A320 OEB Blocked AOA probes

[CONF iture]

Originally Posted by vilas

First the rejection of the third is no different than ADR3 fault should have come on ECAM

Airbus thinks otherwise and wants to keep the 'magic' as long as possible and so without noticing the crew of the real situation ...

One thing which I did not understand is why did the aircraft go in direct law.

"The aeroplane's high angle of attack and the roll movements generated asymmetry, and a speed variation between ADR 1 and 2 appeared. This increasing divergence caused a rejection of the three ADRs by the FAC then the ELAC".

As that 320 was in landing configuration, the flight control system passed straight to direct law.

[vilas]

CONF iture
Thanks, I missed that it was due to being in landing conf it went to direct law. In some situations ADR3 fault would trigger. It can easily be made to trigger in all cases of fault/rejection.

[q8pilot]

HI ALL , i don't know if its going to make sense for you all , but i will try anyway , always remember your A/C attitude in all stages and power setting , use severe turbulence tables to help you , the most trusted indications are engine power and nose up or down relative to the horizon , if you see the black and red strips check your props ( pitot and static ) if you see unusual nose up or down check your AoA , always cross any increase or decrease of speed with engine power , if it does not make sense THEN trust your engines , ALWAYS
IF IT DOES NOT MAKE SENSE FLY POWER AND ATTITUDE
FORCE YOUR AC TO GIVE YOU CONTROL BACK by taking it out of normal law
we all can fly with alternate law or direct law correct ??!! then it i want to have my controls back

[CONF iture]

http://www.bfu-web.de/EN/Publication...ublicationFile

I can understand trim up operation is frozen under auto, but why should it be under manual ... ?

[sonicbum]

Hi gents, apologies if it had already been discussed. Is there any way to reproduce in a CAE SIM the Abnormal V Alpha Protection ? Probably by failing the AOA heating and inserting severe ice accretion we should get a similar effect, as the procedure asks to switch off 2 ADRs as well, but I was wondering if there is anything else that can be done to reproduce it, obviously for training and awareness purposes.
Thanks

Edit : Correction the procedure for double AOA heat failure calls for one of affected ADRs OFF. I remember a few years back the procedure used to switch OFF all the affected ADRs and leave one for stall warning.