For those of you who think they can fly away from a failure involving the departure of the tail rotor gearbox...... you are kidding yourselves.
Look at Youchoob at any event where the rotor tip hits something - first thing that follows is the tail boom snapping off, fuselage rotates, all deady-bones.
In August 1981 at Williamtown, a B-model Huey had a weird failure where one T/R blade hit the fin, broke off, the imbalance tore the whole gearbox out, the change of cg made the nose drop and yaw but the disc stayed where it was, mast bump, rotor separation, tail boom chopped off, blade passed through front cabin (very messy) and the whole lot dropped upside down from 1500' into a swamp.
Don't even consider playing with the CG "just in case the gearbox falls out". Keep it in limits all the time.