Originally Posted by
tdracer
The EEC/FADECs will stay powered down to about 8% N2(N3) using the dedicated PMA. So yes, they will keep transmitting data so long as they are powered even if aircraft power is lost..
Actually, now that I think about it, most engines, including GE, have some engine sensor data hardwired to the aircraft, so the EECs don't necessarily need to be powered. The CF6, for example, had N1, N2, vibration and oil quantity. But I'm sure the engines were still above the required N2 to maintain PMA power.