It wouldn't surprise me in the least. I'm sure there is plenty more investigation to be done. I'm just offering ideas here but there may be a possibility that the position or orientation of the unit may be a contributing factor. Obviously we don't know too much at all yet. Out of 6000 the one that catches fire just happens to be on a 787 seems cruel luck. All aircraft old and new have their problems but this is a particularly bad run of events.