Not a definitive answer, but what reasons might there be for simultaneous (or almost) loss of both engines that are not to do with fuel? Volcanic Ash? Massive rain ingestion? Suicidal flight-deck colleague? The list must be pretty short and in each case the cause is probably quite easy to spot.
My suggestion is that if you are not absolutely certain as to the reason for the dual failure, then a fairly likely suspect is fuel contamination/freezing or similar (BA38?). In those cases there may be little point in doing the checklist which is mostly concerned with trying to restart an engine, since you may be wasting time and need to re-prioritise.
The fact that the FOB isn't zero may not the whole story - you need to select the most appropriate checklist for the situation.