Hello chaps
Can you tell me what happens when we get the DSPLY SOURCE - annunciation on the PFD, other than the fact that we are operating on only one DEU?
The thing that I don't get is:
If one gets this above FL220, nothing happens.
If one gets this below FL220:
"the flight director pitch command bar is removed from both pilots’
displays
• the flight director pitch command bar reappears at ALT ACQ
• the autopilot engages in CWS P"
Why is this?
Thanks
