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Old 11th Aug 2019, 13:34
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Uplinker
 
Join Date: Nov 1999
Location: UK
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To help troubleshoot this (on the ground while not in flight), you can switch the ATT HDG ECAM switch to Capt on 3.

If the odd display remains the fault is downstream of the DMCs. If the fault clears, the problem is at, or upstream of, DMC 1.

Last edited by Uplinker; 11th Aug 2019 at 13:49.
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