Not as stupid an idea as it sounds (to some people)...
Of note, someone had a good idea to add something like this into the Lynx once; a crash detector that would shut down most of the aircraft's vital systems.
The system is disabled because the risk of it going off giving you an immediate double engine failure with added total electrical failure when it's not supposed to outweighs that of it doing any good in a crash.
This is not a late April Fool BTW!