> The Boeing 737-800 had just 220kg of fuel left in its tanks when it finally landed, according to a picture of what appears to be a handwritten technical log. Pilots who examined the picture said this would be enough for just five or six minutes of flying.

For reference, passenger airlines immediately declare emergency if their planned flight path would put them under 30 minutes of fuel (at least in the US). Landing with 5 minutes remaining of fuel is very atypical

220kg is about 1% of the plane's fuel capacity. They must've had a lot of faith in their fuel probes.