Perfect! Now we start to think about it......
This is a typical scenario that if you set during a simulation session you can have 10 different replies.
Your solution makes sense but my considerations.....
If you have fire and as soon as you turn off the last engine it disappears, it can be extinguished or more easily only the indication disappeared.
Other solution..... maintain apu on in order to have am network powered....
Most of the time when you discharge the bottles you still have fire indications also if fire is extinguished.... so evaluate also this....
As you can see there are multiple scenarios and multiple answers.
A forum should be used also to learn (and eventually teach) the other point of view not only to fight and show others how much you know about an argument.
Thanks again for your reply and your used time