Hi Guys
The question Nats has asked is why the FDs are switched off together and put on together. Indeed there is such procedure and it is insisted upon in Airbus. The merits of flying manually with FD etc is different topic altogether. One of the conclusions of the inquiry of the accident was, had the other FD been switched off the ATHR would have changed to speed mode. What Ahramin stated in reply no. 8 is correct. It is because of the interaction with ATHR FDs must be on or off together.
Last edited by vilas; 13th May 2013 at 01:49.