Ok, here is a question for you all, and one that I don't have an answer for.
Why do we have microswitches and lights to tell us that cabin and cockpit doors are open, when those same doors usually have someone next to them to close them if they come open, and the opening of those doors will not usually significantly impair the flying of said helicopter, but we have absolutely NOTHING to warn of an open or unlatched cowling on most helicopters? Sure having passengers fall out of an open door, through the harness that is keeping them tied to the seat is important, but isn't keeping stray cowlings out of the main rotor also important? According to manufacturers, it obviously isn't important enough!
Just my 2 cents