Airbus switches - momentary or toggle?

[ryanf]

Hi All,

I am in the process of assembling some of my Airbus panels and I just wanted to confirm a couple of things:

1. Are the auto-brake selection switches momentary or toggle?

2. Do the landing gear annunciator lights have any function as switches - or just annunciators?

3. Are the engine warn/fail indicators on the engine start panel just annunciators or are they switches also? If switches, are they toggle or momentary?

Many thanks,
Ryan.

[jeehell]

Hello,

From what I could gather:

1 - Auto-brakes are momentary switches
2 & 3 - LDG gear/Engine Fail annunciators are only annunciators

You may want to cross check however, if dodiano is in the vicinity maybe ;)

[Swiss1673]

Hi

With the Software of Airsimtech (AST), the Autobreak Switch and offset is toogle! Diffrent then Boeing....

The rest are only annunciators.

Daniel

[ryanf]

Thanks guys!

[HansJansen]

Ryan,

Also make sure to look at Jerome Meriweather's site. He describes all Airbus (and other...) panels in detail, including whether you want switches or only annunciators.

See http://www.meriweather.com/320/fd-320.html

Regards,

[ryanf]

Great idea Hans!

[OmniAtlas]

Autobrake, MW, MC, Autoland, EGPWS/GS seem to be mon-off.

How about the Terr on HD? These can annunciate to the 'on' position even when off (you're flying into a mountain) and they would make sense to be mon-off PB.

[jeehell]

Yes the TERR ON ND are also MON-OFF.
Here a list I made, it may not be exhaustive:
-EXT PWR
-APU START
-Autobrakes
-yellow elec pump
-ADRs
-Fire Agents
-IDGs
-GND CTL
-MW/MC
-GPWS G/S
-AUTOLAND
-TERR ON ND

Regards
JL

[OmniAtlas]

Cheers, thanks for the list JL

[Fritz]

Hi Jean Luc,

could you please enable in FDS Interface IT Creator the possibility to assign those switches to "separate Press/Release action". E.g. it's possible for the yellow elec pump but not for TERR ON ND.

THX

[jeehell]

hi Fritz,

The YELL ELEC PUMP should not be used with separate Press/release actions.
The software will only work with "released" events in any case. So you NEED a MON-OFF there.

JL

[Fritz]

Hi JL,
then it is probably not caused by the assignment to separate press / release actions, but on the internal logic. I'm using the same switch for yellow elec pump, as for MW / MC and TERR ON ND. Only TERR ON ND display is shown when I push the switch.
So it is shown, if I push the switch and hold it and if I let go, it goes out again.
If the TERR ON ND switch is a MON-OFF then it should be, that TERR ON ND is shown when I press the switch a first time on goes out again if I push a second. Have I understood that correctly?
Regards Fritz

[OmniAtlas]

I think MON-off switches act like on off switches, but their position does not change, I.e no depressed position when they are pressed.

On the FDS EM1 min-off switches they pop back out when pressed in.

[Fritz]

I still use the FDS - K1 switches. For MON - OFF switches, the spring has to be removed so that the button can no longer engage. This is probably similar to the EM1 switches.
If JL cannot implement the logic to Interface IT Creator I need to wire a relay behind the switch.

[jeehell]

It seems there may be a little bug on the TERR ND buttons. I'll have a look.

JL

[OmniAtlas]

There is an old post by Peter on the FDS forum -- http://www.flightdecksolutions.com/forum/viewtopic.php?t=92&sid=67b8b36882c5940f0d0d6502d376e855

You can determine if it an annunciator or trim by looking at the trim of the button. Annunciators have black trim. PB have silver trim -- for example --

http://www.mycockpit.org/forums/attachment.php?attachmentid=10931&stc=1
You can clearly see the difference between the annunciators (LDG gear - black trim) and auto BRK PB - silver trim.

[Fritz]

In the new version B44 there was no change for the TERR ND buttons. If no changes are planned or is this still follow?

[OmniAtlas]

Had a chat with a few Airbus pilots the other day - they don't check the Autoland PB as part of their proceedure and it is more for maintenance.

I'm going to rewire the Autoland Korry as switches (they are
MOM for now) because I am short of MOM PBs.

[jeehell]

Fritz did you try to reassign the switch?

[Fritz]

I had not tried yet. I had reassign the switch now. Will test this on my next flight.

[Fritz]

I have test this morning after reassign the switch.
Still the same. If I push the switch and hold it, TERR ON ND is displayed.
If I let go the switch, TERR ON ND goes off.

I have seen on the Hydraulik Page a white triangle for the Yellow Elec Pump.
When I push the switch and hold it, the triangle becomes green and a line connected to
the Yellow hydraulic system. If I let go the switch, the triangle becomes white again.

It's different to the APU starter switch. This ist also a momentary switch.
But when I push the switch and let it go the APU starts after a while.
I cannot compare the assignments because I use Opencockpits Interface and FDS Interface Cards in my Overhead.
But there seems to be different configuration possibilities in ITT Creator.

[jeehell]

Hi,

I found the issue for the TERR ON ND, it will be corrected soon. The TERR ON ND switches will have the "toggle" option.

Regarding the Yellow ELEC pump switch, next version will work more correctly as well. In the meantime, you can use the "toggle" option in IIT Creator.

JL

[anzabon]

Hello guys,
sorry for digging in an old thread but I'm looking for the correct type of Korry switches on an Airbus flightdeck:

Which Korry switches are momentary and which are alternate/toggle?
I've checked Meriweather's site but he doesn't explain exactly which mechanical type each Korry switch is...
Is there a detailed list or does Airbus only use momentary Korries on their flightdecks?
Any help appreciated, many thanks in advance :-)

All the best
Bon

[OmniAtlas]

From a previous JL post --

Yes the TERR ON ND are also MON-OFF.
Here a list I made, it may not be exhaustive:
-EXT PWR
-APU START
-Autobrakes
-yellow elec pump
-ADRs
-Fire Agents
-IDGs
-GND CTL
-MW/MC
-GPWS G/S
-AUTOLAND
-TERR ON ND