Momentary loss of screen power when airborne

[DavidRose]

Hi,

We have a D100 & D120 linked. Been installed and flying for about 15 months on a rotax powered Sportcruiser with not problems.

For about the last 3 weeks on every flight we have experienced a momentary loss of power to our D100 and occasionally both D100 & D120. The message " horizon recovering" is displayed and after about 4 seconds the horizon is back with us with correct QNH etc displayed.

Is this a temporary loss of power? Our D120  shows our voltage at about 11.9V when airborne, could a momentary drop be causing the screen loss?

Any thoughts on how to rectify this? We do not have a standby battery fitted in the D100, would fitting one cover any momentary voltage drops?

Thanks

 

[dynonsupport]

Given that it sometimes effects both instruments, it does sound like an intermittent power issue.

Fitting an internal battery to the EFIS-D100 would indeed solve that issue, though there's no battery available for the EMS-D120, of course.

The fact that you're seeing 11.9V while flying might point at some other issue. Nominally, you should be seeing 14ish volts when the engine is running.