A320 ADR dual fault

[fiftypercentn1]

Hi guys, as usual thanks for you help.
If I have a failure of 2 ADR, the flight directors are still useable? or is there anything preventing me from doing that?

[atila_101]

Hi there,

You cannot use F/D in either case ADR 1+2, 1+3 or 2+3. However you can also go back to Track/FPA and use the "bird" that should be good enough to fly raw data.

Hope that helps.

cheers.

[aguadalte]

From FCOM 3
UNRELIABLE SPEED INDICATION/ADR CHECK PROC
*in case remaining altitude is unreliable
(...)
Do not use FPV and/or V/S, which are affected

FPV is not to be used in case of unreliable speed indication.
You will have to go back to basis: ATT and Power.

[foff]

the previous message is wrong.
FPV can be used except if the remaining altitude is unreliable. it's written in bold in the check-list !

[SupaMach]

Agree with the above.

[aguadalte]

*in case remaining altitude is unreliable

Sorry folks, my mistake. I have just edited the text. Thanks for calling the attention.
Fly safe.
A.

[dogo]

bird and track index

Somebody could explain me if the track index (blue line over the bird) will be displayed in the PFD (to help during ILS raw data) in case of dual ADR fault. Thanks

[Essential Buzz]

dogo ...

Any time you have a failure where the flight directors disappear (i.e. Dual ADR Fault etc), there will be a red "FD" box on the PFD. It's often overlooked in the heat of the moment, but if you deselect the flight director, this will give you the blue track line.

In conjunction with TRK-FPA, this at least gives you a track target to fly.