But don't get confused with Loss of Tail Rotor Effectiveness. Shame to dump a perfectly serviceable aircraft on the ground. Of course better to be on your side with a serviceable tail rotor than still flying with a broken one - but knowledge of your aircraft should help work out what's happened.
If in a Gazelle or other Fenestron aircraft you need to understand how a Fenestron puts out its power so you can fly it appropriately and not getting into what is incorrectly called Fenestron stall. I know the Guimbal service letter on the topic is excellent if you can get your hands on it.