Al,

 

After giving it some thought, I like your suggestion.  Otherwise, where do you stop... "bug splats on prop resulting in reduction of airspeed..."  We're trying to get a handle on the big issues here.  Maybe it will get down to the finer details at a later date.  I changed your criteria slightly.  The criteria reads, "Engine related failures causing sufficient loss of power rendering the aircraft unable to complete the flight as planned."  This would include any engine system malfunction serious enough to require an unplanned landing.  Engine systems include the engine and gearbox, exhaust & intake (including throttle body/carb and air filter), cooling system (including heat exchangers and all hoses and fittings), charging/electrical system, ignition/efi system, oiling system, and motormount.  It would not include items such as weather, airframe or control surface issues, fuel starvation (due to dry tanks), pilot incapacitation, bird strikes, etc. 

So, I will edit my spreadsheet to include only the incidents which meet the above criteria.  Future additions will be limited to this criteria as well.  I will add a column to designate which system(s) failure was the cause of the incident.  Unless someone can approximate the hours at the time of these failures, I will not include it.

 

Here's another suggestion, it would be great if someone could start a tracking system where we can keep track of the total hours flown by all rotary-powered a/c.  Any takers?

 

Mark