It is possible to switch the Captain AS/M and ALT to the F/O's AS/N and ALT indicator and the F/O's AS/M and Alt indicator to the Captain's AS/M and ALT indicator. This is done with the ALTN switches not he Captain and F/O's instrument panels (see yesterday's post).
No switch is provided to change ADC inputs to the autopilot computers.
The ALTN switch pressed first has priority. The light being on in the ALTN switch means the associated instrument is using opposite date. After the ALTN switch is pressed, if the flags remain the instrument is at fault. If the flags disappear, the ADC is at fault.
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