I still wonder how they wanted to manage their flightdutytimes.
Maybe someone can help.
The operator is from Frankfurt Germany and T/O was from Hannover.
They must have been in Hannover already and rested at least 10hours.
The distance is approx. 6000NM ( exact 5971NM ) and that is HAJ-direct-ALA-direct overfly Lanzhou-direct HKG. No approaches included and every distance great circle. You never fly ALA-Lanzhou direct but it was easier to calculate. This leg is much longer.
Cruise speed is 0.80 459kt
or long range is .74 425kt
http://www.bombardier.com/en/3_0/3_2..._factsheet.pdf
No wind this means: 6000/459= 13h 04 minutes.
Max dutytime is only 14hours for a two man cockpit.
Considering 30minutes preparation ( min. by german law ) and 15 min. after work ( also min. by german law ) You got the 14h max duty time almost full.
But there is the chance to max it out by the commander under special circumstances to an additional 2 hours.
But in these two hours you got add the following:
You got taxitime out at HAJ and refueling ground time at ALA. De-icing, taxi in and out of ALA, approach into HKG and taxi at HKG and your 16hours are more then full.
Pretty sharp calculated timetable.