According to FR24 [0], the decrease in altitude corresponds to an increase in groundspeed. If you're flying through descending air, the groundspeed generally w

According to FR24 [0], the decrease in altitude corresponds to an increase in groundspeed. If you're flying through descending air, the groundspeed generally wouldn't change, just the rate of climb decreases. Even if you increase thrust, you'll use this to arrest the sink rate, rather than increase groundspeed. Instead, it looks like they first traded altitude for airspeed, then airspeed for altitude, and ended up close to the original climb track. Sounds more like a straightforward dive to me. [0] https://www.flightradar24.com/blog/united-airlines-777-dives-after-departure/ https://www.flightradar24.com/blog/united-airlines-777-dives...