LPV is a GPS-based non-precision approach with no ground-based navigation aids and has similar minima to a Cat 1 ILS approach. Airfields with published LPV approaches are becoming more common on the continent and are starting to appear in the UK, with Exeter being the first mainland approval, plus Alderney in the Channel Islands.
The aircraft must be equipped with a WAAS GPS system approved to FAA/EASA E/TSO C146. Many aircraft already have a compatible Garmin GPS. Gama Aviation has produced an EASA Part 23 multi-model (AML) STC for the Garmin GNS430W/530W series permitting LPV and PRNAV capability. The Gama STC includes updating a non-WAAS unit to the later WAAS variant, so you don’t need to start from scratch if you have the older version installed. Upgrading an early GNS unit to WAAS also removes the problems of the first generation 28V versions for which support was withdrawn a few years ago.
The latest amendment of the STC allows LPV certification without the need to install a dedicated set of remote annunciators, subject only to the position of the GNS being within a prescribed distance of the vertical centreline of the primary attitude indicator and consequently reduces the cost to owners and should make the take-up of LPV more widespread in those aircraft where fitting the annunciator was difficult due to panel space constraints.
Pretty much all single-crew Part 23 aircraft (including twin turboprops such as B200) are now included in the amended STC, only excluding those light jets which can be operated as 2-crew per the type certificate, and any aircraft on the EASA orphaned list.
Click here to see the STC certificate
Click here to see the aircraft pre-conditions fact sheet