Originally Posted by
Weads
The Bell 407 RFM states that for a FADEC RESTART FAULT : When throttle is repositioned to idle stop (during engine shutdown) the PMA will go offline and engine may flameout. The PMA goes offline when the NP goes below 85% but the FADEC should still be supplied by DC battery/gen power. So my question is why would the engine flameout at idle with a RESTART FAULT? Thank you for any insight!
It's been a while, but I believe that while a loss of airframe power to the FADEC will trigger a FADEC FAULT light, it might also trigger a RESTART fault. A loss of airframe power would be the only situation where a loss of PMA power would cause an engine flameout.