Starting in December of 2010 we began installing these new level senders in the TKS tanks of the new production airplanes and sending them out as spares. These have been performing flawlessly so far. I like to use the scatter plot you see below to show the performance of parts. Each dot on the chart is a TKS level sender (dial) replacement in the field. The solid vertical line represents the point where the new TKS level sender was put into production and as you can see, we have not had a single replacement all of last year. This chart is for SR22, but it also holds true for SR22T.
We implemented the same technology for the fuel level sensing in late November of 2011 so there is a lot less airplanes in the field, but we can begin tracking the reliability of these parts in the field. A similar scatter plot for SR22 fuel level senders is shown below. Only one replacement and that was due to leaking and not due to erratic behavior. These new parts are also available as spares now.
We are confident that this change will be a good one and FAR more reliable than the existing versions. We are encouraging everyone who is seeing erratic behavior in fluid level sensing in their G3 airplanes to change out these dials to the new ones to get the much improved performance.
