Originally Posted by
Nubian
SilsoeSid,
What do you call it then?
The Turbomeca Arriel 2B1 in the AS350B3-2B1(B3+) and EC130B4 has dual channel FADEC and EBCAU (Electronic Backup Control Ancillary Unit) Same with the Arriel 2D in the later model AS350B3e/H125 and the EC130T2/H130
In these helicopters you have no input whatsoever on engine governing, only selecting Flight or Ground Idle after start.
HLCPTER,
I think not. (in the models above at least)
In case of full FADEC failure (dual channel) the EBCAU takes control automatically, keeping NF within preset value and you'll land as soon as practicable.
And with the AS350B3e and EC130T2 the FADEC controls all. If you try to select ground idle in flight with the collective still 'up' it wont let you, it carries on (after a short blip) in flight mode. You then can not re-select ground idle, you have to shut the engine down in flight idle to reset it. You can only go to idle with the collective (almost) down first.