This hasn’t really popped up on TFP Fourms, and I thought a discussion like this should be a thing about Fire Alarms in Aircraft. Usually these are only in big jet liners, and only inform the Pilots, which then take action, but some of them are fun to hear!
My favorite by far is the McDonnell Douglas MD-11 Engine Fire Alarm:
I mean, in the air, these Fire Alarm Systems are way different than on land, but it’s still interesting!