Cobham's electronic flight instrument system (EFIS) has received US Federal Aviation Administration supplemental type certificate amendments to provide localiser precision with vertical navigation (LPV) approach capability.
LPV is a type of approach based on the wide area augmentation system, published on area navigation (RNAV) GPS approach charts. This procedure takes advantage of the precise vertical and lateral guidance available from WAAS to provide precision approaches equivalent to the instrument landing system at thousands of airports across the USA without the need for the ground infrastructure.
The amendments cover both larger-model (Part 23) under STC SA02254AK and the Citation 501 under STC SA02220AK.
Hardware and software required for LPV capability on these aircraft includes: WAAS Beta III GPS receiver, Cobham 7.0E operating system software, and an analogue Interface Unit-2, if Cobham's EFIS is driving an analogue autopilot system.