I flew the LNAV rwy 4 approach into TSVA yesterday and today. It is only an LNAV. The plane (WT CJ4/MSFS) flew an LPV approach. I’m a RW instrument-rated pilot and I know my way around approaches. The plane’s FMS generated and captured a glideslope. And whereas on a normal LPV approach the GPS would switch from LPV TERM mode to LPV APPR mode at the FAF, in this case it switched about halfway between the FAF (KESBI) and the MAP (UKREK). It also gave me a stepdown altitude (500 ft) which is nowhere to be found on the chart (the LNAV minimums are 850).
So I’m wondering if either there is an LPV approach at TSVA that just isn’t in the Navigraph charts, or if there is some other sort of underlying issue. I can imagine an advanced FMS calculating and creating it’s own glideslop for an LNAV approach, but I can’t see how it would be in LPV modes throughout an LNAV appraoch.