Disagreeing Flight Directors - A320
Thread Starter
Joined: Sep 2003
Posts: 502
Likes: 17
From: Dunnunda
Disagreeing Flight Directors - A320
G'day All,
Just wonding if anybody would be able to shed some light.
On departure, GPS primary. No FM/GPS disagree. FMGC syncronised, Captain FD indicates a turn to intercept, FO FD is still squared for a few moments then begins to indicate the turn.
I have seen this usually during climb. One FD may indicated a different target attitude than the other.
Can anyone shed some light on what might cause this?
Just wonding if anybody would be able to shed some light.
On departure, GPS primary. No FM/GPS disagree. FMGC syncronised, Captain FD indicates a turn to intercept, FO FD is still squared for a few moments then begins to indicate the turn.
I have seen this usually during climb. One FD may indicated a different target attitude than the other.
Can anyone shed some light on what might cause this?
Joined: Mar 2000
Posts: 1,337
Likes: 1
From: Sunrise Senior Living
Disagreeing FD Bars in the A320 series - seen mainly in descent - is the result of slightly different calculations between FMGC 1 and 2. The autopilot will of course satisfy the FD demands allied to the engaged autopilot and thus the PNF will see the FD discrepancy.
Hope this helps,
mcdhu
Hope this helps,
mcdhu
