S76C++ Brazil Platform accident

[gulliBell]

You shouldn't have to kick right pedal in, you just need to take your feet off the pedals for the mixing unit to stop driving down the collective. The mixing unit is only driving the collective down because system limits have been attained before the pedal stops have been reached. Thus, further application of left pedal results in the collective driving down through the interaction of the mixing unit, with no change in tail rotor pitch. Just take your feet off the pedals and let up collective have priority. The same considerations also apply to some tail rotor malfunctions (particularly, TR control jam aft of mixing unit malfunction).
This scenario can't be practiced in the aircraft, but it can certainly be practised in the simulator. For those S76 pilots who do initial or recurrent training in the simulator, ask your instructor to demonstrate for you. The natural instinct is to maintain directional control, but you must overcome the urge to press left pedal because 1. you ain't gonna get any more tail rotor pitch change no matter how hard you press on that left pedal, and 2. the harder you press down on the left pedal the more the collective is going to drive down and put you at risk of hitting the deck hard. And if you're yawing when you touch down hard there is a chance you might roll over. And rolling over on a small helideck with the rotors turning is likely to bump you over the side, and floats inflated isn't going to soften the uncontrolled landing for you.
I've never experienced this scenario in operational flying, but I have experienced the opposite example where the aircraft is very light landing at the crosswind limit, using right pedal to maintain directional control to the extent that the collective rises and causes you to jump back in the air. Again, you just need to back off on the pedal input to allow the collective to go down and just accept some rotation on landing. If flying 2-crew CRM is important because one pilot who is taking corrective action can be over-ridden by the other pilot who is spooked by the situation, but who has the stronger legs. Stronger arms is never going to win the battle against stronger legs and the mixing unit in this situation. It's something that might be mentioned by the pilot flying as part of the landing brief when you're expecting to land heavy with right crosswind limit or light with left crosswind limit; but ordinarily, even at these crosswind limits, you should still be well within the normal flight control envelope and not getting to any system limits where adverse collective-yaw coupling might arise.