I am having trouble locating this piece, but knowing it to be upside-down, it looks curious with the door buckling outwards and soot coming out of it.
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Also look at this hatch cover
Looks to me like the slide/raft container of the emergency exit aft of the wing, not sure whether left or right. It is just below the door (you can see the door sill scuff plate)
To my knowledge, no pyrotechnical devices on this equipment which may cause a fire, but I am here to learn.