Who are the mystery pilots who successfully landed endangered Flydubai flight 1073?

A passenger on Flydubai flight 1073 has described the actions of on-duty crew members who rushed into the cockpit to stabilise and land the plane after the co-pilot attacked the captain with a crash axe. The flight carrying 182 people en route to Israel was able to make an emergency landing in Saudi Arabia after a descent so extreme that part of its rudder was torn away.