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A320 FCU potentiometers behind SPD, HDG, ALT and VS knobs

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A320 FCU potentiometers behind SPD, HDG, ALT and VS knobs

Old 1st Jan 2021, 11:05
  #1 (permalink)  
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Join Date: May 2001
Location: England
Posts: 1,828
A320 FCU potentiometers behind SPD, HDG, ALT and VS knobs

Happy New Year's guys...

The A320 FCU uses some unique momentary (non-latching) pull/push type potentiometers for the SPD, HDG, ALT and VS controls. Have any of you brave souls ever took an FCU apart to replace a pot or to give the springs/mechanisms a clean? I'm trying to find out the exact model number of one of those pots (not the knobs), or the name of the company who makes them (please don't say it's Airbus themselves!). This is for a home cockpit project. They're definitely available as a lot of home cockpit panel makers appear to be making use of components that feel just like the real thing.

Any help/steer greatly appreciated.



Superpilot is offline  
Old 5th Jan 2021, 16:30
  #2 (permalink)  
 
Join Date: Jan 2021
Location: Crawley
Posts: 1
Are you sure they are potentiometers?
I recall an avionic guy calling these encoders, have a look at the RS website.
Trying to find the component maintenance manual for this would probably be a good starting point, are there no part numbers on the items themselves?
I'm on furlough at present but I'll have a look when I get back to work (hopefully) to see if I can find anything, I'm interested in doing something similar.
Nuclear Device is offline  
Old 6th Jan 2021, 19:07
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QA1
 
Join Date: Apr 2008
Location: UK
Age: 65
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The FCU is made by Thales, originally Sextant. As ND says, I think the controls are encoders, not potentiometers.
The only numbers I have come across are: E16224AB, E16224AC, E16216AB, E16216AC.
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Old 9th Jan 2021, 17:08
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Join Date: May 2001
Location: England
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You are right, they are encoders. I found a substitute: https://www.mouser.co.uk/ProductDeta...frBpeWJg%3D%3D
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