[2.9.21.16552] DC BUS light does not come on in case of double generator failure

[Stickler]

According to all RL manuals available, the DC BUS caution light will illuminate when the main DC bus and the essential DC bus are disconnected, and specifically in case of a double generator failure.

While I have not been able to deliberately cause a disconnect of the main DC bus and the essential DC bus that does not involve unpowering the essential DC bus completely, and there is currently no way to induce a double generator failure via the failures menu, my assumption is that switching OFF the generators after a ground start or while airborne is likely to be equivalent to a double generator failure.

In that case, the DC BUS light currently does NOT illuminate; in fact, I have never seen that light illuminate at all unless during a lights test.

Considering that in case of double generator failure in the air, all buses except the battery and the essential DC bus are unpowered, the DC BUS must be powered by either of these buses, otherwise it would not illuminate as per the manual.

Since the EJECT light is powered by the battery bus, I assume the fire and overheat warning lights and the DC BUS light should be as well.

I recommend the DC BUS light be checked for proper functioning.

Edited yesterday at 09:12 AM by Stickler