Refer to your Operator / Regulator / Type manuals as to what "requires" an Evacuation.
Ours say something like "a confirmed unextinquished Fire". If this is the case:
- You need to "confirm" the fire e.g. via the window / ATC / other aircraft etc. - not just believe the warning (it may be false, or a minor fire near the detector)
- You need to carry out a reasonable attempt to extinquish it
Summary - a good question, but one that should be clearly answered via your own Ops Manual etc., not pPrune
NoD