Just called my friend who is an RL army Gazelle pilot:
Shutdown procedure:
AP OFF
Collective on tight fricition (not simulated)
Landing projector off and stowed
Transponder, ADF, UHF, PR4G, NADIR off
Keep VHF MA on
Pitot heat, trim, RDR ALTM off
Emer AI caged
CG off
Pos light CLI (flashing)
Anti collision off
Fuel flow lever full back
Engage timer for 1 minute
170 rpm NR: Rotor brake
Once rotor is stopped and blade in the axis:
Pos light FIX (Steady)
Once the minute is passed:
Inverter off
Pump off
VHF off
Pos light off