Ok, some updates here, just to keep the history clear

As discussed above, there has been a new mod released recently for the default Robinson R22, with the following features:
-Engine wear and Damage Simulation
-Engine and Tailrotor Gearbox Oil use
-Engine Oil condition (Affects Engine Wear)
-Engine Oil Change (Every 25 Hours Like Real R22)
-Engine Vibration in Virtual Cockpit (If Engine or Tailrotor are damaged, or you fly greater than 100 knots vibration will be greater then normal and you hear cockpit rattles sound effect)
-Tailrotor Strikes if Tailrotor Gearbox Oil is low
-Cyclic Vibration (if Engine is running)
-Cockpit switches Sound Effects
-Cockpit Instruments takes Dirt
-Cockpit Instruments will Damage if you land the helicopter very hard!I could test this mod and it really was nice, even though my flights were not long enough to see dirt accumulate on the gauges yet. The vibrations are a nice touch. Now, the author has announced that he is working on the
default DC-3 to include the usual features:
- Engine wear and damage simulation
- Engine Oil simulation
- Propeller wear and damage simulation
- Flaps and Landing Gear Damage simulation
- Wheel Brakes wear and damage simulation
- Vibration effects on ground-roll and in air (with sound effects)
- Adding several sound effects like cockpit switches and knobs
- Dirt effect on gauges
- Crash effects on gauges
- Two Cockpits to choose, one is default FSX and the other one is fitted with Autopilot and GPSWith the "Accusim"-style wear, the additionnal features and the external model from Manfred, the default DC-3 will really reach a totally new level of realism and immersion, that's quite a good news (for me, at least)