Hi Marcel, PMDG did not create a full study simulation for the DC6.  The specific of what happens is probably pseudo random and includes things like in flight failure, decrease power, increase oil consumption and of course not starting.  PMDG didn't provide any details on the cause and effects.

Hi,

From my experience destroying a set of engines I believe we have a standard 'video game' health system. The engines start with some number of "points," and any mishandling deals them "damage." This probably occurs at a rate dependent on the type and level of abuse they endure. I believe the colored dots reveal how much life is left before the engine runs out of health and fails (therefore also how much damage they have already endured). I believe that my engines experienced decreased BMEP for given MAP/RPM settings as they degraded to amber status. They may have full function all the way down to 1HP depending on how PMDG decided to model it.

Robert Toten