Narco MK 12D

[Htmlkid]

My narco secondary navcom upon startup today did not display anything. I turned it off and on and nothing...in flight I turned it on again and it worked perfectly. This happened again after shutdown park and restart... any ideas what could be going on?

[R Van Dyck]

I had the exact same thing last week. Get you a 7/64th Allen wrench and remove your radio from the tray and re-install it. Press firm in the corners to assure a good re-seating. Then tighten with the Allen wrench to allow the cam over and squeeze the radio tight in the tray. My problem was the Cam got partially cammed over and tightened, then you fly, and vibrations loosen up or the cam slips, and your radio loosens up the seating in the tray and then you loose it.

Fly Smart,

Ryan

[OR75]

~ 12.5 vs. 14V when the engine / alternator is on ?

[Htmlkid]

42 minutes ago, OR75 said:

~ 12.5 vs. 14V when the engine / alternator is on ?

If that was the case wouldn’t other instruments not work also?

[OR75]

Thresholds can be different for different instruments 

older instruments Can have a narrower range 

[Lake Aero]

On 4/8/2020 at 12:41 PM, Htmlkid said:

My narco secondary navcom upon startup today did not display anything. I turned it off and on and nothing...in flight I turned it on again and it worked perfectly. This happened again after shutdown park and restart... any ideas what could be going on?

Check power/grounds. If that makes it, could be bad display.