Apparently a distraction in the cockpit;they missed the gear up buzzer alarm
The “gear up” tone can be heard in the background in the plane’s transmission to ATC. Clear as a bell. One theory is they were coming in way too fast, and in the airbus the gear will not deploy over a certain airspeed.
CC
The gear were deployed above 10,000 ft and at high speed causing an alarm that they were not locked. The alarm was ignored or silenced. Photos from the ground show the gear down on final approach. One of 2 things then happened. Either they actually touched down and got a new gear unlocked alarm, or they decided the first alarm was correct and tried to initiate a go around. They then raised the gear and increased engine throttles, but the engines could not spool up fast enough. By this time they were halfway down the runway with the gear up and stowed. They then bounced along the runway 3 times hitting the engine nacelles each time, before finally gaining enough speed to climb out before reaching the end of the runway. They radioed to go around. By that time the damaged engine transmissions began to seize causing the engines to slow to the point that the aircraft stalled. They crashed before returning to the airport.
“they missed the gear up buzzer alarm.”
And apparently missed it on the check list.
Additionally, there are “tips” like green and red dot markers on the PFD Airspeed Scale that are there to warn the pilots on speed problems. He never should have tried to land the aircraft, it was way too hot.
A good article on this is here:
https://safetyfirst.airbus.com/control-your-speed-during-descent-approach-and-landing/
rwood