 887, a 737-900ER, departed Seattle headed for Honolulu at 8.54am, but after also suffering the scraping, the captain made the decision to bring that plane back to the airport, landing at 9.45am. The captain made the decision to bring the plane back to the airport after the scraping, landing safely at 9.26am. The first flight, Alaska Flight 801, a 737 Max9, departed Seattle at 8.48am bound for Kona, Hawaii. Alaska Airlines planes reportedly use a Swedish software brand named DynamicSource to determine how much power needs to be used for take off, based on the weight of the plane ![]()
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