Originally Posted by
tdracer
So in the case of the Air India 787, the system would have lost all main-bus power generation a fraction of a second after the second fuel control switch was moved to CUTOFF, commanding the RAT deployment.
Whle I understand the recording function of the forward recorder would continue on the local battery, would not a very large majority of recorded data parameters have ceased being supplied to the recorder immediately on loss of main-bus power? Do we have any general idea of which ones? And between the RAT and the attempted relight of the engines, is there an identifiable point in the sequence in which power source for most of the data parameter sources would have resumed?