"He also decided to open both the side vents and the nose vent as the carbon monoxide light had illuminated. This is not unusual when the helicopter engine is running for a period whilst stationary. "
Hoping to learn here: Anyone else have this as a "normal" event when starting an R44. I learned in, and then flew for a few years a number of Raven II models (also owned one myself) and never saw the CO2 light illuminated other than in "Test" mode. The school also had several Raven II machines, and the only one I heard of which had an illuminated CO2 light other than in "Test" was shut-down and withdrawn from service first time it happened; turned out to have a cracked exhaust manifold and once repaired it never did that again.
I can theorize how it might occur - starting with a tail wind?- but is this actually "normal"?
Thanks