20-138B - Airworthiness Approval of Posistioning and Navigation Systems (Cancelled)

Cancellation Notes
AC 20-138C
Date Cancelled
May 08, 2012
Date Issued
September 27, 2010
Responsible Office
AIR-130,  Aviation Safety - Aircraft Certification Service, Aircraft Engineering Division
Description

This advisory circular (AC) provides guidance material for the airworthiness approval of installed positioning and navigation equipment. Positioning and navigation equipment may be used for a variety of functions such as navigation, automatic dependent surveillance, and/or terrain awareness and warning systems. This AC addresses the following avionics:

Global positioning system (GPS) equipment including those using GPS augmentations.

Area navigation (RNAV) equipment integrating data from multiple navigation sensors.

 RNAV equipment intended for required navigation performance (RNP) operations.

Barometric vertical navigation (baro-VNAV) equipment.

This AC does not address new satellite constellations that are planned or currently under construction. This AC will be updated when sufficient documentation exists to support multiconstellation equipment.