VSI Indication operating too slow

[John Adams]

The vertical speed indication on my D10A is operating very slow and the readings my be exaggerated. What should I do to troubleshoot? Started flying my unit in 2006. It has had superb reliability. I cannot ever remember updating software or any other maintenance...

 

[Raymo]

When was your last pitot/static check done? The static test should find issues that would cause a problem with your VSI. Some testers do not test the entire system from the static port, they connect their equipment somewhere in the middle of the system, which is not the best way to test.

 

[Dynon]

Echoing the above, I'd start with the static plumbing here. For testing, you can conceivably vent the rear to cabin to test (realize that your altimeter may not be perfectly accurate in this case). You can even use your finger and press on the static port directly on the back of the unit. It should be pretty instantly responsive.

 

[DBRV10]

Sounds like water in a low spot or a bug has built a nest.