Think on the flipside,
Could it be that an AN124 is positioning to NBO and they the airline or chartere have offered 37tons available payload for resale to reduce costs?? In otherwords max fuel to NBO including enough for the next leg which leavse a 37ton gap they can fill with revenue??!!!
Mr Antonovman.. was that really a typo on the fuel burn?? 16/18 tons/hr is more like cruise burn.. hope you're fine...