I have tried twice to fly into KPIE from either KMIA or KFMY. KFMY in the DHC-3 “Beaver,” and from KMIA in the C700 "Longitude. In the “Beaver”, CTD while enroute in VOR to VOR navigation, and CTD in the Longitude while in GPS navigation (autopilot). I have yet to complete a planned flight in SU11.