According to https://aviation.stackexchange.com/questions/32111/what-is-the-descent-rate-in-emergency-situations https://aviation.stackexchange.com/questions/32

According to https://aviation.stackexchange.com/questions/32111/what-is-the-descent-rate-in-emergency-situations https://aviation.stackexchange.com/questions/32111/what-is-t... it's a relatively safe speed in an emergency. Note, speed brakes are deployed to increase drag, which helps increase vertical descent without overspeeding the wings. The plane doesn't need to be pitched down all that steeply to drop quickly and if you're falling at a steady rate, everything will be at 1G.