If you only rely on the firewire...
Assuming something other than a SeaKing.....perhaps it might be a different system altogether....like an Infrared detection system that just loves some Sun Light shining through an opening on the fuselage or engine compartment.
Crab.....Landing a burning helicopter on an Oil Rig is NOT an option....ever! Likewise....if your bird is so damaged you need to land immediately....it is the Oggin you take it too....not a Rig.