That's a secret
I noticed the wink, but just in case you're interested for real, the Canadian Forces 412s are HUMS equipped (Stewart Hughes/Teledyne) and monitor vibration levels on rotors, all external bearings, Main Drive Shaft, all gearboxes, along with speeds (N1 and Np), Qs, Ts and Ps, usage etc etc.
Is Sultan who I think it is Nick?