Thanks FO2 - effectively same as any turbine engine.
If it is the case that the engine goes out cleanly then there is negligable risk to test that then - if however it is not so simple then this should be known.
It may not be so simple in the case where the unuseable fuel quantity is SO high - the 'running out of fuel' part not being at an intstantaneous event but rather a very gradual partial fuel supply - am I getting that point across or not?
I would guess that the fuel to the combustion chamber does not hit zero but instead has a period of wild variation for some period prior to eventual flame out.
I'd hate the point to be dismissed without anyone actually understanding the point. Understand it and then dismiss it with some facts by all means.
I am amazed that anyone thinks it would be dangerous to allow one engine to flame out under controlled conditions - and if it is that dangerous then perhaps it shouldn't be?
Maybe the AAIB will consider the point more carefully than the experts on this forum?