ADR 1+2 fault approach with Flaps 1+F
Thread Starter
Join Date: Sep 2015
Location: London
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
ADR 1+2 fault approach with Flaps 1+F
Hello fellas....
If you have an ADR 1+2 fault in clean configuration, you handle the failure and got “Ecam actions completed”.
After that, start configuration for app, and i ve noticed that when you call “Flaps 1”, you will have flaps and slats instead of just slats and must take care of the 215kt lim for Flaps 1+F.
Does anyone knows why will we have flaps and slats at the same time for this abnormal configuration?
I’ve been looking everywhere and cant find any info....
cheers!!
If you have an ADR 1+2 fault in clean configuration, you handle the failure and got “Ecam actions completed”.
After that, start configuration for app, and i ve noticed that when you call “Flaps 1”, you will have flaps and slats instead of just slats and must take care of the 215kt lim for Flaps 1+F.
Does anyone knows why will we have flaps and slats at the same time for this abnormal configuration?
I’ve been looking everywhere and cant find any info....
cheers!!
Last edited by estigma81; 8th Oct 2018 at 11:56. Reason: Correct error
Only half a speed-brake
We normally get 1+0 (instead of 1+1) only after an IAS check is satisfied, have a look into FCOM DSC F/CTL for the exact number.
With two ADRs gone completely as per your scenario, the A/C is flying on one IAS source only. But what if this remaining speed is also wrong? Can you trust it? Nobody knows. And so the system will fall-back and respond in a conservative way, giving you 1+1.
During ab-normal operations, you will see similar reversions to "simple modes" everywhere, it is very logical. Whenever the computers cannot validate the data inputs, the "smart" and more elaborate features are not available.
(disclaimer: the above is what I think is the reason)
With two ADRs gone completely as per your scenario, the A/C is flying on one IAS source only. But what if this remaining speed is also wrong? Can you trust it? Nobody knows. And so the system will fall-back and respond in a conservative way, giving you 1+1.
During ab-normal operations, you will see similar reversions to "simple modes" everywhere, it is very logical. Whenever the computers cannot validate the data inputs, the "smart" and more elaborate features are not available.
(disclaimer: the above is what I think is the reason)
Last edited by FlightDetent; 7th Oct 2018 at 19:35. Reason: grammar and clarity. hope.
Join Date: Mar 2000
Location: Sunrise Senior Living
Posts: 1,338
Likes: 0
Received 0 Likes
on
0 Posts
Have a look at MEL 34-10-02B ADR 2 which tells us that "if ADR 2 is set to OFF, and if the ac is in Conf 1+F, the SFCS No2 Flap channel is unable to cross check the CAS coming from ADR 1with the ADR 2 CAS coming from SFCS No 2 Slat channel/ This may lead to uncommanded flap retraction during the take-off.
Although not strictly what is being asked here, this makes it obvious, as FD says above, that you never quite know what is going on during multiple failures. You just have to play the cards you are dealt.
Not helpful, I know, but we have all been there!!
Although not strictly what is being asked here, this makes it obvious, as FD says above, that you never quite know what is going on during multiple failures. You just have to play the cards you are dealt.
Not helpful, I know, but we have all been there!!
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,407
Likes: 0
Received 0 Likes
on
0 Posts
I don't see any reason why would you get 1+F when double ADR (not withstanding the combination) failure is confirmed. It may be possible in unreliable speed case if the speed below 100kt is erroneously sensed or the failure is double ADR failure second not self detected. But once faulty ADR is identified and switched off. Flap operation should be normal.
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,407
Likes: 0
Received 0 Likes
on
0 Posts
estigma
I checked both ADR1+2 and ADR1+3. when I selected flaps 1 only the slat extended as usual. As I said in unreliable speed situation there is a possibility of this happening not in normal double ADR FAIL.
I checked both ADR1+2 and ADR1+3. when I selected flaps 1 only the slat extended as usual. As I said in unreliable speed situation there is a possibility of this happening not in normal double ADR FAIL.
Join Date: Jan 2014
Location: N5109.2W10.5
Posts: 720
Likes: 0
Received 0 Likes
on
0 Posts
Speedwinner
Hi, It depends on the fault inserted into the simulator. I have seen the same result you describe many times.
FCOM 27-30-10 Description - Configurations shows that there is a 100 Kt speed logic which determines whether you get Slats1 or 1 + F.
You have to read the Flaps / Slats gauge carefully to notice.
Hi, It depends on the fault inserted into the simulator. I have seen the same result you describe many times.
FCOM 27-30-10 Description - Configurations shows that there is a 100 Kt speed logic which determines whether you get Slats1 or 1 + F.
You have to read the Flaps / Slats gauge carefully to notice.
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,407
Likes: 0
Received 0 Likes
on
0 Posts
