ok. so far this is good info, thanks.
What i mean by running rough is an increase in engine Vibration readings (compared to normal operation with PMC avail) this was noticeable throughout the whole airframe, mainly during manual power increase required during the climb as we had lost the a/thr.
What i fail to understand is the loss of the N1 digi indicator for eng no.1 but not eng no.2 is this due to the associated PMC with that eng?
Can anyone see or explain any reason why the engines my sound rough with loss of the PMC or was it completely coincidental !