Thanks to PilotWolf for agreeing.
On the black box question, I recall Q mentioned this about 18 months ago in the context of overspeeds and had some kind of product in consideration/ development.
Anything would need licensing, but a device that recorded (say) Engine or Rotor RPM for a flight and a time of occurence that could be downloaded to PC for analysis daily/ weekly/ etc would not be a big technology leap, just an add on to the volatile memory of the instruments that exist in these machines today.
Sort of a CO2 warning patch for engines.
Bet the aircraft change certification bodies will make a meal of it though ... ...
